On January 21, 2026, the US stock market opened with mixed performance. The Nasdaq Composite Index rose by 0.81%, while the S&P 500 Index fell by 0.47%. The Dow Jones Industrial Average remained relatively flat with a slight increase of 0.10%.

In the sector analysis, Chinese concept stocks showed significant gains. Alibaba rose by 3.04% following the announcement of a joint venture with China National Nuclear Corporation to establish a nuclear energy company. PDD Holdings Inc increased by 2.50% despite being fined 100,000 yuan by Shanghai tax authorities for late tax reporting. Baidu surged by 6.75% as its AI assistant reached 200 million monthly active users.

In the semiconductor sector, Intel saw a notable rise of 6.92% after securing a significant contract from the US Department of War for the SHIELD program. Micron Technology increased by 1.81% following its announcement to acquire a Taiwanese wafer plant for $1.8 billion. Advanced Micro Devices also rose by 3.82% amid mixed performance in big tech stocks.

Netflix experienced a significant decline of 4.75% after announcing the suspension of its share buyback program to fund the acquisition of Warner Bros. The company's cautious Q1 earnings outlook further contributed to the stock's drop.

Apple rose by 0.61% as it announced its strategy for the 2026 iPhone series, including the release of the first foldable iPhone. Microsoft fell by 0.75% despite maintaining an 'Outperform' rating from Mizuho, which lowered its price target from $640 to $620.