In the past year, we’ve seen some big swings in the financial markets. This volatility may make you feel as if you have little control over your investment success.But the truth is, you do have more control than you might think — as long as you don’t let fear guide your decisions.Investment-related fear can manifest itself in a few different ways:_ Fear of loss – Some investors may emphasize avoiding losses more than achieving gains. Consequently, they might build portfolios they consider very low in risk, possibly containing a high percentage of certificates of deposit (CDs) and U.S. Treasury securities.