The temptation to run for the exit to avoid potential losses coupled with a fear of losing out if things turn out to be better than we thought is a frequent dilemma facing investors. The market’s close scrutiny of every piece of economic data and knee-jerk reactions are unlikely to abate, as concerns about the slowdown in China and the Federal Reserve raising interest rates in the US loom alongside other macro headwinds.
http://www.yourmoney.com/investing/blog-steady-returns-in-volatile-times/