Nikkei Falls as Rising Yields Hit AI and Chip Shares

Tokyo's Nikkei 225 stock index experienced a decline on August 24, closing at 65,528.09, marking a 0.74% decrease or 488.27 points. The primary catalyst for this drop was rising global bond yields and a lack of confidence ahead of Nvidia's earnings report. The broader TOPIX index managed to climb by 0.15%, or 6.00 points, reaching 4,073.29, indicating that the Nikkei's decline was primarily concentrated in technology and AI-linked components.

Trading volume for the day amounted to approximately 1.88234 billion shares, with 843 stocks experiencing an increase, 662 displaying a decrease, and 51 remaining unchanged. The Nikkei index began the day slightly lower at 65,978.95 before briefly reaching 66,257.73 before ultimately falling in the afternoon, hitting an intraday low of 65,470.95 before finally closing near that level.

The decline was attributed to the market's vulnerability to a small group of AI and semiconductor-related shares, while the TOPIX continued to receive support from materials, machinery, retailers, shipping, and certain domestic-demand stocks. The recent decline in the Nikkei followed a week of cautious global investor sentiment towards growth stocks due to rising long-term interest rates.

Higher yields reduce the attractiveness of equities and place additional pressure on technology companies whose valuations depend on future earnings growth. Semiconductor shares faced additional caution due to investors' concern over Nvidia's upcoming earnings announcement later in the week. This sentiment spread to Japanese shares, despite the Dow, S&P 500, and Nasdaq all rising.

The South Korean market further contributed to the negative sentiment. Kioxia Holdings, a major decliner with a 6.24% drop to 50,930 yen, is a key gauge of confidence in AI servers, high-bandwidth memory, and data-center demand. SoftBank Group, another significant decliner with a 5.32% decrease to 4,975 yen, serves as a proxy for global AI investment sentiment through its exposure to OpenAI, robotics, and digital infrastructure.

Advantest also saw a 3.89% drop to 34,500 yen. The decline extended to data-center infrastructure names like Furukawa Electric and Fujikura, both falling by 5.05% and 5.00%, respectively. The market-wide weakness indicated that investors were reducing exposure to AI-related risk, not only in semiconductor hardware but also in companies with high valuations or demanding earnings expectations.

Some companies, such as Tokyo Electron, Disco, and Hitachi, remained firm, while several machinery and materials names attracted buying. The TOPIX's resilience reflected strength in non-AI-heavy sectors, including materials, machinery, retailers, shipping, and selected domestic-demand stocks.