Not all the best deals lie with the big dogs.
Large capitalization equities have under-performed from the start of 2014 until the correction low of October 15. Compared to that, small and mid-cap equities "have been posting positive relative performance...off of relatively undervalued levels," according to Hugh Johnson, chairman and CIO of Hugh Johnson Advisors.
"We expect small and mid capitalization equities to continue to outperform large capitalization equities through 2015," he told CNBC's "Power Lunch" on Friday.
But Johnson suggests limiting positions in small-cap equities to 6 percent of a portfolio's total and keep mid-cap equities to 12 percent.
"Given the relatively small positions, investors can have adequate diversification with both capitalization ranges by buying ETFs," he added.