New York ? Turning cautious after Wall Street’s big two-day rally, investors left stocks mixed Friday, taking some profits in blue chip issues and doing some buying in the tech sector. Still, the major stock indicators all scored their second-straight weekly advance, an achievement not seen in five months.

“The bottoming process is in hand,” said Larry Wachtel, market analyst at Prudential Securities, of the market’s two-week gains.

The Dow Jones industrial average closed down 40.08, or 0.5 percent, at 8,778.06. The loss was attributable largely to profit-taking following the Dow’s two-day gain of 335.75.

Broader market indexes finished mixed. The Nasdaq composite index rose 16.00, or 1.2 percent, to 1,361.01, having advanced 75.73 in the previous two sessions. The Standard & Poor’s 500 index fell 1.48, or 0.2 percent, to 928.77, following a two-day gain of 46.04.

The market’s major gauges claimed their second-straight weekly advance, a feat they last accomplished in the two-week period ended March 8.