Financial 411: The 'Flash Crash,' a Year Later

Crude Oil Prices Fall

What goes up, also comes down. Crude oil, which has been trading sharply higher this year, plunged nearly nine percent on Thursday. That's the sharpest one-day drop in more than two years.The price of a barrel dipped below $100, as economists voiced concerns about the direction of the U.S. economy. New jobless filings were up last week. Other commodities that have dipped in recent days are silver and gold.