U.S. stock market midday update: Navitas down over 10%, governance structure raises market concerns, semiconductor industry volatility intensifies

U.S. Stock Market Midday Update Navitas fell over 10%. Based on recent news, On January 20, Magnachip Semiconductor appointed Cristiano Amoruso as an independent director, who also serves on the board of Navitas Semiconductor. This news may raise market concerns about Navitas' governance structure, leading to stock price fluctuations. Source: Business Wire No other significant news recently. The semiconductor industry has seen increased volatility lately. Top Stocks by Trading Volume in the Industry Nvidia fell 4.11%. Based on recent news, On January 20, Chinese customs suspended the entry of Nvidia's H200 AI chips, causing related component suppliers to halt production. Nvidia originally expected to receive over 1 million orders from Chinese customers, and this move negatively impacts its sales expectations. On January 20, market sentiment towards the AI spending boom became cautious, with investors starting to be more selective in their allocations. Some funds expect AI benefits to spread to other industries, putting pressure on Nvidia's stock price. On January 21, Nvidia invested $150 million in AI startup Baseten. Although this move demonstrates its proactive positioning in the AI field, it failed to boost the stock price in the short term. The AI industry is experiencing differentiation, and market sentiment remains cautious. Micron Technology rose 1.18%. Based on recent key news: On January 19, Micron Technology announced plans to acquire the copper foundry from Powerchip for $1.8 billion to expand its memory chip production capacity. This move will enhance Micron's DRAM capacity and is expected to contribute significantly to production in the second half of 2027, driving the stock price up. On January 20, at least two brokerages raised their price targets for Micron Technology's stock, reflecting market confidence in its future growth, resulting in a 4.1% increase in stock price. On January 19, the global memory chip shortage intensified, with surging AI demand leading to supply-demand tensions. Micron Technology benefited from high bandwidth memory demand, causing its stock price to rise. AI demand is driving activity in the memory chip market, but risks need to be monitored. AMD rose 0.04%, with increased trading volume. Based on recent news, On January 20, the U.S. relaxed its ban on exporting AI chips to China, allowing AMD to sell MI325X chips to China. This move is seen as a significant positive for AMD, driving its stock price up. On January 20, Intel's competitiveness in the server market was insufficient, while AMD's Venice series products performed well in the market, further solidifying its market position and boosting investor confidence. On January 19, KeyBanc analyst John Vinh upgraded AMD's rating to overweight, with a target price of $270, reflecting optimism about its long-term growth in cloud computing and AI The surge in demand for AI and high-performance computing drives market growth. Stocks ranked among the top in industry market capitalization TSMC fell 4.25%. Based on recent news, On January 19, TSMC's stock price hit a historic high of NT$1780, but foreign capital sold off NT$28 billion against the trend, indicating market concerns about overvalued stocks. The rise in TSMC's stock price triggered a divergence in market sentiment, with foreign capital reducing positions putting pressure on the stock price. On January 20, TSMC's stock price frequently reached new highs after the earnings call, rising for three consecutive days. The earnings call released an optimistic outlook, estimating that first-quarter revenue will reach a new high, driving the stock price higher. On January 20, Deutsche Bank raised TSMC's target price to NT$2200 due to the surge in AI demand, reflecting market confidence in TSMC's future growth potential and attracting investor attention. Technology stocks performed strongly, with significant capital inflow