BusinessweekOil Prices: The Perils of Bottom FeedingBusinessweekOver the past six months, oil prices have plunged more than 50 percent to below $50 a barrel, their lowest level since before the recession ended in 2009. That's slashed gasoline prices, t …

CNBCThis is the price point to beware for falling oilCNBCOil tanks and pump jacks are seen in an oil field near Bakersfield, Calif., on a foggy day, Jan. 17, 2015. Many investors believe that declining oil prices are a good thing—for now—though some see $3 …