Second wave worries, post-FOMC reaction, and exhaustion after the recent rally sees stocks slide, then slide a bit more, in a brutal sell-off on Wall St

At the close:

- S&amp;P 500 down 5.89%
- Dow down 6.90%
- Nasdaq down 5.27%

$SPX $DJIA $COMP https://t.co/mShhmgrM5E