Wall Street gave up a big early advance and closed mixed today after oil prices closed above $100 for the first time and stoked fears that...

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NEW YORK — Wall Street gave up a big early advance and closed mixed today after oil prices closed above $100 for the first time and stoked fears that inflation will stymie and already troubled economy.

The Dow Jones industrial average fell 10.99 to 12,337.22 after being up more than 100 points earlier in the session.

Microsoft, one of the 30 Dow stocks, fell 14 cents to close at $28.17 a share. Boeing, also a Dow stock, rose 19 cents to $85.37.

Broader indexes also moved lower. The Standard & Poor’s 500 index fell 1.21 to 1,348.78; and the Nasdaq composite fell 15.60 to 2,306.20.

But advancing issues were ahead of decliners on the New York Stock Exchange by about 9 to 7.

Soaring oil prices could bring more problems for consumers, having already made many Americans shy about spending in recent months. Consumer spending, a key driver of U.S. economic growth, has also been shaken by falling home prices and the volatile stock market.

The market was also concerned that rising inflation might make the Federal Reserve reconsider its bias toward lowering interest rates to help the economy.

“I think there are still a lot of worries in the market that we have this stagnant growth in the economy and higher prices,” said Richard Sparks, senior equities analyst at Schaeffer’s Investment Research in Cincinnati.

In addition, investors likely were positioning themselves ahead of a half-dozen economic reports that could give the market further direction. Paramount will be Wednesday’s Labor Department report on consumer prices for January, which is a closely watched gauge for inflation. The Fed will also be releasing minutes from its last meeting.

Meanwhile, new concerns that banks are facing more financial problems this year dragged the sector sharply lower — and reminded investors that the credit crisis appears far from a resolution.

Light, sweet crude for March delivery rose $4.51 to settle at a record $100.01 a barrel on the New York Mercantile Exchange after earlier rising to $100.10, a new trading record. It was the first time since Jan. 3 that oil had been above $100.

Other commodities, including gold and soybeans, rose as well. At the pump, gas prices rose further above $3 a gallon.

Beyond inflation, investors also continued to worry about the financial sector. So far, global banks have written down more than $150 billion from bad bets on mortgage-backed securities — and more losses are expected to the first quarter.

British bank Barclays Group revealed credit-related losses totaling $3.13 billion, up from a smaller write-down in November, while Credit Suisse, Switzerland’s second-largest bank, said it has suspended “a handful” of traders in connection with the overvaluation of asset-backed securities by $2.85 billion.

Also, The Wall Street Journal reported that financial giant Lehman Brothers could see big losses due to its significant investments in commercial real-estate loans. Lehman fell $1.35, or 1.3 percent, to $53.42.

“Can these financial stocks get to the bottom of their questions of soundness in asset quality? We have to reach a tipping point here,” said Richard Cripps, chief market strategist for Stifel Nicolaus. “That’s the part that I think has to occur for this market to have a sustained advance.”