USD, as a levered product, is not a buy-and-hold ETF, it's a short-term tactical instrument. Investors get concentrated exposure to the biggest companies that engage in the production and distribution of semiconductors and other integrated chips, as well as other related products such as semiconductor capital equipment and motherboards. Like many levered funds, USD promises 2x exposure only for one day. Over longer periods, returns can vary significantly from 2x exposure to its underlying index.