The State Street SPDR S&P Retail ETF (XRT) was launched on 06/19/2006, and is a smart beta exchange traded fund designed to offer broad exposure to the Consumer Discretionary ETFs category of the market.What Are Smart Beta ETFs?Market cap weighted indexes were created to reflect the market, or a specific segment of the market, and the ETF industry has traditionally been dominated by products based on this strategy.A good option for investors who believe in market efficiency, market cap weighted indexes offe ...