The S&P 500 and the tech-heavy Nasdaq index both reached record closing highs in the most recent trading session. The S&P 500 rose 0.58%, surpassing the 7,800-point threshold for the first time, while the Nasdaq climbed 0.45%. The Dow Jones Industrial Average also saw gains, rising 0.49%, though it remains slightly below its August peak.

The primary catalyst for the market's upward movement was a surge in the valuation of major AI chipmakers. Specifically, investors responded positively to growth indicators from companies including Marvell Technology, Advanced Micro Devices (AMD), and Broadcom. These firms are central to the infrastructure required for artificial intelligence development. Market analysts also pointed to a decline in US treasury yields as a contributing factor that bolstered investor confidence. While the broader market sentiment remains optimistic, the current rally is heavily concentrated in the technology and semiconductor sectors, which have been the primary drivers of the indices' recent performance.