•   The bitcoin exchanges on which bitcoin trades are relatively new and, in most cases, largely unregulated and, therefore, may be more exposed to fraud and security breaches than established, regulated exchanges for other products. Over the past several years, a number of Bitcoin Exchanges have been closed due to fraud, failure, security breaches or governmental regulations. The nature of the assets held at Bitcoin Exchanges make them appealing targets for hackers and a number of Bitcoin Exchanges have been victims of cybercrimes. No Bitcoin Exchange is immune from these risks. Fraudulent activity can increase volatility and have an adverse effect on the price of bitcoin, the general acceptance of bitcoin as an investment or means of currency and could have a negative impact on the bitcoin futures contracts in which the Fund invests and the value of the Fund.

ProShare Advisors believes that its compensation program is competitively positioned to attract and retain high-caliber investment professionals. The compensation package for portfolio managers consists of a fixed base salary, an annual incentive bonus opportunity and a competitive benefits package. A portfolio manager’s salary compensation is designed to be competitive with the marketplace and reflect a portfolio manager’s relative experience and contribution to the firm. Fixed base salary compensation is reviewed and adjusted annually to reflect increases in the cost of living and market rates.
  •   Intellectual property rights claims may adversely affect the operation of the Bitcoin Network. Third parties may assert intellectual property rights claims relating to the operation of the Bitcoin Network. Regardless of the merit of any intellectual property or other legal action, any threatened action that reduces confidence in the Bitcoin Network’s long-term viability or the ability of end-users to hold and transfer bitcoin may adversely affect the price of bitcoin and adversely affect the price of the Bitcoin Futures Contracts held by the Fund.
When a Fund purchases or sells a futures contract, or buys or sells an option thereon, the Fund “covers” its position. To cover its position, a Fund may enter into an offsetting position, earmark or segregate with its custodian bank or on the official books and records of the Fund cash or liquid instruments (marked-to-market on a daily basis) that, when added to any amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract or otherwise “cover” its position. When required by law, a Fund will segregate liquid assets in an amount equal to the value of the Fund’s total assets committed to the consummation of such futures contracts. Obligations under futures contracts so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities.

This Statement of Additional Information (“SAI”) is not a prospectus. It should be read in conjunction with the Prospectus of ProShares Trust (the “Trust”), dated October 1, 2017, the Prospectus dated November 16, 2017 for ProShares Decline of the Retail Store ETF, the Prospectus dated November 16, 2017 for ProShares Long Online/Short Stores ETF, the Prospectus dated             , 2018 for ProShares Bitcoin Futures Strategy ETF, the Prospectus dated             , 2018 for ProShares Short Bitcoin Futures Strategy ETF, the Prospectus dated             , 2018 for ProShares Blockchain/Bitcoin Strategy ETF, and the Prospectus dated             , 2018 for ProShares Bitcoin Futures/Equity Strategy ETF each as may be amended or supplemented, each of which incorporates this SAI by reference. A copy of the Prospectuses and a copy of the Annual Report to shareholders for the Funds that have completed a fiscal year are available, without charge, upon request to the address above, by telephone at the number above, or on the Trust’s website at www.ProShares.com. The Financial Statements and Notes contained in the Annual Report to Shareholders for the fiscal year ended May 31, 2017 are incorporated by reference into and are deemed part of this SAI. The principal U.S. national stock exchange on which all Funds (except those noted below) identified in this SAI are listed is NYSE Arca. The S&P MidCap 400 Dividend Aristocrats ETF, the Russell 2000 Dividend Growers ETF, the ProShares MSCI Emerging Markets Dividend Growers ETF, the ProShares S&P 500 Dividend Aristocrats ETF, the ProShares MSCI EAFE Dividend Growers ETF, the MSCI Europe Dividend Growers ETF, the Morningstar Alternatives Solution ETF, the Global Listed Private Equity ETF, the Large Cap Core Plus, the High Yield—Interest Rate Hedged, the Investment Grade—Interest Rate Hedged, the Short Term USD Emerging Markets Bond ETF, the ProShares Managed Futures Strategy ETF, the Merger ETF, K-1 Free Crude Oil Strategy ETF and the CDS Short North American HY Credit ETF are listed on the Bats BZX Exchange, Inc. The UltraPro Short QQQ®, the UltraShort Nasdaq Biotechnology, the UltraPro Short Nasdaq Biotechnology, the UltraPro QQQ®, the Ultra Nasdaq Biotechnology the UltraPro Nasdaq Biotechnology and the Equities for Rising Rates ETF are listed on The NASDAQ Stock Market.
Maintenance Margin - this is the % of the position value you have to have in your account at the very minimum to avoid being Margin Called.  In some exchanges, margin call will mean you get notified and must deposit more margin to avoid liquidation (like CryptoFacilities). On other exchanges you will at this point be liquidated out of your position. So if maintenance margin is 5%, then the 0.05 BTC of your initial margin will need to be kept for the position to be alive.

When a market price is not readily available, each Fund’s investments are valued at fair value in good faith under procedures established by, and under the general supervision and responsibility of, the Board. The use of a fair valuation method may be appropriate if, for example: (i) market quotations do not accurately reflect fair value of an investment; (ii) an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded; (iii) a trading halt closes an exchange or market early; or (iv) other events result in an exchange or market delaying its normal close. This procedure incurs the unavoidable risk that the valuation may be higher or lower than the securities might actually command if the Funds sold them. See the SAI for more details.
When you display any broker’s profile page on the CME list above, you will see on the right hand side this broker’s specialties (a list of industries and/or financial products). As of this articles publication (Nov. 24, 2017), only one broker has added Bitcoin to his list of specialties: Level Trading Field LLC. However, this does not mean that the other brokers won’t handle Bitcoin futures. We expect that more of them will adopt this specialty as soon as Bitcoin futures are on the market.
Bitcoin has been on a tear this year, surging at least 1,000 percent in 2017. As the cryptocurrency gained even more attention from investors recently, the Commodity Futures Trading Commission announced on Friday that it would allow the CME and Cboe to launch bitcoin futures. The Cboe plans to launch on Dec. 10 and the CME intends to launch on Dec. 18.
The Board is currently composed of four Trustees, including three Independent Trustees who are not “interested persons” of the Funds, as that term is defined in the 1940 Act (each an “Independent Trustee”). In addition to four regularly scheduled meetings per year, the Board holds executive sessions (with and without employees of the Advisor), special meetings, and/or informal conference calls relating to specific matters that may require discussion or action prior to its next regular meeting. The Independent Trustees have retained “independent legal counsel” as the term is defined in the 1940 Act.
  •   an investment company, or person that would be an investment company but for the exclusions provided by sections 3(c)(1) and 3(c)(7) of the 1940 Act, having the same investment adviser or principal underwriter as the Trust or having an investment adviser or principal underwriter that directly or indirectly controls, is controlled by, or is under common control with the Advisor or principal underwriter of the Trust;
Because only a few regulations implementing the straddle rules have been promulgated, the consequences of such transactions to the Funds are not entirely clear. The straddle rules may increase the amount of short-term capital gain realized by a Fund, which is taxed as ordinary income when distributed to shareholders. Because application of the straddle rules may affect the character of gains or losses, defer losses and/or accelerate the recognition of gains or losses from the affected straddle positions, the amount which must be distributed to shareholders as ordinary income or long-term capital gain may be increased or decreased substantially as compared to a Fund that did not engage in such transactions.
•   Valuation Risk — In certain circumstances, portfolio holdings may be valued using techniques other than market quotations. The value established for a portfolio holding may be different from what would be produced through the use of another methodology or if it had been priced using market quotations. Portfolio holding that are valued using techniques other than market quotations, including “fair valued” securities, may be subject to greater fluctuation in their value from one day to the next than would be the case if market quotations were used. In addition, there is no assurance that the Fund could sell a portfolio holding for the value established for it at any time, and it is possible that the Fund would incur a loss because a portfolio holding is sold at a discount to its established value.

  •   Bitcoin is available for trading 24-hours a day globally and, as such, the price of bitcoin may change dramatically when the market for bitcoin futures contracts is closed or when Fund shares are not available for trading on the Exchange. The price of bitcoin may change dramatically at times when investors are unable to buy or sell Fund shares.
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.
Corporate debt securities carry both credit risk and interest rate risk. Credit risk is the risk that a Fund could lose money if the issuer of a corporate debt security is unable to pay interest or repay principal when it is due. Some corporate debt securities that are rated below investment-grade are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities. The credit risk of a particular issuer’s debt security may vary based on its priority for repayment. For example, higher ranking (senior) debt securities have a higher priority than lower ranking (subordinated) securities. This means that the issuer might not make payments on subordinated securities while continuing to make payments on senior securities. In addition, in the event of bankruptcy, holders of higher-ranking senior securities may receive amounts otherwise payable to the holders of more junior securities. Interest rate risk is the risk that the value of certain corporate debt securities will tend to fall when interest rates rise. In general, corporate debt securities with longer terms tend to fall more in value when interest rates rise than corporate debt securities with shorter terms.
Only invest what you can lose. During the recent crash in January 2018, hobby-investors got burned. Reports of frustration and losses came at the cost of broken monitors, smashed laptops, and heavy monetary losses. While the rules are in more particular order of importance, it’s safe to assume that this is the most important rule, the rule to rule the rules. As soon as your money is converted into cryptocurrency, consider it lost forever. There is absolutely no guarantee you can get it back. Losses don’t simply come from dips in the market; extraordinary factors such as hacks, bugs, and government regulation can mean you’ll never see any of your money again. If you are investing money you can’t afford to lose, you need to take a step back and re-evaluate your current financial situation, because what you’re about to do is an act of desperation. This includes: using credit cards, taking out mortgages, applying for loans, or selling everything and traveling the world (as glamorous as that sounds).
Equity/Index Swaps. In an equity swap, payments on one or both sides are linked to the performance of equities or an equity index. Equity swaps are normally used to (1) initiate and maintain long or short equity exposures either in an index or a specific stock portfolio; (2) temporarily eliminate exposure to an equity portfolio without disturbing the underlying equity position; or (3) increase, reduce, or eliminate market exposure to a single issue or a narrow stock portfolio or obtain greater diversification for a limited period of time without disturbing an underlying position.

Commonly, investments subject to interest rate risk will decrease in value when interest rates rise and increase in value when interest rates decline. The value of securities with longer maturities may fluctuate more in response to interest rate changes than securities with shorter maturities. A wide variety of factors can cause interest rates to rise (e.g., central bank monetary policies, inflation rates, general economic conditions, etc.). This risk may be elevated under current economic conditions because interest rates are at historically low levels. Returns on investment in debt instruments may trail the returns on other investment options, including investments in equity securities.
The consideration for purchase of a creation unit of a Fund may, at the discretion of the Advisor, consist of the in-kind deposit of a designated portfolio of securities (“Deposit Securities”) constituting a representation of the index for the Fund, the Balancing Amount, and the appropriate Transaction Fee (collectively, the “Portfolio Deposit”). The “Balancing Amount” will be the amount equal to the differential, if any, between the total aggregate market value of the Deposit Securities (or in the case of redemptions, the total aggregate market value of the Fund Securities as defined below) and the NAV of the Creation Units being purchased and will be paid to, or received from, the Trust after the NAV has been calculated. The Advisor may restrict purchases of Creation Units to be on an in-kind basis at any time and without prior notice, in all cases at the Advisor’s discretion.
Transaction fees for cryptocurrency depend mainly on the supply of network capacity at the time, versus the demand from the currency holder for a faster transaction. The currency holder can choose a specific transaction fee, while network entities process transactions in order of highest offered fee to lowest. Cryptocurrency exchanges can simplify the process for currency holders by offering priority alternatives and thereby determine which fee will likely cause the transaction to be processed in the requested time.
Corporate debt securities carry both credit risk and interest rate risk. Credit risk is the risk that a Fund could lose money if the issuer of a corporate debt security is unable to pay interest or repay principal when it is due. Some corporate debt securities that are rated below investment-grade are generally considered speculative because they present a greater risk of loss, including default, than higher quality debt securities. The credit risk of a particular issuer’s debt security may vary based on its priority for repayment. For example, higher ranking (senior) debt securities have a higher priority than lower ranking (subordinated) securities. This means that the issuer might not make payments on subordinated securities while continuing to make payments on senior securities. In addition, in the event of bankruptcy, holders of higher-ranking senior securities may receive amounts otherwise payable to the holders of more junior securities. Interest rate risk is the risk that the value of certain corporate debt securities will tend to fall when interest rates rise. In general, corporate debt securities with longer terms tend to fall more in value when interest rates rise than corporate debt securities with shorter terms.
BitMEX is a derivatives exchange that offers leveraged contracts that are bought and sold in Bitcoin. This is a platform that provides trading in bitcoin derivatives. The derivative traded is a perpetual swap contract, which is a derivative product similar to a traditional Futures Contract. Swap contracts trade like spots, tracking the underlying assets.
If anything, the problem seems to start with incredibly lax risk management at this exchange.  According to the OKEX statement, the risk management team 'immediately' contacted the client to reduce the size of the trade - begging the question - how did their risk management system allow the trade to occur in the first place?  On the bright side, something like that should be easy to fix, but it is indicative, potentially of how many simple things are being overlooked in the rush to make money from crypto trading.
The Fund pays transaction costs, such as commissions, when it buys and sells securities (including through the Subsidiary, as defined below), or “turns over” its portfolio. A higher portfolio turnover rate for the Fund or the Subsidiary may indicate higher transaction costs and may result in higher taxes when the Fund’s shares are held in a taxable account. These costs, which are not reflected in Annual Fund Operating Expenses or in the example above, affect the Fund’s performance. The Fund has not yet commenced operations as of the date of this Prospectus. Thus, no portfolio turnover information is provided for this Fund.

Basically, if you trade margin spot on a site like Kraken or Bitfinex, you will pay financing fees while you hold the position open. The same goes for CFD sites like WhaleClub or 1Broker. With bitcoin futures, you are able to trade margin without expending interest, because counterparties to the contract pay a fee to open and close the contract, and the exchange just manages the risk, so no money is really being lent!
Under a Rule 12b-1 Distribution Plan (the “Plan”) adopted by the Board, each Fund may pay its distributor and financial intermediaries, such as broker-dealers and investment advisors, up to 0.25% on an annualized basis of the average daily net assets of a Fund as reimbursement or compensation for distribution related activities with respect to the Funds. Because these fees are paid out of each Fund’s assets on an on-going basis, over time these fees will increase the cost of your investment and may cost you more than paying other types of sales charges. For the prior fiscal year, no payments were made by the fund under the Plan.
Total Return Swaps. Total return swaps are used either as substitutes for owning the physical securities that comprise a given market index or as a means of obtaining non-leveraged exposure in markets where securities are not available. “Total return” refers to the payment (or receipt) of an index’s total return, which is then exchanged for the receipt (or payment) of a floating interest rate. Total return swaps provide the Fund with the additional flexibility of gaining exposure to a market or sector index by using the most cost-effective vehicle available.
Each Fund, except for the S&P 500 Dividend Aristocrats ETF, the S&P MidCap 400 Dividend Aristocrats ETF, the Russell 2000 Dividend Growers ETF, the MSCI EAFE Dividend Growers ETF, the MSCI Europe Dividend Growers ETF, the MSCI Emerging Markets Dividend Growers ETF, the DJ Brookfield Global Infrastructure ETF, the Equities for Rising Rates ETF, the S&P 500 Ex-Energy ETF, the S&P 500 Ex-Financials ETF, the S&P 500 Ex-Health Care ETF, the S&P 500 Ex-Technology ETF, the High Yield—Interest Rate Hedged, the Investment Grade—Interest Rate Hedged and the Short Term USD Emerging Markets Bond ETF, is a “non-diversified” series of the Trust. A Fund’s classification as a “non-diversified” investment company means that the proportion of the Fund’s assets that may be invested in the securities of a single issuer is not limited by the 1940 Act. Notwithstanding each Fund’s status as a “non-diversified” investment company under the 1940 Act, each Fund intends to qualify as a RIC accorded special tax treatment under the Code, which imposes its own diversification requirements on these Funds that are less restrictive than the requirements applicable to the “diversified” investment companies under the 1940 Act. A Fund’s ability to pursue its investment strategy may be limited by that Fund’s intention to qualify as a RIC and its strategy may bear adversely on its ability to so qualify. For more details, see “Taxation” below. With respect to a “non-diversified” Fund, a relatively high percentage of such a Fund’s assets may be invested in the securities of a limited number of issuers, primarily within the same economic sector. That Fund’s portfolio securities, therefore, may be more susceptible to any single economic, political, or regulatory occurrence than the portfolio securities of a more diversified investment company.
With BitVC and OKCoin you can hold simultaneous long and short positions on the same contract. In BitMEX you can not. Technically it makes no sense to hold opposite simultaneous positions because it just cancels each other out. You may as well just close the position instead. There are some who still prefer, for psychological reasons, to use this and wrongly call it a "hedge", but really you're better off saving the trading fees and just getting out of a position if your outlook on a trade has changed.
“One of the biggest issues when it comes to investing institutionally in digital assets is banks and larger institutions can’t hold an unregulated instrument in their balance sheet, and a futures contract is something they can hold,” said Gabor Gurbacs, director of digital-asset strategy at VanEck Associates Corp. With futures, “you don’t hold the physical bitcoin, which solves custody issues and counterparty risks with these less-regulated exchanges.”

As we have seen above, a futures contract has an expiration date. This is the date on which you can purchase the ton of pork bellies for 1,000 USD – this is called a physical settlement. Alternatively, futures contracts can be settled with cash as well. In these contracts, you receive the difference between the current price of the underlying asset and the price in your contract as cash.
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