Alexander Ilyasov, ProShare Advisors: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. ProFund Advisors LLC: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. Ryan Dofflemeyer, ProShare Advisors: Portfolio Manager since January 2011, and a registered associated person and an NFA associate member of ProShares Capital Management LLC since October 2010.

In the event an order is cancelled, the Authorized Participant will be responsible for reimbursing the Fund for all costs associated with cancelling the order, including costs for repositioning the portfolio, provided the Authorized Participant shall not be responsible for such costs if the order was cancelled for reasons outside the Authorized Participant’s control or the Authorized Participant was not otherwise responsible or at fault for such cancellation. Upon written notice to the Distributor, such cancelled order may be resubmitted the following Business Day, with a newly constituted Portfolio Deposit or Fund Securities to reflect the next calculated NAV.
The Fund expects to gain exposure to bitcoin futures contracts by investing a portion of its assets in a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands (the “Subsidiary”). The Subsidiary is not registered under the 1940 Act and, unless otherwise noted in this Prospectus, is not subject to all of the investor protections of the 1940 Act. Thus, the Fund, as the sole investor in the subsidiary, will not have all of the protections offered to shareholders of registered investment companies.
Yes but ... in cryptocurrencies? If you had borrowed 100 bitcoins to finance your working capital needs a year ago, you'd have financed about $79,000 worth of working capital. If you had to pay back 112 bitcoins today, that would come to a bit over $2 million, a dollar interest rate of over 2,400 percent. (If you'd borrowed ether you'd be paying over 12,000 percent.) Unless your working capital was bitcoin, you will not be able to pay back that loan. The lesson here is: Probably don't borrow an asset caught in a massive speculative frenzy to fund your working capital needs.

It bears repeating -- when trading futures on leverage, you are not "borrowing" the money, so you don't have to pay a financing rate on your positions. Even though you are 100x exposed, you don't have to pay 100x financing (unless you're trading the perpetual swap, which is not a futures contract, but has similar characteristics). Since bitcoin futures do tend to trade at a premium, you are in a way paying an implied interest rate in the contract, because if you want to go long, you have to pay above spot, so you pay the interest up front in the contract, in a way.

Coinbase, headquartered in San Francisco, is an online bitcoin broking exchange which caters to US, Canada, Europe, UK, Australia, Singapore. Up to 150 US dollars and pounds can be bought on Coinbase on a daily basis. It charges a 3.99% on all the exchanges via credit or debit card. Coinbase offers very high limits. Limits depend on your account level, which is determined by how much information you have verified. Fully verified U.S. customers may buy up to $50,000 worth of bitcoin daily.
This may sound like an unfair system to those who are used to trading with confidence that their profits are settled in full, but it's a compromise that has been made in order to offer the high leverage. If you want to guarantee that your profits are not reduced by any socialised loss, then use CryptoFacilities or Coinpit. They use a "termination" procedure in the event of a margin call not being filled. This simply terminates the contract and sends the portfolio value of the losing counterparty to the winning counterparty. It's worth noting that the system has been incredibly robust, with very minimal socialised losses being triggered on OKCoin and none on BitMEX as of November 2015.
Orders to redeem Creation Units outside the Clearing Process (other than for Global Fund orders), including all cash-only redemptions, must be delivered through a DTC Participant that has executed the Authorized Participant Agreement. A DTC Participant who wishes to place an order for redemption of Creation Units to be effected outside the Clearing Process need not be a “participating party” under the Authorized Participant Agreement, but such orders must state that the DTC Participant is not using the Clearing Process and that the redemption of Creation Units will instead be effected through a transfer of Shares directly through DTC. A redemption order for a Fund must be received by the cut-off times set forth in “Redemption Cut-Off Times” above. The order must be accompanied or preceded by the requisite number of Shares of Funds specified in such order, which delivery must be made through DTC to the Custodian by the second Business Day (T+3) following such transmittal date. All other procedures set forth in the Authorized Participant Agreement must be properly followed in order to receive the next determined NAV.
Decentralized cryptocurrency is produced by the entire cryptocurrency system collectively, at a rate which is defined when the system is created and which is publicly known. In centralized banking and economic systems such as the Federal Reserve System, corporate boards or governments control the supply of currency by printing units of fiat money or demanding additions to digital banking ledgers. In case of decentralized cryptocurrency, companies or governments cannot produce new units, and have not so far provided backing for other firms, banks or corporate entities which hold asset value measured in it. The underlying technical system upon which decentralized cryptocurrencies are based was created by the group or individual known as Satoshi Nakamoto.[28]

SEI Investments Distribution Co. (“SEI”) serves as the distributor and principal underwriter in all fifty states and the District of Columbia. SEI is located at One Freedom Valley Drive, Oaks, PA 19456. The Distributor has no role in determining the investment policies of the Trust or any of the Funds, or which securities are to be purchased or sold by the Trust or any of the Funds. For the fiscal years ended May 31, 2015, May 31, 2016 and May 31, 2017, ProShare Advisors paid $1,858,542, $787,325, and $769,839 respectively, to the Distributor as compensation for services.
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.
For example, you can enter a Bitcoin futures contract with Mortimer Duke saying that you will sell him 1 BTC on March 30, 2018, for the price of 5,000 USD per BTC. (In the actual CME futures contracts, the limit for one contract is 5 BTC, but we will stick with 1 BTC now for the purposes of easy explanation.) You enter into this contract on an exchange like CME.

The audited Financial Statements, for each Fund that commenced operations prior to May 31, 2017, and the report of PricewaterhouseCoopers LLP, as independent registered public accounting firm, for the fiscal year ended May 31,2017, that appear in the Annual Report to shareholders dated May 31, 2017, are hereby incorporated by reference in this SAI. The Annual Report to shareholders is delivered with this SAI to shareholders requesting this SAI.
Created by Charlie Lee, a former Google engineer, Litecoin is an open-source payment network that operates on a global scale. It is not controlled by any centralized power, and it uses the “scrypt” as proof-of-work. It is similar to Bitcoin but has the advantage of offering a faster rate of generation and therefore faster transactions. This is one of the main reasons why its enthusiasts continue to invest or hold onto the coin even after finding out that its founder sold his stack.
The CFE has determined that if the Bitcoin Network is forked and a new blockchain is created, the form of bitcoin on which CFE bitcoin futures contracts and their final settlement values will be based is the form of bitcoin in U.S. dollars traded on the Gemini Exchange. The Gemini Exchange has indicated that it will support the network that has the greatest cumulative computational difficulty for the forty-eight hour period following a given fork. If the Gemini Exchange is unable to make a conclusive determination about which network has the greatest cumulative computational difficulty after forty-eight hours, or Gemini determines in good faith that this is not a reasonable criterion upon which to make a determination, the Gemini Exchange will support the network which it deems in good faith is most likely to be supported by a greater number of users and miners. The Gemini Exchange has indicated it will consult with CFE in the event of a fork. If the Gemini Exchange were to offer trading in multiple forms of bitcoin in U.S. dollars, the CFE would designate the form of bitcoin traded on the Gemini Exchange that would serve as the basis for CFE bitcoin futures contracts and their final settlement values.
Yields on U.S. government securities depend on a variety of factors, including the general conditions of the money and bond markets, the size of a particular offering, and the maturity of the obligation. Debt securities with longer maturities tend to produce higher yields and are generally subject to potentially greater capital appreciation and depreciation than obligations with shorter maturities and lower yields. The market value of U.S. government securities generally varies inversely with changes in market interest rates. An increase in interest rates, therefore, would generally reduce the market value of a Fund’s portfolio investments in U.S. government securities, while a decline in interest rates would generally increase the market value of a Fund’s portfolio investments in these securities.
The proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions. The scheme is largely dependent on the coin, and there's currently no standard form of it. Some cryptocurrencies use a combined proof-of-work/proof-of-stake scheme.[18]
So far, these derivatives market have only been a niche occupied by crypto enthusiasts. That is until one of the newcomers, Crypto Facilities, and an incumbent in the derivatives market have joined forces: Crypto Facilities and the CME Group. The CME Group (controlling, for example, the Chicago Mercantile Exchange that has been around for more than a century) is a large-scale business that is officially regulated and audited by the US financial authorities. It settles its contracts in fiat money rather than cryptocurrency, thus enabling non-crypto experts to speculate on Bitcoin.