Onome Amuge
The $10 trillion-a-day foreign exchange (FX) market, the world’s largest and most liquid, is undergoing a transformation that could reshape the way global liquidity and financial risk are managed. A new report by the International Monetary Fund (IMF) warns that the rise of nonbank financial institutions (NBFIs) at the heart of currency trading is subtly shifting the system’s dynamics, making it more efficient in calm periods but potentially more fragile when turmoil hits.
The analytical chapter of the IMF’s Global Financial Stability Report highlights an FX market increasingly dominated by asset managers, hedge funds, and institutional investors rather than traditional banks. The Fund argues that while these players have deepened liquidity and expanded participation, they have also introduced new forms of systemic vulnerability, especially in periods of macroeconomic uncertainty.
Over the past decade, post-crisis regulatory reforms have fundamentally transformed the structure of currency markets. Stricter capital and liquidity requirements compelled banks to curtail proprietary trading and reduce balance-sheet exposures. As a result, nonbank institutions—subject to comparatively lighter oversight, have emerged as key intermediaries in the intricate network of global currency flows.
This migration has coincided with a technological revolution in trading. Algorithmic execution, high-frequency strategies, and electronic platforms have made transactions faster and cheaper, but also more interconnected and opaque.
The IMF acknowledges these innovations have made markets deeper and more efficient under normal conditions. Yet it cautions that the liquidity provided by NBFIs is elastic and procyclical, abundant in good times, but quick to evaporate when shocks strike.
“Nonbanks have become indispensable providers of liquidity, but their behavior under stress can transform volatility into systemic instability,” the report notes.
According to the Fund’s research, global uncertainty tends to spark sudden increases in demand for the U.S. dollar, a phenomenon now fueled more by NBFIs than before. As volatility intensifies, foreign investors gravitate toward the safety of dollar assets, much as they did at the start of the pandemic in March 2020.
The IMF estimates that non-U.S. investors increase dollar purchases by about 24 percentage points following sharp spikes in financial uncertainty, using the volatility of U.S. stock options as a proxy. That increase, it says, was “especially strong among nonbank institutions,” which use foreign exchange derivatives and swaps to hedge portfolios or secure dollar funding.
The resulting stress manifests through widening cross-currency bases, a measure of the cost of swapping currencies. When this spread widens, it signals scarcity in dollar funding, often rippling through global funding markets. The phenomenon is particularly notable in emerging markets, which lack the deep liquidity buffers and access to dollar swap lines that advanced economies enjoy.
“This is the paradox of modern finance. The same institutions that make markets function more smoothly in good times can withdraw liquidity instantly, leaving smaller markets gasping for dollars,” said one senior IMF official familiar with the analysis.
The IMF’s analysis gains urgency amid the latest bout of geopolitical and economic tension. After the United States announced a new wave of tariffs in April, the Fund observed patterns both familiar and novel. This includes a rise in dollar demand, though more muted than during the pandemic, and more persistent hedging by nonresident investors wary of further shocks.
Interestingly, the data showed cross-country divergence in reactions. Some economies became net sellers of dollars, seeking to hedge against potential dollar depreciation, while others hoarded greenbacks. This shift, the IMF argues, reflects an evolving global landscape in which traditional safe-haven behavior is fragmenting under the weight of shifting trade alliances and policy uncertainty.
The Fund warns that currency market stress rarely stays isolated. Rising hedging and funding costs can ripple through financial systems, altering asset prices and tightening global liquidity conditions. When foreign exchange swaps become more expensive, institutions that rely on them to manage cross-border exposures (such as pension funds and insurers), face higher costs. That, in turn, can push up yields on bonds and risk premiums across markets.
The IMF cautions that these dynamics can be especially harmful in countries with high public debt or mismatched currency exposures, where financial institutions hold assets in local currency but liabilities in dollars or euros. In such cases, a widening cross-currency basis can rapidly morph into a balance-sheet crisis.
“The interconnection between FX markets and broader financial conditions has become a key channel of contagion. When funding markets seize up, the ripple effects can quickly undermine credit availability and amplify sovereign risks,” the Fund warns.
Beyond market behavior, the IMF raises concerns about operational fragility, a growing vulnerability in the digital age of 24-hour trading. Technical failures, cyberattacks, or settlement delays, it noted, can trigger liquidity shocks that mirror financial stress events, even in the absence of economic triggers.
The Fund’s data shows that even brief outages in major trading platforms can significantly impair liquidity, widening spreads and increasing price volatility. Meanwhile, settlement risk, the danger that one party delivers a currency without receiving the counterpart payment, remains an unsolved problem in many emerging markets.
Without access to Payment-versus-Payment (PvP) systems, many developing economies are seen to face a structural disadvantage, where operational disruptions can instantly translate into exchange rate instability.
The IMF called for urgent action to fortify the architecture of global foreign exchange markets. Its policy recommendations extend beyond traditional regulation to encompass data transparency, crisis management, and technological modernisation.
Key proposals include enhancing surveillance and disclosure through more granular data collection on NBFI activities and derivative exposures; implementing liquidity stress tests for both banks and nonbanks under multi-currency, real-world shock scenarios; strengthening capital and liquidity buffers to guard against dollar funding shortages; prioritising investment in cybersecurity and operational resilience across exchanges and settlement systems; and modernising settlement infrastructure by expanding simultaneous settlement arrangements to reduce counterparty and settlement risks.
“The FX market may be the deepest in the world,but its very scale and complexity demand stronger safeguards,” the IMF noted.
