The U.S. stock market ended Thursday's session in a broad selloff, with all three major indices posting declines. The S&P 500 fell 0.87%, the Nasdaq Composite dropped 1.00%, and the Dow Jones Industrial Average lost 1.32%. The selloff was driven by a retreat in bond yields, which had been supported by Bessent's announcement of potential Treasury buybacks exceeding $4 billion. However, the bond market relief evaporated, contributing to the broader market decline. Walmart's stock also took a hit, with shares tumbling after earnings results, while SpaceX's stock slipped as 319 million new shares came to market. The selloff was particularly pronounced in small caps and oil stocks, which saw significant declines.

The overall tone of the session was risk-off, with investors reacting to a mixed bag of macro and sector-specific news. While Bessent's buyback announcement initially provided some relief to the bond market, the subsequent retreat in yields and the broader market selloff suggest a cautious approach to risk assets. Walmart's earnings results and SpaceX's share offering also added to the uncertainty, with investors digesting the implications for these companies' valuations. The selloff was uneven, with tech stocks retreating alongside other sectors, while health care and cyclicals saw some gains. The market's sensitivity to bond yields and sector-specific news highlights the complex interplay of factors influencing today's session.