New York ? Wall Street closed an erratic week with strong gains Friday as strong earnings from Microsoft Corp. and an optimistic outlook from Countrywide Financial Corp. outweighed investor concerns about the economy.

Friday’s report from Countrywide – that the company expects to return to profitability soon, despite a big third-quarter loss – gave investors hope that problems in the housing market are contained and that U.S. consumers still have spending power. Thursday night’s strong report from Microsoft inspired strong buying throughout the technology sector.

The Dow Jones industrial average rose Friday by 134.78, or 0.99 percent, to 13,806.70.

Broader stock indicators also gained. The Standard & Poor’s 500 index climbed 20.88, or 1.38 percent, to 1,535.28, and the technology-dominated Nasdaq composite index advanced 53.33, or 1.94 percent, to 2,804.19. For the week, the Dow rose 2.11 percent, the Nasdaq was up 2.90 percent, and the S&P 500 jumped 2.31 percent.