American Water Works (AWK -1.16%), the largest publicly traded U.S. water and wastewater utility, reported robust fourth-quarter 2023 results on Wednesday after the closing bell. Shares gained 3.1% on Thursday, though they declined 1.2% on Friday. Thursday's upward move was likely in part attributable to the company easily exceeding Wall Street's revenue and earnings estimates. But a good chunk of Thursday's gain and all of Friday's drop were probably due to overall market dynamics, as major indexes rose on ...