FXU uses a quant-based model to pick stocks that are predicted to outperform the broader US utilities market. In particular, the fund selects companies based on their value and growth factors, and then weights them equally in tiers. This process favors firms on the extreme ends of the style spectrum, and results to a portfolio that has a significant tilt toward mid-caps. FXU also includes a large allocation to telecom companies. Overall, the fund offers a smart beta approach to the US utilities space, instead of providing market-like sector exposure. The index is reconstituted and rebalanced quarterly.