US STOCKS-S&P 500, Dow edge lower as COVID-19 cases rise, home sales drop
* Southwest Airlines rises on smaller-than-expected loss * U.S. weekly jobless claims decline further * Indexes Down: Dow 0.44%, S&P 0.18%, Nasdaq 0.07% (Updates prices to open) April 22 (Reuters) - The S&P 500 and Dow Jones indexes edged lower on Thursday as a resurgence of COVID-19 cases globally sapped appetite for stocks, with data showing tepid U.S. home sales adding to the grim mood. Investor sentiment dulled in the first half hour of trading, with eight of the 11 major S&P 500 sectors in the red. American Airlines Group Inc and Southwest Airlines Co reported a smaller-than-expected qua...