IVOO Vs. VIOO: In My Opinion, There's A Clear Winner

Small and mid-cap indices (S&P 400, S&P 600) remain undervalued relative to the S&P 500, trading at 15.7x and 15.2x forward PE versus 20.7x. Historically, the S&P 400 and S&P 600 delivered higher EPS growth (10.0%, 10.5%) than the S&P 500 (6.8%), yet suffered multiple contractions. Index composition shifts and rising market cap thresholds mean fewer high-growth, early-stage companies are included in the S&P 400/600.