The term altcoin has various similar definitions. Stephanie Yang of The Wall Street Journal defined altcoins as "alternative digital currencies,"[25] while Paul Vigna, also of The Wall Street Journal, described altcoins as alternative versions of bitcoin.[26] Aaron Hankins of the MarketWatch refers to any cryptocurrencies other than bitcoin as altcoins.[27]
the option to purchase the asset underlying the option at the exercise price if the option is exercised. During the term of the option, the writer may be assigned an exercise notice by the broker-dealer through whom the option was sold. The exercise notice would require the writer to deliver, in the case of a call, or take delivery of, in the case of a put, the underlying asset against payment of the exercise price. This obligation terminates upon expiration of the option, or at such earlier time that the writer effects a closing purchase transaction by purchasing an option covering the same underlying asset and having the same exercise price and expiration date as the one previously sold. Once an option has been exercised, the writer may not execute a closing purchase transaction. To secure the obligation to deliver the underlying asset in the case of a call option, the writer of a call option is required to deposit in escrow the underlying asset or other assets in accordance with the rules of the Options Clearing Corporation (the “OCC”), an institution created to interpose itself between buyers and sellers of options. The OCC assumes the other side of every purchase and sale transaction on an exchange and, by doing so, gives its guarantee to the transaction. When writing call options on an asset, a Fund may cover its position by owning the underlying asset on which the option is written. Alternatively, the Fund may cover its position by owning a call option on the underlying asset, on a share-for-share basis, which is deliverable under the option contract at a price no higher than the exercise price of the call option written by the Fund or, if higher, by owning such call option and depositing and segregating cash or liquid instruments equal in value to the difference between the two exercise prices. In addition, a Fund may cover its position by segregating cash or liquid instruments equal in value to the exercise price of the call option written by the Fund. When a Fund writes a put option, the Fund will segregate with its custodian bank cash or liquid instruments having a value equal to the exercise value of the option. The principal reason for a Fund to write call options on assets held by the Fund is to attempt to realize, through the receipt of premiums, a greater return than would be realized on the underlying assets alone.
its distribution requirements, and could affect the amount, timing or character of the income distributed to shareholders by the Fund. Investments by a Fund in a foreign subsidiary and shares of other investment companies could affect the amount, timing or character of the Fund’s distributions to shareholders relative to the Fund’s distributions had it invested directly in the securities held by such a foreign subsidiary or such other investment companies.
Each Fund may invest in a wide range of fixed income securities, which may include foreign sovereign, sub-sovereign and supranational bonds, as well as any other obligations of any rating or maturity such as foreign and domestic investment grade corporate debt securities and lower-rated corporate debt securities (commonly known as “junk bonds”). Lower-rated or high yield debt securities include corporate high yield debt securities, zero-coupon securities, payment-in-kind securities, and STRIPS. Investment grade corporate bonds are those rated BBB or better by Standard & Poor’s Rating Group (“S&P”) or Baa or better by Moody’s Investor Services (“Moody’s”). Securities rated BBB by S&P are considered investment grade, but Moody’s considers securities rated Baa to have speculative characteristics. See Appendix A for a description of corporate bond ratings. The Funds may also invest in unrated securities.
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.

  •   Developmental risk. Blockchain technology is not a product or service within an individually attributable revenue stream. Blockchain technology may never develop optimized transactional processes that lead to realized economic returns for any company in which the Fund invests. Blockchain Companies that are developing applications of blockchain technology applications may not in fact do so or may not be able to capitalize on those blockchain technologies. The development of new or competing platforms may cause consumers and investors to use alternatives to blockchains.
The investment restrictions of the Funds specifically identified as fundamental policies may not be changed without the affirmative vote of at least a majority of the outstanding voting securities of that Fund, as defined in the 1940 Act. The investment objectives and all other investment policies of the Funds not specified as fundamental (including the index of a Fund) may be changed by the Board without the approval of shareholders.
The SEC staff also has acknowledged that, while a board of trustees retains ultimate responsibility, trustees may delegate this function to an investment adviser. The Board of Trustees has delegated this responsibility for determining the liquidity of Rule 144A restricted securities that may be invested in by a Fund to the Advisor. It is not possible to predict with assurance exactly how the market for Rule 144A restricted securities or any other security will develop. A security that when purchased enjoyed a fair degree of marketability may subsequently become illiquid and, accordingly, a security that was deemed to be liquid at the time of acquisition may subsequently become illiquid. In such an event, appropriate remedies will be considered in order to minimize the effect on the Fund’s liquidity.
The existence of market makers (e.g., Virtu Financial) refutes a common assertion about futures—that there‘s always a loser for every winner, that it’s a zero-sum game. It’s true that derivatives like stock options and futures are created in matched pairs—a long and a short contract. If two speculators own those two contracts the profits on one side are offset by losses on the other but market makers are not speculators. In general, they’re not betting on the direction of the market. They act as intermediaries, selling to buyers at the higher ask price and buying from sellers at the lower bid price— collecting the difference.
Individual shares of the Fund will be listed for trading on [the Exchange] and can be bought and sold in the secondary market at market prices. The market price of shares will fluctuate in response to changes in the value of the Fund’s holdings, supply and demand for shares, and other market factors. ProShare Advisors cannot predict whether the Fund’s shares will trade above, below or at a price equal to the value of the Fund’s holdings. Differences between secondary market prices and NAV, the value of the Fund’s holdings, may be due largely to supply and demand forces in the secondary market, which may not be the same forces as those influencing prices for securities or financial instruments held by the Fund at a particular time. Given the fact that the Fund’s shares can be created and redeemed in Creation Units, ProShare Advisors believes that large discounts or premiums to the value of the Fund’s holdings should not be sustained.
The Board has appointed a chief compliance officer (“CCO”) for the Trust (who is also the Chief Compliance Officer for the Advisor). The CCO reports directly to the Board and participates in the Board’s meetings. The Independent Trustees meet at least annually in executive session with the CCO, and the Funds’ CCO prepares and presents an annual written compliance report to the Board. The CCO also provides updates to the Board on the operation of the Trust’s compliance policies and procedures and on how these procedures are designed to mitigate risk. Finally, the CCO and/or other officers or employees of the Advisor report to the Board in the event that any material risk issues arise.
And this is where the BRR comes in. The BRR is the reference rate that is relevant for futures contracts and options in Bitcoin. When a futures contract or call option expires on a certain day, the owner will receive the difference between the BRR and the Bitcoin price in the contract as cash (if the BRR is higher than the price in the contract, of course). The BRTI, in contrast, is a real-time statistic that is not binding for any contracts; it tells you for what price you can currently (in this second) buy or sell Bitcoin on the markets.

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.
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”).

The introduction of futures didn't lead to a wave of hedge-fund money shorting bitcoin. It led to retail and institutional money going long bitcoin. We talked last week about the spread between Cboe's bitcoin futures price and the actual price of bitcoin, which was wider than $1,000 for a while. The spread has tightened considerably -- as of 8:15 a.m. today, the CME futures traded at $18,585, Cboe futures at $18,670, and spot bitcoin at about $18,245, for a spread of about 2 percent -- but it still exists. Why would you pay more for a synthetic bitcoin in a month than you would for an actual bitcoin today? The answer, presumably, is that the synthetic bitcoin is more valuable to you: You want bitcoin exposure, but you'd prefer to get it through a standardized contract on a regulated exchange that settles in dollars. 
Coinbase is not alone in making moves toward becoming an ATS. Recently, mobile payment app company Circle acquired Poloniex, another U.S.-based exchange, with plans to “clean up” the exchange. A slide that was initially leaked from a Circle presentation stated, “Circle has briefed the SEC on the transaction and indicated that upon closing that we will begin the process of registering the new entity with the SEC and FINRA as a Broker/Dealer and in turn as a licensed ATS…”

Each Fund intends to use, on a regular basis, leveraged investment techniques in pursuing its investment objective. Leverage exists when a Fund achieves the right to a return on a capital base that exceeds the Fund’s assets. Utilization of leverage involves special risks and should be considered to be speculative. Specifically, leverage creates the potential for greater gains to Fund shareholders during favorable market conditions and the risk of magnified losses during adverse market conditions. Leverage is likely to cause higher volatility of the NAVs of these Funds’ Shares. Leverage may also involve the creation of a liability that does not entail any interest costs or the creation of a liability that requires the Fund to pay interest which would decrease the Fund’s total return to shareholders. If these Funds achieve their investment objectives, during adverse market conditions, shareholders should experience a loss greater than they would have incurred had these Funds not been leveraged.

Special Note Regarding the Correlation Risks of Geared Funds (All Funds, except the Matching ProShares Funds, the Managed Futures Strategy ETF, the Crude Oil Strategy ETF, the Bitcoin Futures Strategy ETF, the Short Bitcoin Futures Strategy ETF, the Blockchain/Bitcoin Strategy ETF, and the Bitcoin Futures/Equity Strategy ETF and the CDS Short North American HY Credit ETF)
Exchanges Operating in: US, Panama, Australia, Canada, Japan, Singapore, Hong Kong, New Zealand, China, Poland, EU, Indonesia, South Korea, UK, Russia, Seychelles, Mexico, Netherlands, Brazil, Japan, Philippines, Ukraine, Turkey, Iceland, British Virgin Islands, Thailand, Germany, Cyprus, Chile, Bulgaria, Czech Republic, India, Spain, Sweden, South Africa, Tanzania, France, Taiwan, Vietnam, Argentina, Venezuela, Malta, Pakistan, Switzerland, Austria
  •   A new competing digital asset may pose a challenge to bitcoin’s current market dominance, resulting in a reduction in demand for bitcoin, which could have a negative impact on the price of bitcoin. It is possible that other digital currencies and trading systems could become more widely accepted and used than Bitcoin. The rise of such currencies could lead to a reduction in demand for bitcoin, which could have a negative impact on the price of bitcoin.
In pure financial theory, the value of a futures contract is based on a "no arbitrage condition" from the interest rates in each asset. We have Bitcoin and US Dollar. Bitcoin interest rates tend to be less than US Dollar interest rates, so when you want to replicate the future value of bitcoin in US dollars, you have to borrow USD at, say, 5%, and invest in Bitcoin at 1% return. This requires a premium on the futures exchange to be able to hedge that trade. 
The longest redemption cycle for a Fund is a function of the longest redemption cycle among the countries whose stocks comprise the Funds. Under certain conditions, a Fund may pay redemption proceeds more than seven days after the tender of a Creation Unit for redemption, but generally a Fund will not take more than fourteen calendar days from the date of the tender to pay redemption proceeds.

Several factors may affect a Fund’s ability to achieve a high degree of correlation with its benchmark. Among these factors are: (i) a Fund’s fees and expenses, including brokerage (which may be increased by high portfolio turnover) and the costs associated with the use of derivatives; (ii) less than all of the securities underlying a Fund’s benchmark being held by the Fund and/or securities not included in its benchmark being held by a Fund; (iii) an imperfect correlation between the performance of instruments held by a Fund, such as futures contracts, and the performance of the underlying securities in a benchmark; (iv) bid-ask spreads (the effect of which may be increased by portfolio turnover); (v) holding instruments traded in a market that has become illiquid or disrupted; (vi) a Fund’s share prices being rounded to the nearest cent; (vii) changes to the benchmark that are not disseminated in advance; (viii) the need to conform a Fund’s portfolio holdings to comply with investment restrictions or policies or regulatory or tax law requirements;

The tables below show performance examples of an UltraPro and UltraPro Short ProShares Fund that have investment objectives to correspond to three times (3x) and three times the inverse (-3x) of, respectively, the daily performance of an index. In the charts below, areas shaded lighter represent those scenarios where a Fund will return the same as or outperform (i.e., return more than) the index performance times the stated multiple in the Fund’s investment objective; conversely, areas shaded darker represent those scenarios where the Fund will underperform (i.e., return less than) the index performance times the stated multiple in the Fund’s investment objective.
Slippage is when the actual price we execute at is different from what we expect. In this case, a perfect market would let us sell the bitcoin and settle the future at precisely the same time and price. But in practice, market imperfections and Bitcoin volatility could lead to the price moving between the two trades, wiping out profits or putting you in the red.
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.
It’s reasonable to assume that a product named a future is attempting to predict the future. For Bitcoin futures, this is definitely not what they deliver. The core utility of the futures markets is not predicting the future prices of their product but rather the secure delivery of a product at a known price, quality, and date. If there’s product seasonality (e.g., specific harvest times) or foreseeable shortages/abundances then future’s prices may reflect that but neither of these factors applies to Bitcoin.
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  •   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.
A dividend or Capital Gain Dividend with respect to shares of a Fund held by a tax-deferred or qualified plan, such as an IRA, retirement plan, or corporate pension or profit sharing plan, generally will not be taxable to the plan. Distributions from such plans will be taxable to individual participants under applicable tax rules without regard to the character of the income earned by the qualified plan. Shareholders should consult their tax advisors to determine the suitability of shares of a Fund as an investment through such plans and the precise effect of an investment on their particular situation.
Trading directly on CME is not possible unless you are a broker yourself. This means that you have to pay a high fee – between thousands and hundreds of thousands of USD – to join CME. As an individual investor, you need to find a broker who trades on CME. You will then open an account with this broker – a margin account rather than a cash account because in options trading, there is a margin involved, as we have seen above. Because this poses a higher risk for the broker – in case you can’t settle your debts – these deals can only be done in special margin accounts and not cash accounts.