If you're interested in broad exposure to the Large Cap Blend segment of the US equity market, look no further than the Vanguard Mega Cap ETF (MGC) , a passively managed exchange traded fund launched on 12/17/2007.The fund is sponsored by Vanguard. It has amassed assets over $7.33 billion, making it one of the largest ETFs attempting to match the Large Cap Blend segment of the US equity market.Why Large Cap BlendCompanies that find themselves in the large cap category typically have a market capitalization ...