Nikkei 225 Falls on AI Regulation Fears

The benchmark briefly slipped below 61,000 yen for the first time since July 29, after opening down 108 yen and then accelerating lower as selling spread through Advantest, SoftBank Group and Tokyo Electron. Those three stocks alone dragged the Nikkei down by more than 1,200 points, underscoring how concentrated the market’s AI exposure has become.

U.S. stocks were already weaker overnight, with the Dow Jones Industrial Average ending 0.38% lower after Apple and materials names sold off following earnings. But the bigger driver in Tokyo was election risk, with investors watching whether Democrats could use a stronger showing to push for stricter AI rules.

That concern comes as the Democratic Party appears to have won key Senate contests in Georgia and New Hampshire, taken a seat from Republicans in North Carolina and been projected to win in South Carolina as well. CNN and NBC also reported that Democrats had secured the House, a result that would give them more leverage on technology policy even if Republicans keep a grip on parts of Congress.

For investors, the immediate question is whether the selloff stays confined to Japan’s AI leaders or broadens into a wider de-risking move. The Nikkei’s 50-day moving average and momentum indicators had already pointed to a stretched market, and Wednesday’s drop pushed the index deeper into oversold territory.

The yen was little help as a shelter, with market gauges still showing elevated attention on the currency and investors keeping one eye on U.S. political risk. If the election count confirms a split Congress, pressure on AI regulation fears could ease; if Democrats extend their gains, traders say the next leg lower in chip stocks could be swift.