Wall Street capped a week of huge gains with a sizable advance today after investors set aside some anxiety over news that the economy lost...

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NEW YORK — Wall Street capped a week of huge gains with a sizable advance today after investors set aside some anxiety over news that the economy lost jobs last month and focused on a possible rescue plan for the troubled bond insurance sector.

The Dow Jones industrial average rose 92.83 to 12,743.19 after climbing more than 200 points Thursday.

Microsoft, one of the 30 Dow stocks, fell $2.15 to close at $30.45 a share after making an unsolicited $44.6 billion bid for Internet giant Yahoo. Boeing, also a Dow stock, fell 42 cents to $82.76.

Yahoo surged $9.20, or 48 percent, to $28.38, on word of the buyout, which it said it would consider. Rival Google fell $48.40, or 8.6 percent, to $515.90 after reporting its fourth-quarter earnings and revenue growth slowed at a faster pace than Wall Street expected.

Broader stock indicators also rose. The Standard & Poor’s 500 index rose 16.87 to 1,395.42, and the Nasdaq composite index advanced 23.50 to 2,413.36.

Stocks fluctuated at times during the session, however, as investors weighed seemingly contradictory readings on the economy.

The mix of economic news reminded investors of the continuing fallout from the housing and mortgage crisis and made for somewhat volatile trading.

The first blow came from the Labor Department’s worrisome employment report for January. The economy lost 17,000 jobs, marking the first contraction of the labor market in more than four years. The news confounded economists, who were expecting 70,000 new jobs, according to Thomson/IFR. The unemployment rate fell to 4.9 percent from 5 percent in December, though the move came as the labor pool shrank.

The Commerce Department added to the fray, reporting that construction spending dropped 1.1 percent in December — the most in 15 months and twice what analysts expected.

And rating agency Moody’s Investors Service warned on a conference call today that it expects to downgrade some bond insurers this month. A top rating is crucial for bond insurers to draw new business and for investors to feel secure about the bonds these companies already insure.

Stocks did get some ballast from a report showing a pickup in the nation’s manufacturing sector in January. The Institute for Supply Management, a business group, said its index of manufacturing activity rose to a reading of 50.7 from 48.4 in December. Wall Street had expected the figure would come in at 47, a reading that would indicate a contraction of the manufacturing sector.

“We’re starting to see the long-term investors and the fund mangers come back into the market. That’s why I think you’re seeing stocks rally even when there is negative news,” said Marc Pado, U.S. market strategist for Cantor Fitzgerald.

Stocks climbed today after a week in which Wall Street saw huge gains but also enormous volatility. The week began with a sharp advance as investors awaited the Federal Reserve’s decision on interest rates. Stocks extended their gains Tuesday and on Wednesday the central bank delivered on a widely expected half-point cut in interest rates. But unease about bond insurers short-circuited a rally in stocks after the rate cut. Stocks sold off again early Thursday but performed an about-face to close sharply higher as investors considered the effects of rate cuts and the possibility that the government might orchestrate a rescue for the trouble bond insurance market.

The latest rate cut meant the Fed had slashed rates by an unprecedented 1.25 percent in little more than a week, a move that appeared to largely erase doubts about whether the central bank would step in to assuage investors’ fears about the health of the financial sector and, more broadly, of recession.

The week’s gains restored some of the huge losses seen in the earliest days of the year. Still, stocks this week finished what was their worst January since 1990. The Standard & Poor’s 500 index, the market measure most closely followed by professional traders, lost 6.1 percent for the month.

Bond insurers showed gains today amid word that efforts are moving ahead to aid the troubled bond insurance market. Ambac Financial Group Inc. rose $1.56, or 13 percent, to $13.20, while MBIA Inc. rose 86 cents, or 5.6 percent, to $16.36.

In other corporate news, Motorola jumped $1.19, or 10 percent, to $12.69 after announcing it is considering selling a sale or spinoff its lackluster mobile phone business.

The Russell 2000 index of smaller companies rose 17.20, or 2.41 percent, to 730.50.

Advancing issues outnumbered decliners by more than 3 to 1 on the New York Stock Exchange, where volume came to 1.79 billion shares compared with 2.19 billion shares traded Thursday.

Bond prices showed little movement. The yield on the benchmark 10-year Treasury note, which moves opposite its price, stood unchanged at 3.59 percent from late Thursday.

The dollar was mixed against other major currencies, while gold prices fell.

Light, sweet crude oil fell $2.74 to $89.01 on the New York Mercantile Exchange after the employment report raised concerns that the U.S. economy will slow and hurt demand for oil.

Overseas, Japan’s Nikkei closed down 0.7 percent. In Europe, London’s FTSE finished up 2.5 percent, Frankfurt’s DAX gained 1.7 percent and Paris’ CAC 40 rallied 2.2 percent.