Stock market today: S&P 500, Nasdaq close at record highs as Powell touts inflation progress Yahoo FinanceS&P 500 closes above 5,500 for the first time as Powell highlights inflation progress, Tesla jumps: Live updates CNBCShares edge higher, US Treasury yields weaken as markets weigh Fed chair comments CNADow Jones Jumps 162 Points As Powell Says This On Rate Cuts; Tesla Value Soars $68 Billion As Deliveries Crush Views Investor’s Business Daily