The three main U.S. stock indices ended the trading session lower on Tuesday, influenced by mixed corporate earnings reports and a cautious stance ahead of the Federal Reserve's upcoming policy decision. The S&P 500 dropped by 0.3% after having temporarily reached a new intraday peak. Similarly, the Nasdaq 100 decreased by 0.2%, and the Dow Jones Industrial Average fell by 204 points. The market was notably impacted by weaker-than-expected results from UnitedHealth, which saw a decline of 7.5%, Boeing, which decreased by 4.4%, and Merck, which fell by 1.7%. Additionally, United Parcel Service and Whirlpool both experienced declines exceeding 10% following unsatisfactory earnings and future guidance. Investors were also considering a reduction in job openings and hiring figures for June, despite a surprisingly positive consumer confidence reading for July. Trade discussions between the U.S. and China concluded without reaching a finalized agreement, maintaining hopes for an extension of the current tariff ceasefire. The Federal Reserve is anticipated to maintain the current interest rates on Wednesday, with market participants closely monitoring for any indications on future policy direction amidst evidence of alleviating inflation pressures.