JDST provides geared inverse exposure (-2x) to the MVIS Global Junior Gold Miners Index, a cap-weighted index of global gold mining companies that derive at least 50% of their revenue from gold or silver mining activities. The index caps exposure to silver mining firms at 20% during each quarterly review. The term junior refers to the size of these firms, which are considered small-caps by the index provider. Overall, this tends to be a volatile segment. Like most inverse and leveraged products (including sister fund JNUG, which provides 2x exposure to the same index), JDST's exposure is reset daily. The fund is therefore designed to be used as a tactical trading tool. You must regularly reset your exposure to get the multiple if you hold the fund for more than a day. Prior to March 31, 2020, the fund provided -3x exposure to the same index.