The investment seeks daily investment results, before fees and expenses, that correspond to two times the inverse (-2x) of the daily performance of the Bloomberg WTI Crude Oil SubindexSM. The fund seeks to meet its investment objective by investing, under normal market conditions, in any one of, or combinations of, Financial Instruments (including swap agreements, futures contracts, forward contracts, and option contracts) based on WTI sweet, light crude oil. It will not invest directly in oil.