What is proxy hedging and when is cross-currency hedging used?

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AcadiFi · Accepted Answer

Proxy hedging — also called cross-currency hedging — uses a liquid, cheaper currency to hedge exposure in a less liquid or more expensive one. Rationale: when a target currency's forward points are prohibitively costly (wide bid-ask, capital controls, restricted NDF markets), a correlated substitute may achieve much of the hedge at lower cost. Classic case: a US investor holding Korean equities wants to hedge KRW exposure. KRW is a restricted NDF market with 10-20bp monthly roll costs. JPY has historically correlated 0.6-0.8 with KRW (common Asian risk-off dynamics, trade linkages). Hedging via short JPY forwards captures roughly 60-70% of the risk reduction at one-quarter the cost. Trade-offs: (1) basis risk — correlation is imperfect, so the hedge can diverge materially during idiosyncratic shocks (e.g., North Korea geopolitical event moves KRW but not JPY); (2) correlation instability — historical correlations can break during crises; (3) additional exposure to the proxy currency's own drivers (JPY safe-haven behavior affects the hedge); (4) governance complexity — explaining a JPY position hedging KRW exposure to a committee takes work. Best practice: size proxy hedges by regression beta (often below 1.0), monitor residual correlation over rolling windows, and maintain tolerance for tracking error. Proxy hedging is common for EM baskets — hedge aggregated EM exposure via index forwards or a basket of G10 proxies rather than individual EM pair hedges. Documentation in the IPS should authorize cross-hedging, define acceptable proxies, and set limits on correlation deterioration before replacing proxies.

What is proxy hedging and when is cross-currency hedging used?

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