NEW YORK — The worst week for the stock market in two months ended with a whimper in thin trading today.

The Dow Jones industrial average lost 4.8 percent this week, while the broader Standard & Poor’s 500 index fell 4.7 percent. Both had their worst weeks since Sept. 23.

Major indexes wavered throughout today’s session, which was shortened because it’s the day after Thanksgiving. Worries about Europe’s debt crisis flared up again after Italy had to pay 7.8 percent to borrow for two years at a debt auction. It’s another sign that investors are increasingly hesitant to lend to European countries.

The euro slipped to $1.32, losing 2 percent this week against the dollar. The drop puts the euro at its lowest level since Oct. 4.

Higher interest rates on government debt of Italy, Spain and other European countries have rattled stock markets in recent weeks. When borrowing costs climb above the 7 percent threshold, it deepens investor fears about a government’s ability to manage its debts. Greece, Ireland and Portugal had to seek financial lifelines when their interest rates crossed the same mark.

The Dow fell 25.77 points, or 0.2 percent, to close at 11,231.78. Of the Dow’s 30 stocks, Chevron Corp. lost 1.6 percent today, the biggest drop. Travelers Cos. Inc. added 1.2 percent, the largest gain.

The S&P 500 lost 3.12 points, or 0.3 percent, to 1,158.67. The Nasdaq composite dropped 18.57, or 0.8 percent, to close at 2,441.51.

Trading volume was 1.6 billion, less than half the daily average.

Markets were battered this week as governments in Europe and the U.S. struggle to tackle their debts. The Dow lost 248 points on Monday as a Congressional committee failed to reach a deal to cut federal budget deficits. It plunged 236 points Wednesday after investors balked at buying German government debt.

Retailers traded mixed on the Friday after Thanksgiving, the traditional start of the holiday shopping season and usually the busiest day of the year for retailers. Amazon.com Inc. dropped 3.5 percent. Wal-Mart Stores Inc. inched up 0.4 percent.

A record number of people were expected to show up at stores this weekend to take advantage of deep discounts. The National Retail Federation estimates that 152 million people will go shopping over the three days starting today. That would be an increase of 10 percent from last year.

AT&T’s stock dipped less than 1 percent. The company said Thursday that it is budgeting to pay $4 billion in break-up fees if its attempted $39 billion takeover of T-Mobile USA from Deutsche Telekom falls apart.

Four stocks fell for every three that rose on the New York Stock Exchange.