Emerging-market currency volatility has surged above developed-market peers for the first time since May, breaking a record 209-day lull. JPMorgan's EM volatility index rose above the Group-of-Seven gauge on Tuesday as Brent crude hit its highest level since July 2024 amid escalating Middle East tensions. The shift marks a dramatic reversal from months of relative calm in emerging-market currencies.

South Korea's won suffered its largest single-day loss since 2009 on Wednesday, with the Kospi index experiencing a record drop. StoneX Financial's Mingze Wu attributed the volatility to Middle East tensions and second-order effects from Asian equity market swings. Nearly all emerging-market currencies have fallen against the dollar this week, driven by risk-off sentiment and surging oil prices.

Despite the recent spike, analysts note the broader backdrop remains supportive for emerging markets. Strong commodity prices and robust capital inflows have sustained demand for EM assets, while the greenback has been weakening. BNY's Wee Khoon Chong emphasized that oil prices are the key driver of recent volatility, with potential de-escalation in Middle East tensions likely to reduce emerging-market currency swings.