Market expert sees summer correction, S&P 500 at 7500 by year end

STORY: "Now, technically, because we broke out of 7500, what we've pointed to is that you can get to 7800, technically," Bartells said. "But some of these stocks have gone up tremendously - they look vertical in terms of performance - and that's just not sustainable."Bartels added that she recommends that longer-term investors ride out the volatility and remain both "fearless" and "patient," because her end-of-decade target for the S&P 500 "is for it to reach 10,000 to 13,000."