NEW YORK (AP) — The Standard and Poor’s 500 index climbed to another five-year high after strong reports on housing starts and unemployment claims made investors more optimistic about the U.S. economy.

The S&P 500 gained 8.31 points to close at 1,480.94, its highest level since December 2007. The Dow Jones industrial average also rose, climbing to a five-year high during the day, before falling back to finish 84.79 points higher at 13,596.02. The Nasdaq composite climbed 18.46 points to 3,136.

U.S. builders started work on homes in December at the fastest pace since the summer of 2008, the Commerce Department said Thursday. Homebuilder stocks rose broadly following the report. The S&P 500’s homebuilding index climbed 3.8 percent, its biggest gain in almost a month. PulteGroup led the advance with a jump of $1.03, or 5.3 percent, to $20.37.

The number of Americans seeking unemployment benefits fell to a five-year low last week, the Labor Department reported, the latest sign that the job market is healing. Weekly unemployment benefit applications fell 37,000 to 335,000, a bigger decline than economists had forecast, according to financial data provider FactSet.

The reports helped offset disappointment over the fourth-quarter earnings reports of two of the nation’s biggest banks, Citigroup and Bank of America, said JJ Kinahan, chief derivatives strategist at TD Ameritrade.

“The financial stocks are having a tough time impressing the Street with anything,” Kinahan said. “The traditional banks are getting squeezed on margins and the expectations for a lot of those companies had already been set low.”

Citigroup fell $1.24, or 2.9 percent, to $41.24 after its income fell well short of Wall Street’s expectations. The bank’s legal expenses rose and it released less money from its loan-loss reserves.

Bank of America dropped 50 cents, or 4.2 percent, to $11.28 after its earnings declined. The bank is continuing to work on clearing up old problems at its mortgage unit. The bank made $367 million in the last three months of 2012 after paying preferred dividends, down sharply from $1.6 billion in the same period a year ago.

Kim Caughey Forrest, a senior analyst at Fort Pitt Capital Group, said it was too early to conclude that the housing market had turned the corner. She noted that a large “shadow inventory” of houses that still need to be foreclosed on may weigh on house prices in the coming months.

“This rally is probably a little bit too optimistic for the information that we got,” Caughey Forrest said. “There’s some conflicting information here and the market has just decided to overlook the negative thing.”

The indexes powered higher even as more discouraging news about manufacturing came out. The Philadelphia branch of the Federal Reserve reported that manufacturing contracted this month in the mid-Atlantic region. On Tuesday, the Fed’s New York branch reported that manufacturing in its own district was worsening.

Stocks started 2013 with a rally after lawmakers came up with a last-minute plan to stop the U.S. going over the “fiscal cliff,” a series of tax hikes and spending cuts that economists say would probably have pushed the U.S. into recession.

The Dow and the S&P 500 are both up 3.8 percent since the start of January.

The yield on the 10-year Treasury note, which moves inversely to its price, rose four basis points to 1.88 percent.

Other stocks making big moves:

— EBay rose $1.27, or 2.4 percent, to $54.17 after reporting fourth-quarter earnings that exceeded analysts’ expectations. Bargain-hunting holiday shoppers flocked to eBay’s online shopping mall and digital payment service, PayPal.

— CBS surged $3.01, or 7.9 percent, to $40.95 after the media company said late Wednesday that it was converting its U.S. outdoor advertising business to a real estate investment trust and selling the international portion of the business. Deutsche Bank analysts lifted their target price on the stock to $47 from $40, saying the conversion to a REIT “meaningfully enhances value.”

— BlackRock gained $9.76, or 4.4 percent, to $232 after the investment manager said its fourth-quarter net income surged, beating analysts’ forecasts. The company also increased its dividend and said it may buy back more stock.