Jill Goldsmith Co-Business EditorThe Dow reversed its losses for the year and the Nasdaq and S&P 500 hit records at close as investors saw a possible tempering of COVID-19 spread and liked a policy speech by the Federal Reserve chief the day before.Shrugging off continued high unemployment and the ongoing pandemic, the DJIA ended the week up 161.6 points, or 0.57% — less than 1,000 points away from a record high in February.Among showbiz stocks, Roku led, hitting a new all-time high and closing