From Business Insider:
Rising interest rates. Sinking oil prices. A strong dollar and weak earnings. Greece, China and Puerto Rico. The news headlines make hay of these swings, and investor emotions can ride along with the dramatic stories. The stock market will spike one day, you feel optimistic and invest, then the market drops back down the next day.
Earlier this year, we talked about how the markets would seem more volatile than in recent past. Well, they have delivered on that forecast. After years of relative calmness and steadily rising returns, markets have been jumpier lately.