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Stocks closed up more than 9% on Friday, following the stock market's worst day in 30 years.
Why it matters: Stocks jumped during Trump's coronavirus press conference, ending Wall Street's wild week with its best single-day performance since the financial crisis.
By the numbers: The S&P 500, Nasdaq Composite and the Dow all rose about 9.3%, adding to earlier gains after Trump declared a national emergency.
- The S&P shed 8% this week. The index, which fell into a bear market in a record 16 trading sessions, is 20.1% from its all-time high.
The bottom line: Investors increasingly expect a recession, and warn the eye-popping volatility that we saw this week could continue as news develops around the coronavirus outbreak.