Nikkei 225 Hits All-Time High as Yen Weakness Fuels Rally

Japan's Nikkei 225 surged to a record high on May 27, 2026, as a weak yen and robust corporate earnings drew heavy buying. The benchmark index cleared its previous peak, extending a multi-year climb driven by overseas demand for exporter stocks. The yen's sustained decline against the dollar magnifies profits for automakers and electronics firms, which dominate the index. Combined with aggressive share buybacks and improving governance, the favorable currency backdrop has lured strong foreign inflows. The Bank of Japan's ultra-loose policy has also supported equities by keeping borrowing costs low. While the milestone reinforces bullish sentiment, some strategists warn that stretched valuations leave the market vulnerable to a sudden yen reversal or global growth slowdown. For now, the record close underscores investor confidence in Japan's corporate revival.