Nikkei Storms 3.7% Higher to 66,300 as AI Chip Rally Ignites SoftBank; Short-Sell Ratio Eases to 41.8%

The Nikkei 225 jumped 2,342.91 points to 66,300.44 on Wednesday as an overnight surge in US chip names lit up Tokyo’s AI complex. SoftBank Group soared 13.96%, Advantest 8.77%. The TSE short-selling ratio eased to 41.8% — still defensive, but the least so in three sessions.

Nikkei Slips 0.6% as Intervention Shadow Weighs on Exporters; Chip and Heavy-Industry Names Power a Split Tape

The Nikkei 225 closed at 63,957.53, down 0.63%, while the TOPIX proxy edged higher — a split tape as semiconductor-equipment and heavy-industry names surged against weakness in banks, exporters and index heavyweights. Short selling stayed elevated at 45.3% of TSE turnover.

Nikkei Slides as Japan-US Yen Intervention Bites; Fanuc Plunges, Volatility Spikes

The Nikkei 225 fell 0.94% to 63,754.90 on Monday as a confirmed joint Japan-US yen-buying intervention sent the dollar down 2.12% to 156.79, pressuring exporters. Fanuc cratered 14% on heavy volume, the TSE short-selling ratio held at an elevated 45.4%, and the Nikkei VI jumped to a stressed 35.50.

Japan Yen Intervention 2026: How MOF Orders It, BoJ Executes, Signals to Watch

Japan’s Ministry of Finance decides currency intervention and the Bank of Japan merely executes it, funded from the Foreign Exchange Fund Special Account. Traders track a three-step escalation — scripted verbal warnings, rate checks, then actual yen-buying — and confirm operations after the fact through MOF’s monthly disclosures and BoJ current-account projections. Here is the full mechanism.

Nikkei Fades as Yen Breaks 163: Banks Lead a Split Tape, Short-Sell Ratio Hits 43%

Tokyo surrendered an early tech-led rally on Tuesday, with the Nikkei 225 slipping 0.18% to 66,115.60 while banks and trading houses pushed TOPIX higher. The yen sank to 163.05 per dollar, JGB yields ground higher, and the TSE short-selling ratio jumped to 43.0% — the top of its recent range.