In a momentous trading session, the S&P 500 and the Nasdaq 100 indices both reached new record highs, driven by growing investor confidence in the expansion of artificial intelligence-driven growth from the tech sector into the broader market. The S&P 500 Index, tracked by the SPDR S&P 500 ETF Trust (SPY), closed at an impressive 5,354 points, surpassing the previous all-time high close of 5,321 points set on May 21. Simultaneously, the Nasdaq 100 Index, monitored through the Invesco QQQ Trust (QQQ), closed at an all-time high of 19,035 points, a 2% increase for the day and its best daily performance in a month.

The astounding achievement of reaching these record levels was driven, in part, by the Magnificent Seven group of companies—Microsoft Corp. (MSFT), Alphabet Inc. (GOOG, GOOGL), Amazon Inc. (AMZN), Meta Platforms Inc. (META), NVIDIA Corp. (NVDA), and Tesla, Inc. (TSLA). Together, they have accumulated a staggering combined market valuation of $15 trillion, nearly half the size of the remaining companies listed on the S&P 500.

Notably, NVIDIA made waves by surpassing a valuation of $3 trillion, overtaking Apple Inc. to become the second most valuable company in the United States. This milestone demonstrates the growing prominence and market confidence in NVIDIA's advancements in the field of artificial intelligence.

Investors have shown high optimism about the future growth potential of AI technology, leading to increased market capitalization for companies like NVIDIA. The tech sector, particularly AI-focused companies, has experienced significant growth over the past months, contributing to the overall upward trend in the stock market.

The strong performance of both the S&P 500 and the Nasdaq 100, along with NVIDIA's historic leap in market value, highlights the bullish sentiment prevailing in the market. Investors continue to show confidence in the tech sector's ability to drive innovation and deliver strong financial results.

Market analysts anticipate that this surge in market value and confidence may encourage further investment and spur additional growth in the tech sector and the broader market as a whole. The record-breaking levels achieved by the S&P 500 and the Nasdaq 100 symbolize renewed investor optimism and suggest positive market trends as we enter a new phase of economic recovery.

Disclaimer: The information in the article is based on the provided context and may not include additional updates or developments.