Traders work on the floor of the New York Stock Exchange shortly after the opening bell in New York, U.S., March 17, 2020.
Lucas Jackson/Reuters
- US stocks closed lower Friday, marking the worst week for the S&P 500 since mid-April.
- A global IT outage caused by a Crowdstrike update exacerbated Friday's stock market decline.
- Next week, investors will focus on upcoming earnings from Tesla and Alphabet, as well as economic data releases.
US stocks closed lower on Friday...