The market had a remarkable year last year, gaining 32.39% in the S&P 500 index. To put it in perspective, the S&P 500 has gained over 20% in a calendar year 21 times since 1945 that is 21 times out of 68 years, or almost 31 % of the time. This amazing statistic is reason enough for remaining fully invested in the market. Even when times are grim, and the market is off, one should remain invested. In the same 68 year period, the market has gained over 30% just six times. Still this almost 10% records of gains is also a strong argument for staying invested.