Bond yields sink, stocks fall as investors demand safety

A dizzying, brutal week of trading dropped one last round of harrowing swings on investors Friday.
After skidding sharply through the day as fear pounded markets, steep drops for stocks and bond yields suddenly eased up in the last hour. By the end of trading, the S&P 500 had more than halved its loss for the day to 1.7% and even locked in a gain for the week.
It’s the latest lurch in a wild ride that has sent stocks flipping between huge gains and losses — mostly losses the last