VB invests based on CRSP US Small Cap Index, and VIOO invests based on S&P SmallCap 600 Index. Click here to find out which ETF I prefer.

T he Vanguard Small-Cap ETF (VB) was launched on 01/26/2004, and is a passively managed exchange traded fund designed to offer broad exposure to the Small Cap Blend segment of the US equity market.