Yen Intervention Has Contained Effect on Emerging Markets Amid Shift to Multi-Currency Funding

The US and Japan's joint intervention to buy yen in August 2024 was met with anticipation of significant market impact, but instead had a contained effect on emerging markets. The Bloomberg EM FX Carry Risk Premia Index dropped roughly 1% after the move, which is significantly less than the 4% decline seen during the August 2024 yen rally.

The coordinated intervention marked the first time in nearly three decades that the two countries have worked together to stabilize global finance. US Treasury Secretary Scott Bessent and Japan's Finance Minister Satsuki Katayama framed the move as necessary to maintain stability amid rising exchange rate volatility.

Carry traders had relied heavily on yen borrowing, but after the sharp yen rally in August 2024, they began shifting towards funding currencies like the euro and Swiss franc. This diversification severed the direct transmission mechanism between yen intervention and EM asset prices, resulting in a manageable pullback rather than a cascading liquidation event.

The shift has implications for stablecoin markets and DeFi yield strategies, as many institutional players who participate in traditional carry trades also allocate to on-chain opportunities. When traditional carry trades blow up, on-chain positions get cut too, indicating a more resilient ecosystem for crypto portfolios.