As noted above, swap agreements typically are settled on a net basis, which means that the payment streams are netted out, with the Fund receiving or paying, as the case may be, only the net amount of the two payments. Payments may be made at the conclusion of a swap agreement or periodically during its term. The timing and character of any income, gain or loss recognized by a Fund on the payment or payments made or received on a swap will vary depending upon the terms of the particular swap. Swap agreements do not involve the delivery of securities or other underlying assets. Accordingly, the risk of loss with respect to swap agreements is limited to the net amount of payments that a Fund is contractually obligated to make. If the other party to a swap agreement defaults, a Fund’s risk of loss consists of the net amount of payments that such Fund is contractually entitled to receive, if any. The net amount of the excess, if any, of a Fund’s obligations over its entitlements with respect to each swap will be accrued on a daily basis and an amount of cash or liquid assets, having an aggregate NAV at least equal to such accrued excess will be earmarked or segregated by a Fund’s custodian (though, as noted above, in connection with CDS in which a Fund is a “seller”, the Fund will segregate or earmark cash or assets determined to be liquid, with a value at least equal to the full notional amount of the swap (minus any variation margin or amounts owed to the Fund under an offsetting transaction)). Inasmuch as these transactions are entered into for hedging purposes or are offset by earmarked or segregated cash or liquid assets, as permitted by applicable law, the Funds and their Advisor believe that these transactions do not constitute senior securities within the meaning of the 1940 Act, and, accordingly, will not treat them as being subject to a Fund’s borrowing restrictions.

On September 15, 2015, the Conference of State Bank Supervisors finalized their proposed model regulatory framework for state regulation of participants in “virtual currency activities.” The Conference of State Bank Supervisors proposed framework is a non-binding model and would have to be independently adopted, in sum or in part, by state legislatures or regulators on a case-by-case basis. In July 2017, the Uniform Law Commission (the “ULC”), a private body of lawyers and legal academics from the several U.S. states, voted to finalize and approve a uniform model state law for the regulation of virtual currency businesses, including bitcoin (the “Uniform Virtual Currency Act”). Having been approved by the ULC, the Uniform Virtual Currency Act now goes to each of the U.S. states and territories for their consideration and would have to be independently adopted, in sum or in part, by state legislatures or regulators on a case-by-case basis.

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.
Futures contracts with a longer term to expiration may be priced higher than futures contracts with a shorter term to expiration, a relationship called “contango.” Conversely, futures contracts with a longer term to expiration may be priced lower than futures contracts with a shorter term to expiration, a relationship called “backwardation.” Contango and backwardation have different impacts on ProShares Bitcoin/Blockchain ProShares Bitcoin Futures Strategy ETF, ProShares Bitcoin Futures/Equity Strategy ETF and ProShares Bitcoin/Blockchain Strategy ETF (each, a “Bitcoin Fund”) and ProShares Short Bitcoin Futures Strategy ETF (the “Short Bitcoin Fund”).
A Fund may invest in one or more exchange-traded funds that invest in commodities or options, futures, or forwards with respect to commodities, and are treated as QPTPs for federal income tax purposes. As noted above, a Fund is limited to investing no more than 25% of the value of its total assets in the securities of one or more QPTPs. Although income from QPTPs is generally qualifying income, if an ETF intending to qualify as a QPTP fails to so qualify and is treated as a partnership for U.S. federal income tax purposes, a portion of its income may not be qualifying income. It is also possible that an ETF intending to qualify as a QPTP will be treated as a corporation for federal income tax purposes. In such a case, it will be potentially liable for an entity-level corporate income tax, which will adversely affect the return thereon. There can be no guarantee that any ETF will be successful in qualifying as a QPTP. In addition, there is little regulatory guidance concerning the application of the rules governing qualification as a QPTP, and it is possible that future guidance may adversely affect the qualification of ETFs as QPTPs. A Fund’s ability to pursue an investment strategy that involves investments in QPTPs may be limited by that Fund’s intention to qualify as a RIC, and may bear adversely on that Fund’s ability to so qualify.
An initial coin offering (ICO) is a controversial means of raising funds for a new cryptocurrency venture. An ICO may be used by startups with the intention of avoiding regulation. However, securities regulators in many jurisdictions, including in the U.S., and Canada have indicated that if a coin or token is an "investment contract" (e.g., under the Howey test, i.e., an investment of money with a reasonable expectation of profit based significantly on the entrepreneurial or managerial efforts of others), it is a security and is subject to securities regulation. In an ICO campaign, a percentage of the cryptocurrency (usually in the form of "tokens") is sold to early backers of the project in exchange for legal tender or other cryptocurrencies, often bitcoin or ether.[62][63][64]
There's a lot of ins and outs which can get confusing in arbitrage trading. We won't go into the technicals of why futures contracts trade at a premium to spot price. You can read a full explanation here. If it's not of interest to you, all you need to know is that there's a tendency, the further out in time the futures contract expires, for the premium to spot to be higher and higher in nominal percentage terms.