I came across this article in my reading today and found it very enlightening. In my opinion it is worth the time to read. http://finance.yahoo.com/banking-budgeting/article/112528/stock-market-history-marketwatch?mod=bb-budgeting&sec=topStories&pos=5&asset=&ccode=
One of the biggest challenges for most investors is profiting on bearish moves in the market. Our tendency as traders is be optimistic and look for bullish opportunities. It is a hard habit to get out of. Bearish markets give amazing opportunities for profits if you know how to position your portfolio to take advantage. You also need to know how to adjust. Don't go into this earnings season without that knowledge. It can wipe you out.