The S&P 500 indexrefuses to fall into a bear market—but that doesn’t mean it’s found a bottom just yet.

Not that it wasn’t a painful week. The S&P 500 dropped 3% and has now fallen 18.7% from its Jan. 3 all-time high. A slide of 20%, which it touched Friday before bouncing back, signifies a bear market. The Dow Jones Industrial Average declined 2.9%, its eighth consecutive week of losses, matching its longest losing streak since 1932. The Nasdaq Composite, already in a bear market, slid another 3.8%, and is down 28.2% from…