Journal Description
FinTech
FinTech
is an international, peer-reviewed, open access journal on a variety of themes connected with financial technology, such as cryptocurrencies, risk management, robo-advising, crowdfunding, blockchain, new payment solutions, machine learning and AI for financial services, digital currencies, etc., published quarterly online by MDPI.
- Open Access— free for readers, with article processing charges (APC) paid by authors or their institutions.
- High Visibility: indexed within ESCI (Web of Science), Scopus, RePEc, and other databases.
- Journal Rank: JCR - Q1 (Economics) / CiteScore - Q1 (Economics, Econometrics and Finance (miscellaneous))
- Rapid Publication: manuscripts are peer-reviewed and a first decision is provided to authors approximately 23.5 days after submission; acceptance to publication is undertaken in 5.9 days (median values for papers published in this journal in the first half of 2026).
- Recognition of Reviewers: Reviewers whose reports are timely and of high quality receive an APC discount voucher for a future publication in an MDPI journal. Become a reviewer.
- Journal Cluster of Economics, Finance and Risk Systems: Commodities, Econometrics, Economies, FinTech, Forecasting, Games, International Journal of Financial Studies, Journal of Risk and Financial Management, Platforms and Risks.
Impact Factor:
2.8 (2025);
5-Year Impact Factor:
3.6 (2025)
Latest Articles
Artificial Intelligence, Sustainable Development Goals, and the Green Transition: Redefining Monetary Policy and Climate-Risk Assessment in Central Banking
FinTech 2026, 5(4), 89; https://doi.org/10.3390/fintech5040089 - 5 Oct 2026
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The accelerating digital transformation of finance is reshaping the institutional and analytical environment in which central banks address climate-related financial risks while maintaining price and financial stability. This paper examines the interplay between Artificial Intelligence (AI), Sustainable Development Goals (SDGs), and the green
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The accelerating digital transformation of finance is reshaping the institutional and analytical environment in which central banks address climate-related financial risks while maintaining price and financial stability. This paper examines the interplay between Artificial Intelligence (AI), Sustainable Development Goals (SDGs), and the green transition, with particular attention to their implications for monetary policy and climate-risk assessment in central banking. The study does not apply AI or machine-learning techniques empirically; rather, it adopts a qualitative and institutional perspective to examine the potential role of AI and broader digital capabilities in strengthening the identification, assessment, and monitoring of physical and transition risks within central banks’ mandates. The study adopts a conceptual and policy-oriented analytical approach based on evidence from Eurostat Sustainable Development Goal indicators, the Network for Greening the Financial System (NGFS) climate scenarios, European Central Bank (ECB) reports, and European Systemic Risk Board (ESRB) analyses. These institutional frameworks are comparatively examined to assess how climate scenarios, stress-testing methodologies, sustainability indicators, and digital analytical capabilities can support macro-financial risk assessment and climate-aware monetary policy. Particular attention is given to the institutional mechanisms through which these approaches can contribute to understanding the transmission of climate-related risks to inflation, financial stability, and banking-sector resilience. The findings suggest that the integration of SDG indicators, climate scenarios, climate-risk assessment frameworks, and emerging digital capabilities provides a more comprehensive basis for understanding the implications of climate-related risks for monetary and financial stability. The ECB’s Climate and Nature Plan 2024–2025 illustrates how digital technologies, enhanced data capabilities, and climate-risk modelling are increasingly incorporated into monetary-policy implementation, prudential supervision, and portfolio management. Within this broader digital transformation, AI represents an emerging analytical capability that may support the processing of complex datasets and the monitoring of climate-related risks. However, its effective use requires appropriate governance, data quality, transparency, institutional coordination, and regulatory safeguards. The analysis also highlights potential trade-offs between sustainability objectives and traditional central-bank mandates. This paper contributes to the emerging literature on sustainable finance, climate-aware monetary policy, and the digital transformation of central banking by developing an integrated institutional framework linking AI, SDG indicators, climate scenarios, and climate-risk assessment. The findings provide policy-relevant insights into how central banks can enhance their analytical and institutional capacities to address climate-related financial risks and support the green transition while maintaining price and financial stability.
Full article
Open AccessReview
Mapping the Crowdfunding–Entrepreneurship System: A Longitudinal and Structural Bibliometric Analysis
by
Mauricio Castillo-Vergara and Tiago Alves Ferreira
FinTech 2026, 5(4), 88; https://doi.org/10.3390/fintech5040088 - 2 Oct 2026
Abstract
Crowdfunding has become a central mechanism for entrepreneurial finance, yet the evolution and thematic structure of its intersection with entrepreneurship remain insufficiently understood. This study provides an integrated, longitudinal, and structurally grounded bibliometric analysis of 1518 documents indexed in the Web of Science
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Crowdfunding has become a central mechanism for entrepreneurial finance, yet the evolution and thematic structure of its intersection with entrepreneurship remain insufficiently understood. This study provides an integrated, longitudinal, and structurally grounded bibliometric analysis of 1518 documents indexed in the Web of Science Core Collection using VOSviewer (version 1.6.20) and SciMAT (version 1.1.04). We examine the intellectual structure, thematic evolution, and performance dynamics of the field across three periods, revealing a progression from financial and relational foundations to socio-technological consolidation and, more recently, thematic diversification toward impact, information asymmetry, behavioral mechanisms, and other explanatory determinants, while innovation remains a central organizing theme. The resulting thematic structure can be interpreted through a multi-level perspective, encompassing micro-level behavioral mechanisms, meso-level platform and firm strategies, and macro-level institutional and technological dimensions. Despite the growth of the field, the bibliometric structure remains thematically differentiated, with behavioral, technological, social, and geographic dimensions displaying uneven levels of prominence and connectivity within the analyzed corpus. Technofinancial themes such as blockchain and ICOs constitute specialized thematic streams with comparatively limited connectivity to the broader bibliometric structure. By identifying dominant trajectories, structural patterns, and comparatively underrepresented areas within the WoS-indexed corpus, this study provides a structured basis for future research and advances understanding of crowdfunding as a financial, social, organizational, and technological phenomenon.
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(This article belongs to the Special Issue Fintech Innovations: Transforming the Financial Landscape, 2nd Edition)
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Open AccessArticle
Consumer Preferences for FinTech Neobanks—A Comparative Study of Germany, Lithuania, and Taiwan
by
Jens K. Perret, Yihan Shen and Kamilė Taujanskaitė
FinTech 2026, 5(4), 87; https://doi.org/10.3390/fintech5040087 - 1 Oct 2026
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Over the last decade, FinTech companies, also referred to as neobanks, have started to crowd out traditional banks in an increasing number of financial services. This development has not been uniform across countries. Asian countries and the Baltics are at the forefront of
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Over the last decade, FinTech companies, also referred to as neobanks, have started to crowd out traditional banks in an increasing number of financial services. This development has not been uniform across countries. Asian countries and the Baltics are at the forefront of adopting FinTech solutions, while countries such as Germany still lag behind. Building upon this heterogeneity, the study aims to elaborate on differences in consumers’ preference structures regarding different aspects characterizing neobanks. A cross-country discrete choice experiment has been utilized to study the impact of five unique attributes on consumer perceptions and their preference structures. The design of the experiment is motivated by the structure of the UTAUT2 framework and evaluated via interviews with FinTech experts. The results illustrate the differences not only on a country level but also on a supranational (European vs. Asian) level. Across all countries, a general openness towards neobanks can be observed. Further findings indicate that even though differences do exist, they are mostly marginal. At the same time, preferences for attributes like ease of use and safety standards are present across all three observed countries. The results furthermore allow for a differentiation between hygiene factors and motivators.
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Open AccessArticle
Digital Scalability and Physical Infrastructure: What Is Associated with Carbon Emissions Within Listed Fintech Firms?
by
Sergio Rios-Vazquez and Marta Portela-Maseda
FinTech 2026, 5(3), 86; https://doi.org/10.3390/fintech5030086 - 19 Sep 2026
Abstract
Two features of fintech business models pull firm emissions in opposite directions: digital scalability, proxied by revenue growth, and physical infrastructure, proxied by capital expenditure. We measure both within the firm. Using an unbalanced panel of 86 firms across 18 countries for 2019
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Two features of fintech business models pull firm emissions in opposite directions: digital scalability, proxied by revenue growth, and physical infrastructure, proxied by capital expenditure. We measure both within the firm. Using an unbalanced panel of 86 firms across 18 countries for 2019 to 2025 (494 firm–year observations) from Refinitiv Eikon, we estimate two-way fixed-effects models of log CO2 and test heterogeneity with interaction models, joint Wald tests and small-sample-robust inference. A within-firm one-standard-deviation rise in revenue growth is associated with about 8% lower emissions, roughly 350 tons at the median firm, and is significant in eleven of thirteen specifications. The estimated revenue elasticity of emissions is 0.40: proportionality is rejected, but absolute decoupling is not established. Capital-expenditure intensity is associated with about 6% higher emissions, but the estimate is marginal under the CR2 correction and sensitive to specification. Neither joint test establishes heterogeneity across subsectors or regions, and both have low power. The findings bear on the climate-aligned regulation of digital finance and on how business-model characteristics enter ESG assessment.
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Open AccessEditorial
Modeling Behavioral and Cognitive Drivers of FinTech Adoption: Trust, Emotion and Digital Decision-Making
by
Stefanos Balaskas, Yannis Stamatiou and George S. Androulakis
FinTech 2026, 5(3), 85; https://doi.org/10.3390/fintech5030085 - 18 Sep 2026
Abstract
Financial technology has moved beyond the question of whether individuals will adopt digital financial services [...]
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(This article belongs to the Special Issue Modeling Behavioral and Cognitive Drivers of FinTech Adoption: Trust, Emotion and Digital Decision-Making)
Open AccessArticle
FinTech Regulation and the Greek Public Sector
by
Nikolaos Papanikolaou and Paraskevi Boufounou
FinTech 2026, 5(3), 84; https://doi.org/10.3390/fintech5030084 - 15 Sep 2026
Abstract
The rapid growth of financial technology (FinTech) has introduced significant regulatory challenges for public sectors across the European Union, particularly as digital finance becomes integrated into government operations. The European Union has established a comprehensive regulatory framework, including PSD2, eIDAS, GDPR, and MiCA.
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The rapid growth of financial technology (FinTech) has introduced significant regulatory challenges for public sectors across the European Union, particularly as digital finance becomes integrated into government operations. The European Union has established a comprehensive regulatory framework, including PSD2, eIDAS, GDPR, and MiCA. However, the transposition of PSD2 (a directive) and the implementation of eIDAS, GDPR, and MiCA (directly applicable regulations) at the national level remain complex and partial. This paper examines the FinTech regulatory landscape in Greece, focusing on its implications for the public sector. The study is based on a theoretical analysis of legal texts, policy documents, and academic literature. The analysis reveals that Greece has transposed PSD2 and implemented eIDAS, GDPR, and MiCA with reasonable timeliness, but implementation lags substantially due to fragmented institutional coordination, limited supervisory capacity, and the digital divide. Recent developments, such as MiCA implementation and the evolution of digital identity systems, further highlight the need for adaptive regulatory strategies. The paper develops a three-criteria analytical framework—regulatory alignment, institutional capacity, and practical application—that can be used to assess FinTech implementation across EU member states. Applying this framework to Greece reveals that while the country achieves full regulatory alignment for PSD2, eIDAS, and GDPR, it demonstrates limited institutional capacity and practical application. For MiCA, while regulatory alignment is achieved, institutional capacity is inadequate and practical application is weak.
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(This article belongs to the Special Issue Fintech and Financial Regulation)
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Open AccessArticle
A Multi-Stage Framework for Examining the Internal Activity and Refinement of the Cybersecurity Risk Mitigation System in Financial-Banking Environments
by
Laurențiu-Constrantin Stama, Roxana-Mariana Nechita, Dana-Corina Deselnicu, Cătălin-George Alexe and Cătălina-Monica Alexe
FinTech 2026, 5(3), 83; https://doi.org/10.3390/fintech5030083 - 15 Sep 2026
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The rapid digitalization of financial banking services has increased the need for effective cybersecurity risk mitigation as institutions rely on interconnected digital infrastructures. Understanding how technological, organizational, and human-related factors interact is important for supporting cybersecurity planning and risk management. This study examines
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The rapid digitalization of financial banking services has increased the need for effective cybersecurity risk mitigation as institutions rely on interconnected digital infrastructures. Understanding how technological, organizational, and human-related factors interact is important for supporting cybersecurity planning and risk management. This study examines the internal structure of cybersecurity risk mitigation in financial banking systems through a framework that combines bibliometric analysis, the Decision Making Trial and Evaluation Laboratory (DEMATEL) method, and the Matrix Impact Cross-reference Multiplication Applied to Classification (MICMAC) technique. The bibliometric analysis identified the factors most frequently associated with cybersecurity risk mitigation in scientific publications indexed in the Web of Science Core Collection. These factors were subsequently evaluated by a panel of IT and cybersecurity experts from the banking sector. DEMATEL was applied to examine the influence relationships among the identified factors, and MICMAC was used to refine the system by classifying the factors according to their driving and dependence power. The analysis provides a structured representation of the cybersecurity risk mitigation system and clarifies the role of each factor within the overall structure. The proposed framework may support managers, cybersecurity specialists and decision makers in cybersecurity planning, resource allocation, and strategic decision making within financial institutions.
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Forecast-Integrated Trading Algorithms with Adaptive Risk Management: Multi-Asset Empirical Evaluation
by
László Vancsura, Tibor Tatay and Tibor Bareith
FinTech 2026, 5(3), 82; https://doi.org/10.3390/fintech5030082 - 15 Sep 2026
Abstract
Predictive accuracy is often treated as a sufficient condition for profitable algorithmic trading, yet whether machine learning forecasts translate into trading performance that holds up across different market regimes remains contested. This study develops and stress-tests a prediction-driven, dynamically optimized trading framework across
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Predictive accuracy is often treated as a sufficient condition for profitable algorithmic trading, yet whether machine learning forecasts translate into trading performance that holds up across different market regimes remains contested. This study develops and stress-tests a prediction-driven, dynamically optimized trading framework across twelve instruments spanning equities, commodities, foreign exchange, and cryptocurrencies, and three structurally distinct regimes: a calm market (2018), the COVID-19 crisis (2020), and the Russian–Ukrainian geopolitical shock (2022). Daily price forecasts from RNN, LSTM, GRU, and hybrid architectures feed a rule-based framework that opens long or short positions from the divergence between predicted and observed prices, applies volatility-adjusted stop-loss and take-profit thresholds optimized by Sharpe-ratio grid search, and is extended with a rolling-MAPE confidence filter and an error-based dynamic position-sizing rule. Across the resulting 36 asset-period combinations, the prediction-based strategies outperformed the buy-and-hold benchmark in 86–92% of cases on cumulative return and 92% of cases on the Sharpe ratio; a one-sided binomial sign test rejects the null of no systematic advantage at p < 0.001 for every strategy variant, and the pattern is stable when each of the three regimes is examined separately (10–11 of 12 assets per period). Excluding crude oil—the only instrument where active strategies persistently underperformed, plausibly reflecting structural breaks such as the negative 2020 futures prices—raises the win rate to roughly 97%. Median outperformance reached about 15 percentage points in cumulative return and close to two Sharpe-ratio points, with maximum drawdowns falling in almost every case. The rolling-MAPE filter was the most effective mechanism for containing losses in turbulent regimes, while the position-sizing variant delivered the strongest average risk-adjusted returns. These results indicate that the value of machine learning forecasts in trading depends less on raw predictive accuracy than on the risk-management logic wrapped around it, and that this advantage is statistically robust across assets, regimes, and specification choices rather than an artifact of a single favorable sample.
Full article
(This article belongs to the Special Issue FinTech and Financial Stability: Opportunities and Risks)
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Open AccessArticle
Transaction Costs and Speed in the Ethereum Ecosystem: Scalability of the Mainnet and Layer 2s
by
Meghan Ambrosia and Bruce Mizrach
FinTech 2026, 5(3), 81; https://doi.org/10.3390/fintech5030081 - 11 Sep 2026
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We study the evolution of transaction speed and fees from January 2024 through March 2026, comparing Ethereum Mainnet and its Layer 2 (L2) networks, as well as Solana and Polygon. Ethereum has undergone upgrades that have increased block size and blob count. These
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We study the evolution of transaction speed and fees from January 2024 through March 2026, comparing Ethereum Mainnet and its Layer 2 (L2) networks, as well as Solana and Polygon. Ethereum has undergone upgrades that have increased block size and blob count. These upgrades have doubled transactions per second (TPS) on both the Mainnet and the L2 networks. Mainnet median fees have fallen from over $2 to under $0.02, and L2 median fees have fallen by more than 95% from $0.05 to $0.0015. We forecast that Mainnet median fees will converge with Solana’s in August 2027, but TPS will remain below 100 until 2034. The L1 Strawmap, proposing EIP-7938, a potential exponential increase in the gas limit, brings the Mainnet to only 100 TPS in January 2028. With continued blob expansion, L2s will surpass Solana’s TPS in March 2029 and have lower median fees by October 2026.
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Open AccessArticle
An Organizational Decision-Support System for Cybersecurity Risk Management: Classifying Breach Types Using XGBoost and Real-World Incident Data
by
Muhammed Samancı, Emrah Noyan and Nuri Avşarlıgil
FinTech 2026, 5(3), 80; https://doi.org/10.3390/fintech5030080 - 10 Sep 2026
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Financial institutions face an escalating volume of cybersecurity threats, yet existing decision frameworks rarely link predictive analytics to operational security priorities. Drawing on Task-Technology Fit theory, this study develops a machine learning-based decision-support framework to classify cybersecurity breach types in financial institutions and
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Financial institutions face an escalating volume of cybersecurity threats, yet existing decision frameworks rarely link predictive analytics to operational security priorities. Drawing on Task-Technology Fit theory, this study develops a machine learning-based decision-support framework to classify cybersecurity breach types in financial institutions and to identify the organizational risk factors that determine them. Analyzing 935 publicly disclosed incidents from the VERIS Community Database (VCDB, NAICS 52), we compare XGBoost against Random Forest, Logistic Regression, and Decision Tree. XGBoost achieves the most balanced performance (accuracy: 95.19%; weighted F1: 0.9519; 5-fold CV: 96.68% ± 0.21%). Feature importance analysis reveals ATM/kiosk infrastructure and breach pattern as the strongest predictors, translating into concrete SOC monitoring priorities. This framework supports UN/SDG 9 (Industry, Innovation and Infrastructure) and UN/SDG 16 (Peace, Justice and Strong Institutions) by strengthening the cyber resilience of financial institutions through open, replicable, data-driven methods. The open-data framework is replicable without commercial threat intelligence licenses.
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(This article belongs to the Special Issue FinTech and Financial Stability: Opportunities and Risks)
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The Convergence of Artificial Intelligence and Blockchain in Financial Systems: Opportunities, Challenges, and Future Directions
by
Pooja Lekhi and Kamal Nain Sharma
FinTech 2026, 5(3), 79; https://doi.org/10.3390/fintech5030079 - 8 Sep 2026
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Artificial Intelligence and blockchain are converging in ways that are quietly reshaping how financial systems operate. AI brings predictive analytics, automated decision-making, and fraud detection; blockchain contributes an immutable, decentralised record that can be independently verified. Taken together, applications such as AI-augmented smart
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Artificial Intelligence and blockchain are converging in ways that are quietly reshaping how financial systems operate. AI brings predictive analytics, automated decision-making, and fraud detection; blockchain contributes an immutable, decentralised record that can be independently verified. Taken together, applications such as AI-augmented smart contracts and blockchain-anchored data pipelines are already changing how fraud is detected, how compliance is handled, and how decentralised finance (DeFi) functions. But the same combination that makes these systems powerful also makes them harder to govern: technical, regulatory, and ethical obstacles still stand in the way of adoption at scale. This paper uses a targeted, purposive literature synthesis alongside exploratory case analysis of financial institutions and fintech platforms to examine how AI and blockchain are transforming finance together, what barriers and systemic risks accompany that transformation, and where research and regulation need to go next. Drawing on the Technology Acceptance Model, Diffusion of Innovation Theory, and the Socio-Technical Systems perspective, the paper builds a multi-level framework for thinking about how AI–blockchain convergence can be adopted responsibly across the financial industry.
Full article
(This article belongs to the Special Issue The Impact of AI in Business, Finance and Accounting)
Open AccessArticle
Model Monoculture Risk: Systemic AI Convergence in Banking and Financial Markets
by
Victor Frimpong
FinTech 2026, 5(3), 78; https://doi.org/10.3390/fintech5030078 - 7 Sep 2026
Abstract
As financial institutions become increasingly reliant on similar foundational AI models, cloud infrastructure, data providers, and AI middleware platforms, diverse firms may begin to interpret and respond to market signals in increasingly similar ways. This paper examines model monoculture risk as a potential
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As financial institutions become increasingly reliant on similar foundational AI models, cloud infrastructure, data providers, and AI middleware platforms, diverse firms may begin to interpret and respond to market signals in increasingly similar ways. This paper examines model monoculture risk as a potential source of system-level exposure in banking and financial markets. Drawing on a structured, purposive conceptual review of the academic and regulatory literature, it develops the M3 Framework—Model, Market, and Middleware—to integrate three interacting mechanisms: Model Similarity, Market Synchronisation, and Middleware Concentration. Rather than treating these as a fixed causal sequence, the framework identifies their independent and cross-layer effects and distinguishes AI-mediated synchronisation from correlation arising from common exposures, conventional herding, and shared macroeconomic shocks. The paper further proposes the Model Monoculture Risk Index (MMRI) as a prototype index architecture and conceptual supervisory screening framework for characterising configurations of AI-related convergence, rather than as a calibrated quantitative measure of realised systemic risk. An illustrative application demonstrates how exposure classifications vary across alternative M3 configurations and attribution assumptions. The paper argues that governance should prioritise cross-institutional monitoring, dependency mapping, meaningful substitutability, and targeted stress testing rather than diversification by default. The framework provides a structured basis for future empirical research on AI-driven convergence and financial stability.
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(This article belongs to the Special Issue The Impact of AI in Business, Finance and Accounting)
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Open AccessArticle
The Explainability–Reliability Gap in Fraud Detection: Evidence from SHAP and Permutation Importance Under Distribution Shift
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Istiaque Bhuiyan, Rahma Mirza, Ariful Hoque and Tanvir Bhuiyan
FinTech 2026, 5(3), 77; https://doi.org/10.3390/fintech5030077 - 6 Sep 2026
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This study develops an empirical audit framework for assessing the explainability–reliability gap in fraud detection: whether stable model explanations remain consistent with performance-based feature reliance under distribution shift. Using the Bank Account Fraud dataset suite, including a Base dataset and five biased variants,
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This study develops an empirical audit framework for assessing the explainability–reliability gap in fraud detection: whether stable model explanations remain consistent with performance-based feature reliance under distribution shift. Using the Bank Account Fraud dataset suite, including a Base dataset and five biased variants, the study examines group-size disparity, fraud-prevalence disparity, separability bias, and temporal shift. Logistic Regression, Linear SVC, and Random Forest are benchmarked using standard classification metrics, followed by cross-variant evaluation with Logistic Regression as the interpretable baseline. SHAP is used to assess explanation stability, while permutation importance measures performance-based feature reliance. The results show that accuracy and ROC-AUC can overstate practical effectiveness under severe class imbalance; notably, Random Forest retained useful discrimination while producing near-zero recall at the evaluated threshold. SHAP feature rankings remained relatively stable across variants, particularly for address-history, identity-similarity, credit-risk, device, and behavioral variables. However, permutation importance revealed weaker and more variable reliance on several SHAP-ranked features. The limited agreement between the two measures indicates a partial explainability–reliability gap. The findings show that explanation stability alone is insufficient for evaluating trustworthy fraud detection models and should be complemented by performance-based validation under biased and shifted deployment conditions.
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(This article belongs to the Special Issue FinTech and Financial Stability: Opportunities and Risks)
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Unveiling Bitcoin’s Financialization via Multivariate Wavelet Analysis
by
Javier-Basilio Muñoz-Carballo, Antonio-Javier Prado-Dominguez, Manuel Rodriguez-Lopez and Manuel Escourido-Calvo
FinTech 2026, 5(3), 76; https://doi.org/10.3390/fintech5030076 - 3 Sep 2026
Abstract
Since its inception, Bitcoin has evolved from a decentralized peer-to-peer electronic cash system into a prominent digital asset, sparking an intense debate regarding its fundamental economic nature. This study investigates the financialization of Bitcoin—its transition toward increasing dependence on traditional macroeconomic forces—over the
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Since its inception, Bitcoin has evolved from a decentralized peer-to-peer electronic cash system into a prominent digital asset, sparking an intense debate regarding its fundamental economic nature. This study investigates the financialization of Bitcoin—its transition toward increasing dependence on traditional macroeconomic forces—over the period 2019–2026. Employing a comprehensive suite of time–frequency methodologies, including Bivariate, Partial, and Multiple Wavelet Coherence (WTC, PWC, MWC), alongside a dynamic Sharpe ratio analysis, we examine the evolving interdependencies between Bitcoin and key systemic-risk indicators (VIX, OFR FSI), traditional safe-haven assets (Gold, U.S. T-Bills), and global equity benchmarks (Nasdaq, MSCI-IMI). The empirical evidence is inconsistent with the prevailing narrative of Bitcoin as a reliable safe-haven asset: it does not provide consistent downside protection during periods of high systemic stress, and its risk-adjusted performance declines synchronously across all holding horizons during macroeconomic contractions. Instead, once cross-market confounding factors are isolated, Bitcoin’s price dynamics co-move intensely with global equity cycles and systemic risk, particularly during crises. These results indicate a regime- and scale-dependent financialization: Bitcoin behaves as a highly integrated “risk-on” asset whose diversification properties are unstable precisely when downside protection is most needed. The study underscores the need for active portfolio management and coordinated regulatory frameworks to address Bitcoin’s deepening interconnectedness with traditional financial markets.
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(This article belongs to the Special Issue Cryptocurrency and Digital Cash)
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Open AccessArticle
When AI Agents Pay: A Rollback Governance Framework for Fraud and Execution Failure in Agentic Stablecoin Payments
by
Kamal Al-Sabahi and Yousuf Khamis Al Mabsali
FinTech 2026, 5(3), 75; https://doi.org/10.3390/fintech5030075 - 1 Sep 2026
Abstract
Stablecoin payment rails and agentic commerce are converging toward an environment in which autonomous AI agents initiate and settle payments on behalf of users without human authorisation of each transaction. This exposes a governance gap: chargeback mechanisms are too slow and too broad
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Stablecoin payment rails and agentic commerce are converging toward an environment in which autonomous AI agents initiate and settle payments on behalf of users without human authorisation of each transaction. This exposes a governance gap: chargeback mechanisms are too slow and too broad for machine speed execution failures, settlement finality precludes open-ended reversibility, and reversible-token standards supply mechanisms without a governance framework for their use. This paper develops such a framework for rollback, a risk-bounded recourse mechanism for high-confidence fraud and execution-failure events, specifying the first-level eligibility and routing logic of a three-layer recourse architecture (prevention, rollback, adjudication) through five governance dimensions formalised as propositions: trigger authority, rollback-eligible conditions, evidence standards, temporal boundaries, and outcome pathways. Developed through conceptual framework analysis informed by design science research, it is evaluated through scenario analysis across five payment-failure cases and a formative expert consultation. The scenarios route consistently, including a deliberately ambiguous case sent to adjudication under the framework’s own logic; the consultation provides preliminary support for all five dimensions. The framework is presented as a first-level eligibility and routing layer; the enabling institutional layer that must operate it (adjudicator accountability, appeal rights, liability allocation, and remedy funding) is delineated but deliberately not specified.
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(This article belongs to the Topic Artificial Intelligence Applications in Financial Technology, 2nd Edition)
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Open AccessArticle
Bitcoin Event Windows and Ecosystem Indicators, 2012–2024: Market, Trust, Protocol, and Institutional Milestones
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Miriam Garbárová, Juraj Fabuš, Iveta Kremeňová and Margita Majerčáková
FinTech 2026, 5(3), 74; https://doi.org/10.3390/fintech5030074 - 31 Aug 2026
Abstract
Bitcoin is often narrated through price cycles, yet major dated events affect different layers of the ecosystem. This study analyzes 21 Bitcoin-related events between 2012 and 2024 using a first-public-information dating rule, a mechanism-based event taxonomy, and daily Coin Metrics data. Price-defined milestones
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Bitcoin is often narrated through price cycles, yet major dated events affect different layers of the ecosystem. This study analyzes 21 Bitcoin-related events between 2012 and 2024 using a first-public-information dating rule, a mechanism-based event taxonomy, and daily Coin Metrics data. Price-defined milestones are retained as historical markers but excluded from mechanism-level comparisons. Baseline cumulative abnormal log returns are estimated with a constant-mean model over days −120 to −21 and reported for [−1,+1], [−3,+3], and [−7,+7] windows. The analysis adds standardized CARs, Benjamini–Hochberg multiplicity checks, date-sensitivity tests, estimation-window sensitivity, a market model using a capitalization-weighted Bitcoin-excluded crypto proxy, a crypto-plus-macro model using S&P 500 and broad U.S. dollar-index returns, and non-price ecosystem indicators. In the clean mechanism sample, trust shocks have the most negative median raw CARs (−16.8, −22.3, and −21.6 log-return percentage points across the three windows); exact trust-versus-other tests are significant for CAR3 and CAR7 (p = 0.002) but not for CAR15 (p = 0.082). Standardized tests show the same short-window pattern (p = 0.009 and p = 0.006). No individual event-level empirical p-value survives a 5% Benjamini–Hochberg correction, and market-model controls attenuate several effects, so the findings are interpreted descriptively rather than causally. On-chain indicators show that trust shocks coincide with elevated exchange flows and spot volume, while active-address and hash-rate measures do not indicate protocol-layer collapse. The study contributes a transparent framework that separates market reaction, service-layer stress, protocol resilience, and institutional significance.
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(This article belongs to the Special Issue Cryptocurrency and Digital Cash)
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Open AccessArticle
A Fractional-Rough Liquidity Model for Bitcoin Options: Implied-Volatility Asymptotics and Market Evidence
by
Edson Pindza and Hopolang Phillip Mashele
FinTech 2026, 5(3), 73; https://doi.org/10.3390/fintech5030073 - 23 Aug 2026
Abstract
Bitcoin option prices reflect terminal variance and the cost of managing convex exposure in a market with changing depth and execution quality. This paper asks whether a liquidity state can be separated from fractional rough volatility in Bitcoin option valuation. The contribution is
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Bitcoin option prices reflect terminal variance and the cost of managing convex exposure in a market with changing depth and execution quality. This paper asks whether a liquidity state can be separated from fractional rough volatility in Bitcoin option valuation. The contribution is a modelling combination: standard stochastic-calculus and rough-volatility tools are joined to a regime-switching hedging-cost reserve, producing a leading-order at-the-money implied-volatility lift. The empirical design tests a liquidity–IV association and its scale using a 700-contract Deribit snapshot, a 4513-trade 24-h window spanning two UTC dates, a 775,315-trade panel over 92 dates, Ether replication, and placebos. The association is strong in open-interest-weighted specifications and for puts, but is absent for calls; it remains after controlling for option premium. Leave-one-expiry-out validation improves open-interest-weighted RMSE but not unweighted RMSE. A realised-volatility HMM is only a market-stress diagnostic, not an estimated liquidity regime. An empirical one-step hedging exercise does not validate the model’s simulated hedging comparative static. Accordingly, the evidence is associational, put-side, and narrower than a causal or fully structural validation.
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(This article belongs to the Special Issue Cryptocurrency and Digital Cash)
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Open AccessArticle
Dynamic Connectedness Among FinTech, Green Assets, and Global Uncertainty
by
Muneer Shaik and Mohd Ziaur Rehman
FinTech 2026, 5(3), 72; https://doi.org/10.3390/fintech5030072 - 19 Aug 2026
Abstract
This study investigated the dynamic volatility connectedness among financial technology (FinTech), green indices, and global uncertainty metrics between June 2018 and May 2025. The research was conducted to understand how technological innovation and sustainability indices interact with systemic risk during periods of extreme
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This study investigated the dynamic volatility connectedness among financial technology (FinTech), green indices, and global uncertainty metrics between June 2018 and May 2025. The research was conducted to understand how technological innovation and sustainability indices interact with systemic risk during periods of extreme global stress, such as the COVID-19 pandemic, the Russia–Ukraine conflict, and the market disruptions of early 2025. The analysis employed a time-varying parameter vector autoregression (TVP-VAR) framework to capture time-varying interdependencies and risk spillovers across multiple market regimes. Key findings indicated that total dynamic connectedness intensified significantly during crisis events, with major spikes occurring during the 2020 pandemic onset and the 2025 shocks possibly related to the “DeepSeek” AI disruption and the US tariff announcements. FinTech indices and green assets consistently functioned as net transmitters of shocks, while uncertainty indices, particularly the VIX, served as net recipients. Notably, the Alternative Finance Index (AFI) exhibited regime-dependent behaviour, transitioning from a transmitter to a recipient during the COVID-19 pandemic. These results imply that innovative and sustainable sectors have evolved into systemic drivers of global market sentiment rather than mere recipients of external shocks. The findings provide critical insights for stakeholders in financial markets, helping them to rethink their current approaches and prevent financial losses amid market upheaval.
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(This article belongs to the Special Issue Advances in Fintech and Sustainable Finance)
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Open AccessReview
Responsible Large Language Models in Finance: A Descriptive Bibliometric Overview and Taxonomy of Responsibility
by
Chong Hui Tan and Qinxu Ding
FinTech 2026, 5(3), 71; https://doi.org/10.3390/fintech5030071 - 18 Aug 2026
Abstract
The rapid adoption of large language models (LLMs) in financial services has generated a growing literature on “responsible AI” in domains such as investment analysis, credit assessment, risk management, compliance, and financial advisory systems. Unlike earlier AI systems, LLMs introduce responsibility challenges that
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The rapid adoption of large language models (LLMs) in financial services has generated a growing literature on “responsible AI” in domains such as investment analysis, credit assessment, risk management, compliance, and financial advisory systems. Unlike earlier AI systems, LLMs introduce responsibility challenges that differ in important ways from those addressed by earlier responsible AI frameworks, including hallucinations, prompt injection and manipulation, generative opacity, instruction-following failures, context sensitivity, output inconsistency, and emergent capabilities that arise only at larger model scales. While responsible AI concerns extend across AI systems more broadly, this review focuses specifically on LLMs, which since 2022 have become a major technological force reshaping financial services and have generated a distinctive body of responsibility discourse that existing frameworks are only beginning to address. However, the meaning of responsibility in this literature remains heterogeneous and inconsistently operationalized across studies. This paper provides a structured review of research on responsible LLMs in finance using a broad-to-narrow screening process across Web of Science and Scopus, reported with reference to the applicable PRISMA 2020 items. We combine a descriptive bibliometric overview with qualitative content analysis to examine the corpus. The descriptive overview covers publication trends, publication venues, disciplinary orientations, geographic distributions, and institutional affiliations, while the qualitative analysis codes the corpus on two dimensions: responsibility depth—whether responsibility is constitutive of the paper’s contribution, operative within its design, or peripheral to its framing—and responsibility mode—whether that engagement is normative, technical, evaluative, or mixed. The findings reveal a field concentrated in the Operative–Technical mode. Constitutive contributions cluster in Normative and Mixed modes, while a purely Evaluative orientation remains comparatively uncommon. Addressing these limitations requires moving beyond principle-level discourse toward institution-specific accountability mechanisms, empirical evaluation across clearly documented research and operational settings, and systematic alignment with relevant financial regulatory requirements. These efforts must address the distinctive challenges posed by LLMs, rather than only concerns inherited from the broader responsible AI literature.
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(This article belongs to the Special Issue Generative Artificial Intelligence in Finance)
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Open AccessArticle
Network-Aware FinTech Intelligence for ESG Risk Forecasting: A Graph Neural Network and Transformer-Based NLP Approach
by
Michael A. Aruwaji and Ferina Marimuthu
FinTech 2026, 5(3), 70; https://doi.org/10.3390/fintech5030070 - 8 Aug 2026
Abstract
Environmental, Social, and Governance (ESG) risks increasingly propagate across interconnected supply chains, yet conventional ESG assessment methods remain largely reliant on firm-level disclosures and static ESG ratings that often overlook indirect risk transmission among trading partners. This study develops a network-aware artificial intelligence
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Environmental, Social, and Governance (ESG) risks increasingly propagate across interconnected supply chains, yet conventional ESG assessment methods remain largely reliant on firm-level disclosures and static ESG ratings that often overlook indirect risk transmission among trading partners. This study develops a network-aware artificial intelligence (AI) framework for forecasting ESG risk by integrating Graph Neural Networks (GNNs), transformer-based natural language processing (NLP), explainable AI, and conventional machine-learning techniques. The proposed framework combines supply-chain network structures, shipment-level trade information, ESG controversy records, governance indicators, and transformer-derived ESG sentiment extracted using FinBERT and RoBERTa. Using a dataset of 11,386 firms across 27 industries from 2015 to 2025, the proposed GNN achieved the highest predictive performance, outperforming conventional machine-learning models with an ROC-AUC of 0.913. The results further demonstrate that supply-chain network centrality and transformer-derived ESG sentiment substantially improve the early identification of firms exposed to future ESG controversies. By integrating network relationships with textual ESG intelligence, the proposed framework advances FinTech-enabled ESG analytics and provides a scalable approach for proactive risk monitoring, sustainable investment decision-making, and supply-chain risk management.
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(This article belongs to the Special Issue AI × DeFi × Sustainability: Redesigning the Operating System of Global Finance)
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