The following is a post I saw from Mike Darda:

After yesterday’s close, the S&P 500has declined 48.5% from the October 2007 peak though yesterday’s close. This trumps the 1973-1974 bear in which the S&P 500 dropped 48.2%, the worst bear in post WWII history. So this naturally takes us back to the Depression for comparison sake. Below I have the peak-to-trough S&P 500 from this cycle juxtaposed to the peak-to-trough S&P 500 from 1929-1932. We came down faster and harder initially in the ’29-32 bear, but the magnitude of decline at this stage (292 trading days in) is eerily similar. Hopefully that’s where the similarities end………….