Cryptocurrencies and decentralised finance: functions and financial stability implications

Matteo Aquilina, Giulio Cornelli, Jon Frost and Leonardo Gambacorta

Chapter 23 in Research Handbook of Macroprudential Policy, 2026, pp 522-545 from Edward Elgar Publishing

Abstract: Cryptocurrencies and decentralised finance (DeFi) aim to replicate many of the economic functions of traditional finance (TradFi), but their distinctive features introduce new financial stability risks. We analyse these features and examine key developments, such as smart contracts, decentralised exchanges (DEXs), stablecoins and new forms of central bank money. Our findings suggest that while the underlying economic drivers are not different from those in TradFi, DeFi poses significant challenges, including new forms of information asymmetries, market inefficiencies and the risk of cryptoisation in emerging markets. We propose tailored regulatory interventions, such as embedding rules within smart contracts and strengthening the oversight of stablecoins, to manage financial stability risks. Finally, we provide a framework for prudential regulation that can mitigate risks while fostering innovation in the rapidly evolving crypto ecosystem.

Keywords: Cryptocurrencies; Decentralised finance (DeFi); Financial stability; Central bank digital currencies; Smart contracts; Stablecoins; Cryptoisation; Prudential regulation (search for similar items in EconPapers)
Date: 2026
ISBN: 9781035306206
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