The stock market is up today primarily due to strong momentum from the artificial intelligence (AI) sector, especially fueled by Nvidia's impressive earnings report showing a 56% increase in quarterly revenue, which confirmed ongoing strong demand for AI technology. This has driven major tech stocks like Alphabet, Amazon, and Broadcom higher, boosting investor confidence that AI is the main structural driver behind the market rally in 2025. Despite some mixed earnings from other companies, the overall market sentiment remains bullish with expectations of continued AI-driven growth. Additionally, positive economic indicators such as a surprising 3% GDP growth in the second quarter and low jobless claims also support the market's strength. Investors are now awaiting key inflation data which is adding a cautious tone but hasn't dampened the broad enthusiasm for AI-related stocks and the overall market gains.