The Bush administration has further tightened supplies by announcing that it would add to the nation’s Strategic Petroleum Reserve in the coming weeks, a move that some leading Democrats have urged President Bush to call off to ease the tight oil market.

Investors and hedge funds have contributed to the run-up in prices. Oil, like other commodities, has become a perceived safe haven for traders who are skittish about the weakening dollar and fallout from the American credit crisis.

“There is a momentum for higher prices because of the lack of cushions and because surprises are everyday events,” said Larry Goldstein, a director of the Energy Policy Research Foundation. “When anything goes wrong now, it gets immediately priced in not by pennies, nickels or dimes but by dollars.”

Oil is now within reach of its inflation-adjusted high, reached in April 1980 in the aftermath of the Iranian revolution when oil prices jumped to the equivalent of $102.81 in today’s money. The brief stab at $100 on Wednesday broke the previous intraday trading record of $99.29, reached on Nov. 21. The price at the end of the day, $99.62, surpassed the record close of $98.18, set on Nov. 23.

Other commodities also rose, spurring more speculation that inflation could be a problem this year. Spot gold climbed over $860 an ounce, and soybeans, wheat, platinum, heating oil and natural gas soared.

Unlike the oil shocks of the 1970s and 1980s, the current spike in oil prices has not caused a recession or contracted consumer spending in a major way so far. But it has widened the trade deficit and raised concerns about inflation at a time when a growing number of economists fear a recession may be coming.

Energy experts are divided about how high oil prices can go, with some predicting that an economic slowdown will ultimately ease demand pressures.