Nvidia's stock has faced a significant downturn, declining nearly 14% over a volatile week, exacerbated by the company's CEO selling over $633 million in shares and a broader market sell-off in the semiconductor sector. The decline follows concerns over future tech infrastructure spending and the Federal Reserve's interest rate decisions. Nvidia's market value dropped by almost $300 billion after a disappointing quarterly report and news of a Justice Department antitrust investigation. Other semiconductor firms, such as Intel and Broadcom, have also faced challenges, including cost-cutting measures and sales forecast misses. Despite these setbacks, Nvidia remains a dominant player in the AI chip market, with significant stock buybacks and ongoing partnerships with major tech firms.