Dow Jones Closes At Day's Low; Tesla's AI Day On Deck; Micron Upgraded; Health Care Stock Gaps Up By: Investor's Business Daily September 30, 2022 at 16:50 PM EDT The S&P 500 pared some of the morning's 0.5% loss but lost ground again to close 1.5% lower. Read More >> Related Stocks: Apple Enphase Energy Inc Micron Technology Microsoft Tesla, Inc.