The S&P500 had just three losses as large in the roughly 100 trading days since last October, whereas the NASDAQ had 7, and the DJIA experienced 8 losses like todays.
As for the day after such deep declines, since the markets last peak, the DJIA went up seven times, declining just once. The NASDAQ turned in almost the same performance, rising the next day on six of the seven times its loss exceeded 2.3 percent.
The S&P500 spring back is not as frequent, with just one positive day following its three steep declines since last October.
DJIA -1.75 percent
NASDAQ - 2.30 percent
S&P500 - 2.21 percent