v3.10.0.1

Schedule of Investments - Futures Contracts Sold (Detail) | 6 Months Ended
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Jun. 30, 2018 USD ($) Contract
ProShares UltraPro 3X Short Crude Oil ETF [Member] | Futures Contracts Sold [Member] | WTI Crude Oil NYMEX, Expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 899 |
Notional Amount at Value | $ 65,141,540 |
Unrealized Appreciation (Depreciation) | $ (5,442,454) |
ProShares UltraShort Australian Dollar [Member] | Futures Contracts Sold [Member] | Australian Dollar Fx Currency Futures - CME, expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 205 |
Notional Amount at Value | $ 15,165,900 |
Unrealized Appreciation (Depreciation) | 391,770 |
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts Sold [Member] |  |
Schedule of Investments [Line Items] |  |
Unrealized Appreciation (Depreciation) | $ (22,528,398) |
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts Sold [Member] | VIX Futures - CBOE, expires July 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 9,451 |
Notional Amount at Value | $ 151,452,275 |
Unrealized Appreciation (Depreciation) | $ (18,305,380) |
ProShares Short VIX Short-Term Futures ETF [Member] | Futures Contracts Sold [Member] | VIX Futures - CBOE, expires August 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 6,868 |
Notional Amount at Value | $ 112,463,500 |
Unrealized Appreciation (Depreciation) | $ (4,223,018) |
ProShares Short Euro [Member] | Futures Contracts Sold [Member] | Euro Fx Currency Futures-CME expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 57 |
Notional Amount at Value | $ 8,362,256 |
Unrealized Appreciation (Depreciation) | 87,213 |
ProShares UltraShort Bloomberg Crude Oil [Member] |  |
Schedule of Investments [Line Items] |  |
Unrealized Appreciation (Depreciation) | $ (33,768,200) | [1]
ProShares UltraShort Bloomberg Crude Oil [Member] | Futures Contracts Sold [Member] | WTI Crude Oil NYMEX, Expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 1,028 |
Notional Amount at Value | $ 74,488,880 |
Unrealized Appreciation (Depreciation) | $ (7,161,949) |
ProShares UltraShort Bloomberg Natural Gas [Member] | Futures Contracts Sold [Member] | Natural Gas - NYMEX, expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 465 |
Notional Amount at Value | $ 13,489,650 |
Unrealized Appreciation (Depreciation) | 6,272 |
ProShares UltraShort Gold [Member] |  |
Schedule of Investments [Line Items] |  |
Unrealized Appreciation (Depreciation) | $ 2,276,610 | [2]
ProShares UltraShort Gold [Member] | Futures Contracts Sold [Member] | Gold Futures - COMEX, expires August 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 2 |
Notional Amount at Value | $ 250,900 |
Unrealized Appreciation (Depreciation) | 15,080 |
ProShares UltraShort Silver [Member] |  |
Schedule of Investments [Line Items] |  |
Unrealized Appreciation (Depreciation) | $ 1,452,785 | [2]
ProShares UltraShort Silver [Member] | Futures Contracts Sold [Member] | Silver Futures - COMEX, expires September 2018 [Member] |  |
Schedule of Investments [Line Items] |  |
Number of Contracts | Contract | 2 |
Notional Amount at Value | $ 161,980 |
Unrealized Appreciation (Depreciation) | $ 7,970 |
[1] | Total Return Swap Agreements
[2] | The positions and counterparties herein are as of June 30, 2018. The Funds continually evaluate different counterparties for their transactions and counterparties are subject to change. New counterparties can be added at any time.

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