Technology stocks are resurgent all of a sudden, but it isn’t too late to find winners. The S&P 500 and the technology-heavy Nasdaq Composite are nearing record levels after bouncing back from recent declines, and the Nasdaq has gained 3% from a January low point. It is holding on to a more than twofold gain for the past five years, and trading at one of its most expensive levels in the past couple of years.