Oil prices slumped below $100 a barrel on Monday as the House of Representatives voted down a $700 billion bailout plan for the financial markets, raising the prospect of slower economic growth and depressed demand for petroleum products. The House leadership, however, plans a second attempt to pass the bill later this week.

Crude oil futures fell $10.52 to settle at $96.37 a barrel on the New York Mercantile Exchange. After an erratic and confused week, oil prices have lost nearly $25 since Sept. 22.

Commodity markets have been shaken by the turmoil on Wall Street while still recovering from two powerful hurricanes in the Gulf of Mexico. After reaching $145.29 a barrel in July, prices slumped to nearly $90 a barrel this month as the nation’s economic prospects dimmed. But in a wild market, they spiked back up last week because of deep uncertainty in the financial markets.

But anxiety once again gripped investors on Monday after a stunning failure of the House to pass the compromise bailout agreement drafted over the weekend. The plan, the biggest bailout in history, would have allowed the Treasury Department to buy back troubled assets held by banks and other financial institutions. It was unclear when the House would schedule a new vote on the bailout, or whether it would pass.