Designed to provide broad exposure to the Mid Cap Growth segment of the US equity market, the SPDR S&P 400 Mid Cap Growth ETF (MDYG) is a passively managed exchange traded fund launched on November 8, 2005.The fund is sponsored by State Street Global Advisors. It has amassed assets over $2.37 billion, making it one of the average sized 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 have highe ...