CNBC | Oil tacks on $2 as cold snap forces bears to back off CNBC Oil soared nearly 8 percent on Friday as a cold snap boosted demand for heating oil and investors took advantage of the lowest prices since 2003 to close out some of their more profitable bets on price declines. Short covering, the practice of buying ... Oil Prices Rally Above $31 a Barrel on Central Bank Stimulus Hopes Oil prices jump on stimulus hopes despite glut Oil gains 8 percent as cold snap forces bears to back off |