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Forex and cryptocurrency are increasingly connected, but they have not merged into one market. The clearest link is the use of dollar-pegged stablecoins to obtain dollar exposure: flows into those tokens can affect local exchange rates and the cost of dollar funding in traditional FX markets. That effect is measurable in a specific set of markets, but it does not mean every cryptocurrency behaves like a currency or moves foreign-exchange rates.
What the “fusion” of forex and cryptocurrency means
Forex, or foreign exchange, is the market for trading one fiat currency for another. It is decentralized and includes spot trades as well as derivatives such as forwards, FX swaps, currency swaps, and options. These instruments are used for hedging, funding, and speculation. The International Monetary Fund (IMF) reported average daily FX turnover of more than $9.6 trillion in its October 2025 Global Financial Stability Report. Source: IMF, Global Financial Stability Report, October 2025.
Cryptocurrency is not one uniform category. The Financial Stability Board (FSB) distinguishes unbacked crypto-assets, stablecoins, and decentralized finance (DeFi) as interrelated parts of an evolving ecosystem. A stablecoin aims to maintain a reference value, often against the US dollar; an unbacked crypto-asset does not make that same promise. Neither category is interchangeable with a fiat currency pair traded in FX.
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What the IMF study found about stablecoin flows and FX
An IMF working paper by Iñaki Aldasoro, Paula Beltran, and Federico Grinberg, published March 27, 2026, examined four USD-pegged stablecoins and 27 fiat currencies. The BIS summary describes the study’s coverage as 64 exchanges over 2021–2025. The authors estimate that a 1% exogenous increase in net stablecoin inflows raises deviations from parity by 40 basis points, depreciates the local currency, and widens dollar premiums in synthetic funding markets. Read the IMF working paper; See the BIS working-paper page.
Here, a parity deviation means a gap between the cost of getting dollar exposure through a stablecoin and the cost through traditional spot FX. The paper uses an instrumental-variable approach based on idiosyncratic stablecoin-inflow shocks in other currencies to identify the relationship. This supports a causal interpretation within the study’s design, but the estimates describe the selected stablecoins, currencies, exchanges, and data period—not all tokens, countries, or FX pairs.
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The BIS page states: “Stablecoin activity does not stay confined to the crypto ecosystem.” That is the authors’ working-paper statement about the cross-market mechanism they study, not a universal claim about every crypto asset or market.
How stablecoin demand can spill into traditional currency markets
Price gaps create the channel
Stablecoin-based dollar access and spot FX do not always price identically. If the cost of obtaining dollar exposure through one route departs from parity with the other, there is an incentive to trade across the gap. In practice, market segmentation and other frictions can make that arbitrage slow, costly, or incomplete.
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Intermediaries connect the markets
Firms handling stablecoin trades, conversions, or funding may also participate in conventional FX markets. When net stablecoin demand changes, these intermediaries may need to alter positions in both places. Their balance sheets are finite, so they cannot necessarily absorb or offset every flow without affecting prices or funding costs.
Effects can be stronger when arbitrage capacity is limited
The IMF and BIS accounts report stronger effects when intermediary balance sheets are already stretched. They also find emerging-market currencies more exposed in the studied setting, where parity deviations are larger and arbitrage is weaker. In a counterfactual, halving cross-market frictions would attenuate covered-interest-parity spillovers by roughly one-half and reduce exchange-rate effects by nearly one-third. These are estimates from the paper’s model and sample, not forecasts for an individual country.
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Why forex and cryptocurrency are not equivalent markets
The markets differ in what is traded, how prices form, how trades settle, and which intermediaries and rules apply. A comparison should begin with the instrument rather than treating every crypto product as “digital forex.”
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|---|---|---|
| Instrument | Fiat currency pairs and related derivatives, including spot, forwards, swaps, and options. | May involve a stablecoin, an unbacked crypto-asset, or a DeFi arrangement; these are distinct categories. |
| Venue and intermediaries | A decentralized market with activity across dealers and other participants. | May involve an exchange, on-chain venue, conversion provider, custodian, or other intermediary. |
| Price formation and liquidity | Prices and liquidity reflect FX trading and derivatives markets. | Can reflect token demand, market structure, conversion access, and on-chain activity; the IMF study documents parity gaps for its selected stablecoins and currencies. |
| Settlement and custody | Depend on the FX instrument and counterparties involved. | Depend on the token, platform, custody arrangement, and conversion path. |
| Funding and leverage | Can involve funding and derivative exposures, including FX swaps. | Can involve intermediary funding capacity and exposures linked to exchanges or on-chain activity. |
| Oversight | Depends on the relevant jurisdiction, instrument, and participant. | Depends on the jurisdiction and the roles of exchanges, on- and off-ramps, custodians, and payment platforms. |
The IMF’s $9.6 trillion figure is average daily turnover for the global FX market as reported in October 2025; it is not a directly comparable measure of crypto trading volume. The markets have different coverage and structures, so the figure should not be read as a like-for-like size comparison.
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Why the impact varies by country
Stablecoin flows do not affect every economy in the same way. The IMF identifies several conditions that shape the outcome: the strength of a country’s macroeconomic framework, existing use of foreign currency in place of local currency, market structure, and whether local-currency stablecoins are available.
- Existing foreign-currency use: Stablecoins may substitute for foreign currency people already hold, or they may give new users access to foreign-currency exposure. Those are different effects.
- Who handles conversion and custody: The role of domestic versus foreign intermediaries can influence where flows appear and how they reach local funding or FX markets.
- Where rules apply: Authorities need to consider whether oversight covers exchanges, conversion ramps, custodians, payment platforms, and on-chain conversion points.
The IMF’s August 7, 2026 remarks discuss possible pressure on domestic exchange rates and funding, effects on domestic credit, capital-flow-management measures, data collection, and supervision. They caution against a one-size-fits-all policy response. Applying controls designed for traditional intermediaries can be difficult when activity crosses borders or takes place on-chain.
What the evidence does—and does not—establish
The evidence supports a specific conclusion: stablecoin flows can transmit across market boundaries and affect FX prices or funding conditions under the conditions studied. It does not establish that cryptocurrencies broadly function as fiat currencies, that all tokens affect FX in the same way, or that traditional FX and crypto now form one unified market.
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Quick Recap
Sources and scope
- IMF Working Paper No. 2026/056, “Stablecoin Inflows and Spillovers to FX Markets,” by Iñaki Aldasoro, Paula Beltran, and Federico Grinberg, published March 27, 2026.
- BIS working-paper page for “Stablecoin flows and spillovers to FX markets,” published March 25, 2026.
- BIS, “Cryptocurrencies and decentralised finance: functions and financial stability implications,” published April 15, 2025. The publication notes that its views are those of its authors and do not necessarily reflect the BIS or its member central banks.
- Financial Stability Board, “Crypto-assets and Global Stablecoins,” including its October 16, 2025 implementation-review update.
- Dan Katz, IMF First Deputy Managing Director, “Stablecoins: Promise, Risks, and Policy Choices for Emerging Markets,” remarks delivered August 7, 2026.
- IMF, Global Financial Stability Report, October 2025, Chapter 2, “Risk and Resilience in the Global Foreign Exchange Market.”
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