U.S. stock markets posted gains as investors responded positively to strong corporate earnings reports and a decline in oil prices.

DuPont de Nemours contributed to the upbeat sentiment by raising its financial outlook for the year and announcing plans for a $275 million stock buyback program. The chemical company swung to profitability in the first quarter after reporting losses in the same period last year.

The broader market rally was supported by a combination of factors, including encouraging quarterly results from various companies and a drop in crude oil prices that eased some inflationary concerns among investors.

DuPont's improved performance and increased capital return to shareholders reflected the company's strengthened financial position and management's confidence in future prospects. The buyback program signals the company's commitment to delivering value to stockholders while maintaining operational investments.

The positive earnings season has helped sustain market momentum despite ongoing economic uncertainties. Lower energy costs have provided additional support by potentially reducing input costs for many businesses and relieving some pressure on consumer spending.