NEW YORK — Oil prices tumbled more than $10 a barrel Monday, dropping back below $100 as a U.S. financial bailout failed to win legislative approval, raising fears of a prolonged economic downturn that could drastically erode global energy demand. Light, sweet crude for November delivery sank $10.52, or 9.8 percent, to settle at $96.36 on the New York Mercantile Exchange, after earlier dropping as low as $95.04. The dramatic sell-off capped a week of frenzied volatility in oil markets. A week earlier, prices shot up over $16 to $120.92 a barrel in the biggest one-day dollar gain ever. But as disagreements over the government’s $700 billion bailout plan intensified over the last several days, oil market traders began moving out of their positions at a rapid clip; Monday’s decline was the second largest ever in dollar terms and the biggest percentage-wise since 2001. Crude has now fallen almost $25, or 20 percent, in the last seven days. Monday’s nosedive came as House lawmakers defeated the emergency measure, which would have absorbed billions of dollars in banks’ bad mortgage-related debt and other risky assets in a bid to steady the teetering economy. Democratic and Republican […]