The SPDR S&P Biotech ETF (XBI) made its debut on 01/31/2006, and is a smart beta exchange traded fund that provides broad exposure to the Health Care ETFs category of the market.What Are Smart Beta ETFs?The ETF industry has traditionally been dominated by products based on market capitalization weighted indexes that are designed to represent the market or a particular segment of the market.Investors who believe in market efficiency should consider market cap indexes, as they replicate market returns in a lo ...