Designed to provide broad exposure to the Style Box - Small Cap Blend category of the market, the iShares U.S. Small-Cap Equity Factor ETF (SMLF) is a smart beta exchange traded fund launched on 04/28/2015.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.Market cap weighted indexes offer a low-cost, convenient, and transparent way of replicatin ...