Making its debut on 11/15/2007, smart beta exchange traded fund Invesco Fundamental High Yield Corporate Bond ETF (PHB) provides investors broad exposure to the High-Yield/Junk Bond 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 ...