The recent period of mild volatility is what's making the current market sell-off appear so shocking, according to two experts. On Thursday, U.S. stocks fell sharply as strong earnings and economic data were not enough to quell jitters on Wall Street. The Dow Jones industrial average fell more than 1,000 points and entered correction territory — it is also on track to post its biggest weekly decline since October 2008. Meanwhile, the S&P 500 fell 3.75 percent and the Nasdaq composite declined 3.9 percent on Thursday. "It's just been an unusually long period of mild volatility that makes this seem so rough," ... (full story)