Are SMidCaps coming back into fashion? They had a good day today. They outperformed the LargeCaps. The S&P 500 LargeCaps was up 0.3%, while the S&P 400 MidCaps and the S&P 600 SmallCaps rose 1.6% and 2.0% (chart). The Russell 2000 SmallCaps rose 2.0% as well.