State Street SPDR MSCI USA StrategicFactors ETF(AMEX:QUS)

QUS follows a multifactor strategy to target the large- and mid-cap segments of the US equity market. The fund tracks an index consisting of three single-factor subindexes MSCI USA Value Weighted, MSCI USA Minimum Volatility and MSCI USA Quality, all of which are equally weighted at semi-annual rebalance. The index also aims to meet the Regulated Investment Company (RIC) requirements by employing a capping methodology, so that no individual constituent exceeds 25% of index weight and the aggregate weight of constituents with over 5% weight in the index are capped at 50% weight of the portfolio. While QUS is not literally a fund of funds, it can be thought of as such since there are stand-alone ETFs tracking each of its subindexes.