The S&P 500 and Nasdaq Composite Indexes rose for a fourth straight session on Tuesday.
The gains were supported by investor optimism as tech giants awaited earnings reports and an update from the Federal Reserve (Fed) on interest rate policy this week.
Both major indexes hit their highest levels in more than a week, marking their longest rally since December last year.
Tech giants were the main contributors to the S&P 500's strength, with Apple, Microsoft, Alphabet, Meta, and Broadcom providing the biggest boost to the benchmark index.
In addition, quarterly reports from Apple, Meta, Microsoft, and Tesla this week are scheduled to be a key test of the market rally sparked by excitement over artificial intelligence (AI).
The major indexes performed well with the Dow Jones up 0.64% to 313.69 points, the S&P 500 up 0.50% to 34.62 points and the Nasdaq Composite up 0.435 to 100.11 points.
The main focus is now on the two-day Federal Open Market Committee (FOMC) meeting that begins today and ends with an announcement on interest rate policy on Wednesday afternoon.
According to CME Group's FedWatch, traders assess a probability of about 97% that the central bank will keep interest rates steady, and expect clearer guidance on the next rate.
Turning to the performance of other major stocks, shares of prison operators GEO Group and CoreCivic suffered sharp drops after US Senate Democrats reported that they would oppose a funding bill for the Department of Homeland Security, which oversees ICE.
In contrast, shares of USA Rare Earth rose 7.9% after the US administration reportedly took a 10% stake in the mining company as part of a $1.6 billion investment package.
