For the past three years, traders have made a killing buying the dips. Not today, says CNBC's...

|By:, SA News Editor

For the past three years, traders have made a killing buying the dips. Not today, says CNBC's Bob Pisani. After days of trying, buyers have now stepped away, staging a sort of "buyers strike" and leaving stocks to drift lower. That can be dangerous, Pisani warns, because spikes in the VIX, like what we saw today, leave the markets extremely vulnerable to big moves down over the coming days.