U.S. Stocks Close Higher as Alphabet Joins Dow, Tech Sector Rebounds

U.S. stock markets experienced a broad rally on June 29, with all major indices closing in positive territory. The optimistic sentiment was fueled by a de-escalation of tensions between the United States and Iran over the weekend, alongside a robust recovery in the technology sector.

A significant driver of the day's gains was Alphabet, the parent company of Google, which officially joined the Dow Jones Industrial Average. The tech giant's stock price jumped nearly 5% on its first day as a Dow component, helping to push the blue-chip index to a new historical high of 52,182.74 points.

Other major technology stocks also performed well. Meta saw a gain of 2.24%, Amazon rose by 3.20%, and AMD increased by 3.43%. Nvidia and Broadcom also contributed to the tech sector's strength with gains of 1.27% and 2.04%, respectively. However, some tech giants experienced slight pullbacks, with Apple down 0.72% and Microsoft falling 1.18%.

The Nasdaq Composite index recorded a substantial increase of 2.07%, closing at 25,820.14 points. The S&P 500 index also climbed, adding 1.18% to reach 7,440.43 points. The semiconductor sector showed particular strength, with the Philadelphia Semiconductor Index surging by 3.83% to 13,709.66 points. Additionally, Taiwan Semiconductor Manufacturing Company's ADR (American Depositary Receipt) saw a significant jump of 5.26%, closing at $455.10.