U.S. stock indices ended lower on Friday, led by weaker big technology-related shares following their recent rally, as data showed U.S. consumer sentiment dropped to a six-month low. Caroline Valetkevitch for Reuters: The S&P 500 technology sector was lower, with shares of Apple Inc among the biggest drags. The technology index is still up about 22% so far this year. Adding to investor worries, May consumer sentiment dropped to its lowest since November as a standoff to raise the federal government’s borrowing cap fanned worries about the economic outlook. According to preliminary data, the S&P 500 (.SPX) lost 6.48 points, or 0.16%, to end at 4,124.14 points, while the Nasdaq Composite (.IXIC) lost 43.76 points, or 0.35%, to 12,284.74. The…