Stocks tumble in the final hour of trading

Stocks staged a recovery and then rolled over in the final hour of trading on Wednesday, a day after a sharp selloff wiped out gains for the year.
Energy stocks, which have recently fallen into a bear market, led the S&P 500 rally.
Follow the US indexes in real time here.Stocks rose Wednesday as oil prices steadied, a day after energy and mega-cap technology companies led a sell-off that wiped out Wall Street’s gains for the year.
But in the final hour of trading, the Dow Jones Industr