Japanese equities added roughly ¥23.6 trillion — about $150 billion — in market value in a single session as the Nikkei 225 surged 2%, extending one of the strongest runs global markets have seen this year. The move builds on a rally that has already pushed the benchmark index up more than 56% from where it stood twelve months ago.
The latest leg higher tracks a pattern that has defined Japanese equities through much of 2026: heavy foreign buying, a weaker yen steering capital toward exporters and financials, and an enthusiastic bid for AI-linked names. According to market analysis from Vantage Markets, the index has traded within reach of record territory in recent sessions, with a burst of AI enthusiasm and a strong run on Wall Street both feeding into the advance.
Foreign Capital Keeps Arriving
Overseas investors have been net buyers of Japanese equities for a sustained stretch this year, a dynamic reinforced by the Bank of Japan's policy stance and the yen's persistent weakness against the dollar. That combination has made Japanese exporters and financial stocks unusually attractive to foreign capital hunting for growth exposure outside the U.S. market, even as the index has given back some ground on individual down days.
Related: Hedge Funds Slash Yen Short Bets After US-Japan FX Intervention
Currency Policy Still the Wildcard
The rally isn't happening in a vacuum. Japanese policymakers have intervened repeatedly this year to manage the yen's slide, and speculative positioning against the currency has shifted meaningfully as a result — hedge funds have already pared back bearish yen bets following coordinated intervention efforts. Any renewed currency volatility could just as easily reverse the capital flows currently supporting equities as extend them.
For now, though, the trend remains firmly in the bulls' favor. A single-day gain of $150 billion in market value is a reminder of how much momentum foreign buying has injected into Tokyo's markets this year, even if the pace of gains eventually cools.
