The BofA Merrill Lynch Marks are trademarks of Merrill Lynch, Pierce, Fenner & Smith Incorporated or its affiliates and have been licensed for use by Trust. S&P, MSCI and Russell, respectively, are trademarks of Standard & Poor’s, a division of The McGraw-Hill Companies, Inc. and Standard & Poor’s Financial Services LLC, MSCI, Inc. and Frank Russell Company and have been licensed for use by BofA Merrill Lynch.

Currently, Bitcoin futures have very high margin requirements. The Cboe requires 40% of the notional amount for maintenance margin, the CME requires 43%. Your broker will likely require more than that. The culprit behind these high requirements is Bitcoin’s high volatility—until that calms down the exchanges will protect themselves by requiring a bunch of up-front money. If you don’t come up with the money for a margin call they want to close out your position without leaving a negative balance.
The Fund is different from most exchange-traded funds in that it seeks inverse, or “short”, exposure. The Fund may not be suitable for all investors and should be used only by knowledgeable investors. Shareholders should actively manage and monitor their investments, as frequently as daily. As with any shorting strategy that is periodically rebalanced, the return of the Fund over time will likely differ from the inverse of the return of a similar static long investment.
Source: MV Index Solutions GmbH (MVIS®). MVIS is a wholly owned subsidiary of Van Eck Associates Corporation. Data as of December 8, 2017 (synthesized data from BitMEX, OKCoin, CryptoFacilities, and BTCC which represents non-U.S. listed bitcoin futures trading on these exchanges). Not intended to be a forecast of future events, a guarantee of future results or investment advice. Current market conditions may not continue.  
Amounts not distributed on a timely basis in accordance with a prescribed formula are subject to a nondeductible 4% excise tax at the Fund level. To avoid the tax, each Fund must distribute during each calendar year an amount generally equal to the sum of (1) at least 98% of its ordinary income (not taking into account any capital gains or losses) for the calendar year, (2) at least 98.2% of its capital gains in excess of its capital losses (adjusted for certain ordinary losses) for a one-year period generally ending on October 31
uncleared swaps. If a counterparty becomes bankrupt or otherwise fails to perform its obligations due to financial difficulties, a Fund could suffer significant losses on these contracts and the value of an investor’s investment in the Fund may decline. OTC swaps of the type that may be utilized by the Fund are less liquid than futures contracts because they are not traded on an exchange, do not have uniform terms and conditions, and are generally entered into based upon the creditworthiness of the parties and the availability of credit support, such as collateral, and in general, are not transferable without the consent of the counterparty.
Each Fund bears all expenses of its operations other than those assumed by ProShare Advisors or the Administrator. Fund expenses include but are not limited to: the investment advisory fee; management services fee; administrative fees, index receipt agent fees, principal financial officer/treasurer services fees; compliance service fees, anti-money laundering administration fees; custodian and accounting fees and expenses, legal and auditing fees; securities valuation expenses; fidelity bonds and other insurance premiums; expenses of preparing and printing prospectuses, proxy statements, and shareholder reports and notices; registration fees and expenses; proxy and annual meeting expenses, if any; licensing fees; listing fees; all federal, state, and local taxes (including, without limitation, stamp, excise, income, and franchise taxes); organizational costs; and Independent Trustees’ fees and expenses.
On October 27, 2017, The New York Times published an article discussing the Centra ICO and its use of celebrity endorsements. For this article, the reporters reached out to Defendant Sharma to discuss his and Defendant Trapani’s perjury indictments on October 5, 2017 stemming from Defendant Trapani’s testimony that Defendant Sharma had only one alcoholic beverage the night he was arrested for driving while under the influence. In response to questions on this topic, Defendant Sharma stated, “I’m obviously not comfortable with that situation,” and added “[b]ut it’s not that I did something so intensely crazy that investors need to worry.” (emphasis added). Thus, Defendant Sharma clearly viewed persons who purchased Centra Tokens in the Centra ICO as “investors.”
In 1998, Wei Dai published a description of "b-money", an anonymous, distributed electronic cash system.[14] Shortly thereafter, Nick Szabo created "bit gold".[15] Like bitcoin and other cryptocurrencies that would follow it, bit gold (not to be confused with the later gold-based exchange, BitGold) was an electronic currency system which required users to complete a proof of work function with solutions being cryptographically put together and published. A currency system based on a reusable proof of work was later created by Hal Finney who followed the work of Dai and Szabo.
Let's not even go into the paradigm shift that this development implies. The growth of a bitcoin futures market positions it even more as a commodity than a currency (in the US, the Commodity Futures Trading Commission regulates futures markets). And even more as an investment asset than a technology that has the potential to change the plumbing of finance.
!! WARNING !!! Note that on CryptoFacilities each contract is denominated by 1 BTC. So if you bought a fraction of BTC you can NOT perform a perfect hedge of the value. If you round the BTC you bought with start capital down, you will have slight overexposure LONG with the left-over BTC. If you round up and short an extra contract, you will have slight overexposure SHORT.