The S&P 500 regained the 1,500 level for the first time in more than five years, but that's a milestone that could also trigger a pause, analysts say.

The S&P 500 briefly broke above 1,500 on Thursday and flirted with it all day Friday, before closing up eight at 1502, It's the first close above that level since Dec. 10, 2007. The S&P was slightly higher at midday, despite the steep 13 percent two-day decline in tarnished darling, Apple.