4 p.m.: Stocks caught a major bounce in the final minutes of their worst week since the financial crisis, as bargain hunters swooped in before Friday’s close. The Dow Jones Industrial Average ended off 357 points, or 1.4%, after being down over 1,000 points at its morning lows.

The S&P 500 also surged into the closing bell, finishing with a 0.8% loss, while the Nasdaq Composite managed to eke out a 0.01% gain—up less than 0.9 points—to avert a seven-day losing streak. Each index is down close to 13% from its highs as recently...