Oil prices rebounded by more than $5 a barrel Thursday, as another missile launch by Iran stoked worries that escalating political tensions in the Middle East could cut off supplies out of the region.
A day after Iran tested a missile capable of reaching Israel, Secretary of State Condoleezza Rice warned the oil-producing nation that the United States will defend its allies. Iran then responded with another missile launch.
Meanwhile, stocks stumbled through another volatile session but ended with a respectable gain Thursday after a multibillion dollar deal between Dow Chemical and rival Rohm and Haas helped offset concerns about the financial sector and the rising price of oil.
The mounting hostilities drew buyers back into the jittery energy markets, said John Kilduff, senior vice president of risk management at MF Global.
"We fell awfully fast, awfully far," Kilduff said, "and these Iranian tensions are putting a higher and higher floor under this market."
After falling by nearly $10 a barrel on Monday and Tuesday, light, sweet crude for August delivery soared $5.60 to $141.65 a barrel on the New York Mercantile Exchange. It was crude's largest daily leap since June 6, when the July contract jumped by $10.75 a barrel.
On Wednesday, oil prices had seesawed before settling a penny higher at $136.05, ending two days of sharp declines that left prices well below last Thursday's record trading high of $145.85 a barrel.
OPEC's secretary general said Thursday that the oil producing group will not be able to replace any shortfalls if Iran is attacked and takes its crude supplies off the market. Iran has control over the Strait of Hormuz, a passageway that handles about 40% of the world's tanker traffic.
Meanwhile, attacks on Nigerian oil facilities could again disrupt supplies in that oil-rich region. On Thursday, Nigeria's main militant group vowed to resume attacks because of Britain's recent pledge to back the government in the conflict there. Attacks by the Movement for the Emancipation of the Niger Delta over the past two years have already slashed the country's normal daily oil output by a quarter.
Stocks moved in and out of positive territory, underscoring investors' uncertainty about the financial companies and their quarterly results, many of which are due next week.
"Investors lack real clarity from the banks," said Marc Pado, U.S. market strategist at Cantor Fitzgerald in New York. "It's this uncertainty that keeps investors out of the market so what you get is a situation where you're reacting to news. There are a lot of crosscurrents."
The Dow Jones industrial average finished up 81.58, or 0.73%, at 11,229.02. But oil's resurgence back above $141 a barrel briefly pulled the Dow into negative territory in afternoon trading.
Broader stock indicators also finished higher. The Standard & Poor's 500 index gained 8.70, or 0.70%, to 1,253.39, while the Nasdaq composite index rose 22.96, or 1.03%, to 2,257.85.
Crude oil has reached a confounding point in its multi-year surge.
Supply worries certainly abound, and the value of the U.S. dollar, a major factor in oil's trek upward, remains weak against other currencies. But while investors don't want to lose out on another price increase, they are also seeing reasons — most notably, the flagging U.S. economy — to believe that oil might be peaking.