Key TakeawaysThe S&P 500 fell 0.3% on Monday, Aug. 26, to kick off a trading week that will be heavy on economic and earnings data.Shares of Supermicro, Broadcom, and Micron moved lower ahead of AI chip giant Nvidia's earnings report, which is scheduled for Wednesday afternoon.Dayforce shares moved higher after the human resources (HR) software firm launched a new employee learning platform. Major U.S. equities indexes were mixed to open a new trading week that includes a busy calendar of corporate and econ ...