What they both have in common is around an 80% stock market crash which happend AFTER everyone thought the market was midway into a recovery.

Japan's Nikkei exchange in 1989 went from 39000 down to 24000 and then back up to 32000. Everyone thought they had survived the crash and were almost back to the top when the REAL crash took their market from 32000 down to 7000.  This was the drop that wiped most people out.

During the Great Depression, the Dow dropped from 398 to 191 and then rebounded 52.3% to 298. Just a mere 30% from the previous high and all the papers as well as Wall Street hypsters declared the end of the bad times and there would be nothing but big profits to be had.

Chase National Bank (aka JP Morgan Chase) - June 1930  Wall Street Journal
"We feel the current conditions of very easy credit and poor business have always been a buying opportunity in the past. We are absolutely confident that any list of good stocks will have good gains by the end of 1931 and probably show a profit by the end of 1930."

What happened from June 1930 to May of 1932 was an 86% bloodbath which truly was what wiped peoples accounts out. They were told by the hypsters that all was good and you better get back in or you will miss out. As the lie played itself out and people realized they were sold a bill of goods as to the state of the economy, that is when the real panic began and the markets fell from 298 down to 41. Yes 41.

If history is our guide, that would mean the Dow would fall somewhere in 2011 or 2012 to between 1500 and 3000.

You think it is impossible?
Did you believe we would drop from Dow 14126 to 6470 in a mere 17 months!

Unless your money manager has taken steps to protect you like being in gold, cash, or other defensive plays, time to fire them!