Traders Volatility News Today

Good morning. im carol costello. thanks so much for joining me. for some reason stocks are tanking. we had a good day on wall street yesterday. today totally the opposite. we go the new york stock exchange to find out why this is happening. >> reporter: the dow is down over 177 points right now. this has been a very volatile week on the trading floor for wall street. when we talk to traders volatility can be a good thing for them because ice how they make their money. they refer to buy the dip s...