If you're interested in broad exposure to the Small Cap Blend segment of the US equity market, look no further than the Invesco RAFI US 1500 Small-Mid ETF (PRFZ) , a passively managed exchange traded fund launched on 09/20/2006.The fund is sponsored by Invesco. It has amassed assets over $2.43 billion, making it one of the larger ETFs attempting to match the Small Cap Blend segment of the US equity market.Why Small Cap BlendWith more potential comes more risk, and small cap companies, with market capitaliza ...