Rapid Market Declines in Pictures

1962 
A decline of 27% 1962 between March 62 - Jun 62.  16% in the month of May and retested 4 months later in October.  Rally fizzled and came back to the lows again in October which marked the end of the correction

1980
This was a quick decline of 17% over 6 weeks but the  big trouble was due later in the year in a two year bear market between Nov 80 - Aug 82.

1987
While most news article reference Black Monday when the market fell 20.4%, the total decline in the correction was 33.5%.  Over the next two days, the market clawed back 15% to then subsequently give back and re-test the lows few months later.

1998
Market declined a total of  19.5% (from July 20 - Aug 31), rebounded 11.3% over the next 3 weeks and retested the lows again on Oct 8. ​

2011
Initial market decline was 17% ( July 11 - Aug 11).  The market rose 4.6% the next day, gave back everything the following day, chopped around and made a new low on Oct 3 (total 19% decline). The undercut low on Oct 4 was the bottom (one I remember like yesterday)