S&P 500 climbs for best day since early June as Nvidia shares lead tech turnaround

That’s great news for investors! The S&P 500 is a market-cap-weighted index of 500 of the largest companies listed on the U.S. stock exchanges, covering about 80% of the American equities market. This makes it a significant indicator of the overall market health.

Its strong performance likely reflects increased investor confidence, balance in market sectors, or notable performances of individual companies within the index. For this specific case, Nvidia, a leading graphic processing unit and artificial intelligence technology company