If you're interested in broad exposure to the Mid Cap Growth segment of the US equity market, look no further than the Vanguard Mid-Cap Growth Index Fund ETF Shares (VOT) , a passively managed exchange traded fund launched on August 17, 2006.The fund is sponsored by Vanguard. It has amassed assets over $17.85 billion, making it one of the largest ETFs attempting to match the Mid Cap Growth segment of the US equity market.Why Mid Cap GrowthCompared to large and small cap companies, mid cap businesses tend to ...