Major U.S. stock indexes saw a slight uptick during midday trading on Tuesday, boosted by positive developments in the market. U.S.-traded shares of Chinese companies surged following Beijing's announcement of a stimulus package aimed at bolstering the Chinese economy. Investors responded positively to the news, propelling the S&P 500 and Dow to reach record highs, while the Nasdaq also showed gains.

Investor sentiment was further bolstered by the performance of tech companies, particularly Nvidia, whose shares climbed after Morgan Stanley analysts indicated robust demand for its Hopper and Blackwell GPUs. Additionally, shares of companies in the gold mining sector, including Freeport-McMoRan and Newmont, experienced gains as the price of gold reached a new all-time high, attracting investor interest in the precious metal market.

In response to recent market developments, U.S.-based companies with significant exposure to China witnessed a surge in stock prices. Caterpillar emerged as a leader in the Dow's gains, while Las Vegas Sands and Wynn Resorts also experienced an uptick in their stock value. Furthermore, Visa faced a setback as its shares slumped on reports suggesting U.S. regulators' intent to file a lawsuit against the credit card company for alleged monopolistic practices in payment processing technology, with other credit card providers also experiencing a drop in their stock prices.

Oil futures showed an upward trend, aligning with the rise in the yield on the 10-year Treasury note. While the U.S. dollar strengthened against the yen, it saw a decline against the euro and pound. In the cryptocurrency market, most major cryptocurrencies recorded a decrease in value, reflecting fluctuations in the broader financial landscape.