When it comes to stocks so far this year, bigger has proven to be better.
Large-cap stocks, as measured by the S&P 500, have outperformed the Russell 2000 small-cap index by around 8 percent in 2014. According to Matarin Capital's Nili Gilbert, that trend is likely to continue for the rest of the year.
On CNBC's "Fast Money" on Wednesday, Gilbert laid out three reasons why large-cap stocks will continue to outperform.
Gilbert cited valuation as the first indicator of big-cap dominance. "At this point small stocks are looking pretty expensive relative to large."