Stocks posted solid gains on Friday, wrapping up their best week so far this year. The Dow Jones industrial average (^DJI) rallied 127 points, the Standard & Poor's 500 index (^GPSC) rose 9, and the Nasdaq composite (^IXIC) gained 3 points. The Nasdaq's 7-day winning streak is its longest since July 2011. By the way, investors get a long-weekend.