Japan's Nikkei index gave up an early gain and finished 0.7% lower on Tuesday, as a sharp after-hours drop in US chip giant Nvidia rippled through Tokyo's technology shares. The move came after reports that Nvidia's board is weighing whether to remove CEO Jensen Huang, a headline that hit the AI-chip leader hard in extended US trading.
Nvidia sank more than 8% after hours, and the selling quickly spread to other markets. Because US stock exchanges were closed at the time, the fastest reaction came through derivatives: Nasdaq futures fell close to 1% during Asian hours. That kind of move tends to spill into the most liquid, high-sensitivity tech names overseas, especially those seen as tied to Nvidia's fortunes.
What happened in Tokyo
In Tokyo, the damage was concentrated in chip-adjacent names. Testing-equipment maker Advantest fell 4.64%, while electronics maker Ibiden dropped 8.32%. These companies are part of the semiconductor supply chain and are often viewed as proxies for Nvidia's business, so they can move sharply on US tech headlines even without fresh local news.
The broader TOPIX index, which includes a wider range of companies, was steadier. Strength in non-tech heavyweights helped cushion the blow: Sony rose 1.93%, and Japan Tobacco jumped 7.8%. That divergence highlights how a single US headline can hit one part of the market while leaving others relatively unscathed.
Why Nvidia's move matters
Nvidia has become one of the most influential stocks in global markets, thanks to its dominance in AI chips. When it moves sharply, investors around the world take notice. But because US markets were closed, the first place the move showed up was in futures and overseas-listed stocks that trade around the clock.
For everyday investors, the key takeaway is that global markets are more connected than they might seem. A report about a US company's leadership can move stock prices in Tokyo, Seoul, and elsewhere before Wall Street even opens. That's why you might see Japanese chip stocks fall on news that has nothing to do with Japan.
The report, first published by The Wall Street Journal, said Nvidia's board is considering whether to remove Jensen Huang. Reuters later cited a source saying the board is meeting to decide on his future. Neither report has been confirmed by Nvidia, and the company has not commented publicly.
What it means for investors
For investors holding Japanese tech stocks, this episode is a reminder of how sensitive the sector can be to US news flow. Even if a company's fundamentals are solid, its share price can swing on headlines from across the Pacific. That's especially true for firms that supply components to Nvidia or compete in the same AI chip space.
For those with broader market exposure, the divergence between the Nikkei and TOPIX shows the value of diversification. While tech-heavy benchmarks can be volatile, a wider index that includes consumer, tobacco, and other sectors may hold up better when tech stumbles.
Looking ahead, investors will be watching for any official statement from Nvidia's board. If the leadership question is resolved quickly, the selloff could fade. But if uncertainty lingers, chip stocks around the world may stay on edge. The Nvidia board report is still developing, and markets will likely react to each new detail.
In the meantime, the Nikkei's day-to-day swings may continue to look more tied to US tech headlines than to Japan's own economic data. That's not unusual in a globalised market, but it's worth keeping in mind when trying to understand why your portfolio moved on a given day.
For a broader view, the KOSPI's reaction in South Korea showed a similar pattern, with chipmakers initially rallying before the Nvidia reports clouded the AI trade. And in New Zealand, the NZX 50 rose, showing that not all markets were affected equally.
As always, the best approach for most investors is to focus on long-term fundamentals rather than short-term headlines. A single news story, even about a company as important as Nvidia, rarely changes the underlying investment case for a diversified portfolio.
