Japan's benchmark Nikkei 225 index fell 1.06% on Friday, dragged down by a slide in AI-related technology stocks and persistent pressure from elevated global bond yields. The decline was led by SoftBank, which tumbled 5.40% after a Financial Times report raised fresh questions about the growth trajectory of OpenAI, one of its key investments.
What triggered the sell-off?
The immediate catalyst was a report that OpenAI's annualized revenue was roughly $20 billion below what the company had previously signaled. Because OpenAI is privately held, investors often look to publicly traded companies with exposure to the AI boom—such as SoftBank, a major backer—as a way to price in news about the private firm. When doubts emerge about OpenAI's growth, those public stand-ins tend to feel the impact first.
SoftBank's 5.4% drop was the sharpest among Nikkei components, but it wasn't alone. Other AI-exposed suppliers and tech names also lost ground, reflecting a broader reassessment of how quickly the AI sector can deliver the revenue growth that has fueled a massive rally in tech stocks over the past year.
Why bond yields matter
Adding to the pressure were global bond yields, which remained near recent highs. Higher yields make future earnings less attractive to investors, particularly for growth-oriented tech companies that are valued on expectations of strong cash flows years down the road. When yields rise, the present value of those future earnings falls, which can hit high-valuation stocks hardest.
The combination of AI skepticism and higher yields created a one-two punch for equity markets, not just in Japan but globally. Investors have been watching the bond market closely, as moves in U.S. Treasury yields often set the tone for risk assets worldwide. Recent pressure on Treasury yields has been a recurring theme, and Friday's action in Tokyo was no exception.
What it means for investors
For everyday investors, the key takeaway is that AI-related stocks can be volatile when news about private companies like OpenAI surfaces. Even though OpenAI is not publicly traded, its performance has outsized influence on the valuations of companies that have bet heavily on AI, such as SoftBank. This is a reminder that investing in AI-themed stocks carries concentration risk—when sentiment shifts, the swings can be sharp.
Bond yields are another factor to watch. When yields rise, they can weigh on growth stocks across the board, not just in Japan. Cooling yields have helped stabilize some assets in recent sessions, but Friday's move suggests the pressure is far from over.
It's also worth noting that the revenue discrepancy reported by the Financial Times may be a matter of accounting definitions rather than a fundamental deterioration. Different ways of counting revenue can lead to very different numbers, and investors should be cautious about reading too much into a single report. Still, the market's reaction shows how sensitive sentiment has become to any sign that the AI boom might be cooling.
Looking ahead
Investors will likely keep a close eye on both AI-related headlines and bond market moves in the coming sessions. If yields continue to climb, tech stocks could face further headwinds. Conversely, any signs that AI revenue growth is stronger than feared could help stabilize sentiment.
For now, the Nikkei's decline serves as a reminder that even the most popular investment themes can stumble when expectations get ahead of reality. Diversification and a long-term perspective remain essential tools for navigating such volatility.
