(Updates prices, adds comment)
By Maryelle Demongeot
LONDON, March 20 (Reuters) - Oil pared some losses after falling below $100 on Thursday for the first time in two weeks on growing concerns an economic slowdown in top consumer the United States would undermine global energy demand.
U.S. crude <CLc1> was down $1.30 to $101.24 a barrel by 1532 GMT, but well up from an earlier low of $98.65, the first time since March 5 that it has fallen below $100.
Prices lost almost $5 on Wednesday on economic concerns.
London Brent crude <LCOc1> was down 80 to $99.92, after briefly rising to positive territory.
Commodities earlier tumbled as investors retreated into cash, taking profits after a series of record peaks this year.
Some banks may have also tightened credit and increased margin calls, forcing some selling, some analysts said.
"We continue to see profit-taking among commodities. There are also macro-economic concerns about the economy and the dollar has been doing better," said Mike Wittner, global head of oil market research in London for Societe Generale.
Gold <XAU=> dropped more than 4 percent to a one-month low earlier, while platinum slid more than 5 percent to $1,820 an ounce, the lowest since early February as funds cashed in.
Oil and other commodities have struck a series of record highs since the beginning of the year as investors fled stocks markets and took refuge in dollar-denominated assets.
U.S. oil prices averaged around $97 a barrel since the beginning of this year, up from $72.30 in 2007.
But investors nervous about the economy are cashing in on recent record prices in commodities and energy [
]."Commodity players seem to be coming round to the notion that the deterioration in the U.S. macro picture cannot be ignored," Edward Meir said in a daily note by MF Global.
Weekly U.S. stocks data released on Wednesday showed lower fuel stocks than forecast, but the figures also revealed a fall in demand.
U.S. demand for gasoline over the past four weeks was 0.1 percent below last year, the U.S. Energy Information Administration figures showed.
Adding to the gloom, U.S. government data showed on Thursday that the number of jobless staying on aid rolls rose to the highest in three and a half years to 378,000, higher than the expected 360,000, possibly partly due to an auto industry strike. [
]"We believe that the combination of low economic growth in the United States and high oil price inflation will have its strongest impact on demand in the first half of the year," Goldman Sachs said in a note.
Goldman pointed to the 3.2 percent fall in U.S. oil demand over the past 4 weeks from last year according to stocks data released on Wednesday. (Additional reporting by Luke Pachymuthu in Singapore; editing by James Jukwey)