Economy

Global AI Stocks Fall on Valuation Concerns; SoftBank Shares Plunge

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Nov 5, 2025

THE BARE STORY

Shares in technology and artificial intelligence-related companies fell globally this week amid growing investor concerns over high valuations. On Wednesday, Japan's SoftBank Group saw its shares close 10% lower, erasing approximately $23 billion from its market capitalization in what was reportedly the company's most significant single-day drop since April.

The decline in Asia followed a downturn in U.S. markets. On Tuesday, the S&P 500 fell over 1% and the Nasdaq Composite dropped nearly 2%, pressured by tech stocks. The sell-off continued into Wednesday's session in Asia, affecting numerous companies. In Japan, Advantest fell over 5%, while Renesas Electronics and Tokyo Electron lost more than 4%. South Korea’s Samsung Electronics and SK Hynix dropped 4.1% and 1.19% respectively, and Taiwan’s TSMC declined 2.99%.

In the U.S., Arm Holdings, in which SoftBank has a controlling stake, saw its shares drop 4.71% overnight. Software company Palantir fell about 8% despite, according to one summary, exceeding third-quarter expectations. Other U.S. tech firms including Oracle, AMD, Nvidia, and Amazon also experienced declines. According to data from FactSet, the S&P 500’s forward price-to-earnings ratio has risen above 23, its highest level since 2000, fueling concerns of a potential tech bubble.

Market observers expressed varied opinions on the downturn. Jared Bernstein, a former head of the Council of Economic Advisers, was cited as saying the gap between AI investment and earnings potential "certainly looks bubbly." It was also revealed that Michael Burry’s Scion Asset Management holds short positions against Palantir and Nvidia, according to one of the summaries. In contrast, Dan Ives of Wedbush was quoted as believing the sell-off is "short lived" and not indicative of a structural decline.

Same Facts. Different Perspectives.

Two AI models. Two viewpoints. One factual foundation.

Perspective by Claude

• The market is exhibiting signs of a potential tech bubble. The S&P 500’s forward price-to-earnings ratio has risen above 23, its highest level since the year 2000, which is fueling concerns among investors. This high valuation is seen as a key factor behind the recent global sell-off in technology and artificial intelligence-related stocks.

• High-profile figures are expressing caution and betting against the sector. Jared Bernstein, a former economic adviser, was cited as saying the gap between AI investment and earnings potential "certainly looks bubbly." Additionally, it was revealed that Michael Burry’s Scion Asset Management holds short positions against prominent AI companies Palantir and Nvidia, indicating a belief that their stock prices will fall.

• The downturn reflects a broad, international market correction. The sell-off was not limited to one region, indicating widespread investor re-evaluation. Following declines in the U.S. S&P 500 and Nasdaq, major technology firms in Japan, South Korea, and Taiwan—including SoftBank, Samsung Electronics, and TSMC—also experienced significant share price drops.

How it may affect me

As a U.S. reader:

• Your retirement and investment accounts holding tech stocks or S&P 500 index funds may have decreased in value due to the reported market sell-off.

• If the sell-off signals a "tech bubble," as some analysts suggest, it could point to a risk of wider, long-term economic instability affecting the broader market.

• Alternatively, the downturn could be a short-lived event, meaning the value of investments may recover without any significant, lasting impact on the economy.

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