Japan’s benchmark Nikkei 225 index plunged to its worst weekly performance in over six years, closing down 9.3% for the period ending November 6, 2026, as a brutal tech sell-off in Wall Street spilled over into Asian trading floors amid mounting fears of regulatory roadblocks for artificial intelligence infrastructure.
Nikkei 225 Drops as Government Bond Yields Fall
- Market Fallout: The Nikkei 225 dropped 6% on Friday to finish at 57,434.77, with 222 of its 225 component stocks declining.
- Yield Compression: Investors rushed into safe-haven government debt, driving the 10-year Japanese Government Bond yield down 14.5 basis points to 2.61%.
Tech Sell-Off Triggers Historic Weekly Drop
According to Asharq Al-Awsat, the Nikkei 225 suffered its largest daily decline since April 2025 during the worst of the sell-off.
The damage was virtually absolute across the index. Out of 225 issues, 222 retreated while only three managed marginal gains. AI bellwethers bore the brunt of the institutional liquidation. Startup investor SoftBank plummeted 10.8%, while chip-testing equipment manufacturer Advantest dropped 5%. Meanwhile, broader indices mirrored the carnage, with the broader TOPIX index sliding 5.9% as all 33 of its industrial sector sub-indexes moved into negative territory.
Diverging Outlets Paint a Complex Market Picture
Al Jazeera noted that the market had initially pared losses earlier in the week after unexpected, conciliatory remarks from US President Donald Trump following the midterms prompted traders to unwind worst-case scenario hedges. However, by Friday, Investing.com confirmed that the Nikkei 225 closed down 6.04% in Tokyo, accompanied by a 34.35% spike in the index volatility gauge to 33.56, signaling intense defensive positioning.
Maki Sawada, strategist at Nomura Securities, warned that markets remain highly vulnerable to intermittent turbulence driven by rising AI infrastructure costs and deployment delays. The markets may shift from a broad-based rally to a more selective approach based on individual company performance,
Sawada noted. Supporting this thesis, specific industrial names diverged wildly from the tech rout; Daikin Industries gained 1.51% to close at 21,790.00, while Japan Tobacco tumbled 19.31%.
| Asset / Index | Metric / Change | Noteworthy Movement |
|---|---|---|
| Nikkei 225 Index | 57,434.77 (-6.0% Daily) | Worst weekly loss (-9.3%) since March 2020 |
| TOPIX Index | -5.9% Daily Decline | All 33 sector sub-indexes closed lower |
| 10-Year JGB Yield | 2.61% (-14.5 bps) | Touched lowest level since June 26 |
| USD/JPY Exchange Rate | 158.12 (+0.27%) | Modest dollar strength amid flight to safety |
Bond Yields Compress as Monetary Policy Expectations Shift
As equity portfolios experienced systemic unwinding, capital rotated aggressively into sovereign debt. The rally in Japanese Government Bonds pushed yields down to multi-month lows as investors priced in a shifting macroeconomic backdrop. The severe market instability forced traders to reevaluate the timing of potential monetary tightening by the central bank. Current overnight swap pricing indicates a probability that the Bank of Japan will maintain interest rates unchanged at its December meeting, overshadowing the lingering expectation for a hike.
Yusuke Matsuo, senior market economist at Mizuho Securities, emphasized that prolonged financial market friction ties the central bank’s hands. The incentive for the Bank of Japan to adopt a wait-and-see approach will grow stronger,
Matsuo explained. Consequently, the benchmark 10-year JGB yield retreated 14.5 basis points to 2.61%, marking its lowest print since late June. Shorter-duration debt exhibited even sharper compression, with the 2-year yield dropping 13.5 basis points to 1.72%. Only longer-duration bonds resisted the trend; 20-year and 30-year yields saw muted declines of 8.5 and 4 basis points respectively, anchored by lingering energy inflation concerns tied to Brent crude holding near $91.41 per barrel.
