This ETF offers exposure to small cap U.S. stocks, an asset class that is included in most long-term portfolios and can be useful for tactical traders looking to implement a tilt towards riskier securities. RWJ is one of dozens of options for small cap exposure through ETFs, distinguishing itself from the alternatives though the unique weighting methodology employed. The related benchmark consists of all the stocks included in the S&P SmallCap 600, but determines the individual allocations based on top line revenue (as opposed to market capitalization). That methodology may be appealing for investors who see value in a strategy that shifts exposure towards companies with low price-to-sales multiples, and may also be appealing for those looking to utilize alternatives to market cap-weighting (which has a tendency to overweight overvalued stocks, and underweight undervalued companies). There are other ETFs out there for alternative weighting approaches within the small cap space; DES weights holdings based on cash dividends paid, while EES uses earnings to construct the underlying portfolio. RWJ is slightly more expensive than some of the cap-weighted alternatives, but investors who believe the revenue-weighting approach has the potential to add value over the long run will find the expense differentials to be minimal. This fund may be worth considering as an alternative to products such as IWM and IJR.