Dow dropped 512 points today, "single worst day since the 2008 financial crisis"

Yeah. Ugly. From CNN:

In their single worst day since the 2008 financial crisis, stocks plunged Thursday, with the Dow tumbling 512 points, as fear about the global economy spooked investors.

"The conventional wisdom on Wall Street was that the economy was growing -- that the worst was behind us," said Peter Schiff, president of Euro Pacific Capital. "Now what people are realizing is the stimulus didn't work, and we may be headed back to recession."

U.S. markets were already sharply lower on widespread worries, including the weak job market.

So, the debt deal didn't quell the fears of the markets. It's a double whammy: A sucky deal and 401ks still take a beating.