Intermediary Specialization and Risk Drive Covered-Interest Parity Deviations
Analysis of daily bank exposures reveals major structural frictions in currency swap markets.
1Challenging Frictionless Intermediation Models
Traditional financial intermediation models assume integrated sectors with frictionless risk-sharing across global markets. However, empirical analysis of currency derivatives shows substantial structural frictions. These frictions undermine standard market-clearing assumptions, revealing that risk does not disperse evenly among global banks managing cross-border currency exposures.
2Supervisory Data Exposes Exposures
Researchers analyzed confidential supervisory data covering $25 trillion in daily bank exposures across major institutions. This detailed dataset allowed researchers to track exact trading positions and balance sheet commitments, providing an unprecedented view into how global intermediaries manage synthetic dollar lending and daily FX risks.
3Pervasive Imperfect Hedging Practices
The empirical findings document systemic imperfect hedging across banks' foreign exchange swap intermediation activities. Specifically, dealer banks rarely hedge synthetic dollar lending by holding maturity-matched foreign safe assets. This mismatch leaves intermediaries exposed to residual risks that standard macro-finance models traditionally assume away.
4Intermediary Specialization Dynamics
Financial intermediaries do not operate as generalized market makers across all currency pairs. Instead, banks actively specialize in specific markets where they possess distinct risk-management expertise. This operational focus determines how balance sheet capacity is allocated and which currency risks an intermediary is willing to warehouse.
5Explaining Parity Violations
Specialized intermediation directly drives cross-market variations in covered-interest parity deviations. Because institutions cannot seamlessly transfer risk across segmented currency segments, arbitrage limits persist. The resulting pricing dislocations reflect idiosyncratic balance sheet constraints rather than simple liquidity shortages or standard transaction costs.
6Risk Premia and Balance Sheets
These findings directly link intermediary risk premia to the internal operational constraints of specialized dealers. When specialist banks reach capacity limits in specific currency pairs, price adjustments occur. Consequently, cross-currency basis spreads widen because alternative non-specialist intermediaries cannot easily absorb the excess order flow.
7Implications for Regulatory Policy
Regulators evaluating systemic stability must look beyond aggregate sector capital and assess market-specific intermediary concentration. Macroprudential policies that assume frictionless cross-market liquidity transfers risk miscalculating funding vulnerabilities. Effective oversight requires monitoring specialized balance sheet capacities across individual currency derivative segments rather than sector-wide averages.
8Rethinking Modern Asset Pricing
The research establishes that intermediary heterogeneity is a fundamental determinant of asset prices in international finance. Models must incorporate institutional specialization and localized risk-bearing capacity to accurately forecast currency swap spreads. Understanding these frictions is essential for evaluating global liquidity dynamics and monetary transmission.