By STAN CHOE and ALEX VEIGA (AP) — Stocks racked up more gains on Wall Street Friday, as the S&P 500 had its best day in two years and just its second winning week in the last 12 to provide a bit of relief from the market's brutal sell-off this year. The benchmark index rose 3.1%, with technology and banks leading the broad rally. The S&P 500 notched a 6.4% gain for the week, erasing the brutal loss