24,345.75 - 1,175.21 = 4.6% change. Correction requires at least 10% drop. Today it's already 1.55% back up. I agree it was the biggest one-day drop, but it was also a drop from record high DJIA in history. Larger the number, the more room you have for points to fall. It's the market doing what the market does. Up and down.