Designed to provide broad exposure to the Health Care ETFs category of the market, the Invesco S&P 500 Equal Weight Health Care ETF (RSPH) is a smart beta exchange traded fund launched on 11/01/2006.What Are Smart Beta ETFs?For a long time now, the ETF industry has been flooded with products based on market capitalization weighted indexes, which are designed to represent the broader market or a particular market segment.A good option for investors who believe in market efficiency, market cap weighted indexe ...