The NASDAQ lost -2.48 percent on Friday, while the S&P500 fell -1.79 percent and the DJIA declined -1.39 percent. There have been only 122 fall offs this deep since 2000; the count between 1950 and 1999 is much smaller, with only 41 declines this large or larger.
The date show that changes this negative are features of substantial and lengthy market declines. None, for example, happened between 2004 and 2006. And 2007 had a mere 5 such closes, though that price decline occurred in October.
Furthermore, 61 declines of this magnitude came during the decline of 2007 through 2009.
Yet, the record for the following day reveals substantially more stability and smaller losses, on the average. The median change in the past 11 years is -.09 percent for the NASDAQ; but plus .25 percent for the DJIUA and the S&P500. Nevertheless, the range of next day changes is much larger; they run from -5.8 to -7.9 percent for the NASDAQ, and from -5.6 to -6.9 percent for the DJIA and the S&P500.
One other feature deserves consideration; not a single decline of this depth occurred during the expansion years from 2004 through 2006.
DJIA -1.39 percent
NASDAQ -2.48 percent
S&P500 -1.79 percent