•   Investments by a Fund in options, futures, forward contracts, swap agreements and other derivative financial instruments are subject to numerous special and complex tax rules. These rules could affect the amount, timing or character of the distributions to shareholders by a Fund. In addition, because the application of these rules may be uncertain under current law, an adverse determination or future Internal Revenue Service guidance with respect to these rules may affect whether a Fund has made sufficient distributions, and otherwise satisfied the relevant requirements, to maintain its qualification as a regulated investment company and avoid fund-level tax.
Mathematically, to regain a 50% loss you need the price to rise 100% (double) so don’t let yourself get there. Psychologically, you force yourself to trade to make up for the losses, and under pressure, you won’t make the best decisions. Cut losses early and re-evaluate your reasons for the trade, go back in later on, at a lower price if needed. Don’t take profits early, wait for a drop – this is a good enough place to close the trade

Update 1st October 2018: The cryptocurrency market has been volatile as ever over the last 6 months. Unless you are a skilled trader, it is harder to make money in a bear market than in a bull market – and we have been in a bear market for some time now. Personally, I have stopped trading and I am now focussing on growing my portfolio passively using a cryptocurrency trading bot – you can find out more about this here.  If you are new to crypto, read on!
In addition, there may be times when the market price and the value of the Fund’s holdings vary significantly and you may pay more than the value of the Fund’s holdings when buying the Fund’s shares on the secondary market, and you may receive less than the value of the Fund’s holdings when you sell those shares. While the creation/ redemption feature is designed to make it likely that shares normally will trade close to the value of the Fund’s holdings, disruptions to creations and redemptions may result in trading prices that differ significantly from the value of the Fund’s holdings. The market price of shares, like the price of any exchange-traded security, includes a “bid-ask spread” charged by the exchange specialist, market makers or other participants that trade the particular security. In times of severe market disruption, the bid-ask spread often increases significantly. This means that shares may trade at a discount to the value of the Fund’s holdings, and the discount is likely to be greatest when the price of shares is falling fastest, which may be the time that you most want to sell your shares. The Fund’s investment results are measured based upon the daily NAV of the Fund. Investors purchasing and selling shares in the secondary market may not experience investment results consistent with those experienced by Authorized Participants creating and redeeming shares directly with the Fund.
You could imagine the spread going the other way, though. If everyone really was clamoring to short bitcoin, and if the futures offered a more convenient way to do it than the bitcoin exchanges, then you'd expect the short sellers to pay a premium to short via futures. Instead of selling a bitcoin at $18,000 today, they'd be willing to sell a synthetic bitcoin for $17,500, paying the spread to an arbitrageur who was willing to do the actual shorting for them. But the fact that the spread is mostly positive, and that bitcoin's price has been mostly going up, suggests that the demand has mostly been for synthetic long positions, not short.
Distributions of Shares shall be made to DTC or its nominee, Cede & Co., as the registered holder of all Shares. DTC or its nominee, upon receipt of any such distributions, shall credit immediately DTC Participants’ accounts with payments in amounts proportionate to their respective beneficial interests in Shares as shown on the records of DTC or its nominee. Payments by DTC Participants to Indirect Participants and Beneficial owners of Shares held through such DTC Participants will be governed by standing instructions and customary practices, as is now the case with securities held for the accounts of customers in bearer form or registered in a “street name,” and will be the responsibility of such DTC Participants. The Trust has no responsibility or liability for any aspects of the records relating to or notices to Beneficial owners, or payments made on account of beneficial ownership interests in such Shares, or for maintaining, supervising or reviewing any records relating to such beneficial ownership interests or for any other aspect of the relationship between DTC and the DTC Participants or the relationship between such DTC Participants and the Indirect Participants and Beneficial owners owning through such DTC Participants.

A futures contract is a technique to hedge positions and reduce the risk of the unknown. It is also used for arbitrating between current spot and future contracts. In the case of bitcoins, futures have been more associated with miners who face the risk of unknown future prices. OrderBook.net (formerly iCBIT), a futures marketplace operating since 2011, sells millions of futures contracts each month. The standard contract size (or tick size) is $10. A typical instrument would look like this: BTC/USD-3.14. Here "BTC/USD" signifies the rate of exchange between Bitcoin and US dollar, "3" means the month of March, and "14" signifies the year 2014. The trading symbol for the same instrument will be BUH4. Each month has a trading symbol like March is H (as per Chicago Mercantile Exchange), the "B" is taken from BTC and the "U" from USD, and "4" signifies the year.
The Funds are exchange-traded funds (“ETFs”) and the shares of each Fund (“Shares”) are listed on NYSE Arca, The NASDAQ Stock Market or the Bats BZX Exchange, Inc., (each, an “Exchange”). The Shares trade on the relevant Exchange at market prices that may differ to some degree from the Shares’ NAVs. Each Fund issues and redeems Shares on a continuous basis at NAV in large, specified numbers of Shares called “Creation Units.” Creation Units of the Funds are issued and redeemed in-kind for securities and an amount of cash or entirely in cash, in each case at the discretion of ProShare Advisors LLC (the “Advisor” or “ProShare Advisors”). Except when aggregated in Creation Units, Shares cannot be purchased from and are not redeemable securities of the Funds. Retail investors, therefore, generally will not be able to purchase or redeem the Shares directly. Rather, most retail investors will purchase and sell Shares in the secondary market with the assistance of a broker. Reference is made to the Prospectus for a discussion of the investment objectives and policies of each of the Funds. The discussion below supplements, and should be read in conjunction with, the Prospectus. Portfolio management is provided to the Funds by ProShare Advisors, a Maryland limited liability company with offices at 7501 Wisconsin Avenue, Suite 1000E, Bethesda, MD 20814.
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.
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.
If the Fund holds the foregoing kinds of securities, it may be required to pay out as an income distribution each year an amount which is greater than the total amount of cash interest the Fund actually received. Such distributions may be made from the cash assets of the Fund or, if necessary, by disposition of portfolio securities including at a time when it may not be advantageous to do so. These dispositions may cause the Fund to realize higher amounts of short-term capital gains (generally taxed to shareholders at ordinary income tax rates) and, in the event the Fund realizes net capital gains from such transactions, its shareholders may receive a larger Capital Gain Dividend than if the Fund had not held such securities.
•   Tax Risk — In order to qualify for the special tax treatment accorded a regulated investment company (“RIC”) and its shareholders, the Fund must derive at least 90% of its gross income for each taxable year from “qualifying income,” meet certain asset diversification tests at the end of each taxable quarter, and meet annual distribution requirements. The Fund’s pursuit of its investment strategies will potentially be limited by the Fund’s intention to qualify for such treatment and could adversely affect the Fund’s ability to so qualify. The Fund can make certain investments, the treatment of which for these purposes is unclear. If, in any year, the Fund were to fail to qualify for the special tax treatment accorded a RIC and its

S&P 500 Dividend Aristocrats ETF; S&P MidCap 400 Dividend Aristocrats ETF; Russell 2000 Dividend Growers ETF; Equities for Rising Rates ETF; Morningstar Alternatives Solution ETF; S&P 500 Ex-Energy ETF; S&P 500 Ex-Financials ETF; S&P 500 Ex-Health Care ETF; and S&P 500 Ex-Technology ETF    4:00 p.m. (3:30 p.m. if in cash) in order to receive that day’s closing NAV per Share

The Fund generally does not expect to invest directly in futures contracts, option contracts and swap agreements (“Bitcoin Instruments”). The Fund expects to gain exposure to these investments by investing a portion of its assets in the ProShares Cayman Bitcoin Futures/Equity Strategy Portfolio, a wholly-owned subsidiary of the Fund organized under the laws of the Cayman Islands (the “Subsidiary”). The Subsidiary is advised by ProShare Advisors, the Fund’s investment advisor, and invests directly in Bitcoin Instruments. Unlike the Fund, the Subsidiary is not an investment company registered under the 1940 Act. The Fund’s investment in the Subsidiary is intended to provide the Fund with exposure to commodity markets related to bitcoin in accordance with applicable rules and regulations. The Fund will invest up to 25% of its total assets in the Subsidiary. Except as otherwise noted, references to the Fund’s investment strategies and risks include the investment strategies and risks of the Subsidiary.
That includes institutional investors, who are increasingly interested in the benefits that crypto could offer their portfolios — to a degree that might have been unthinkable even six months ago. These investors, who have $130 trillion of assets under management worldwide, could have a huge impact on the crypto market, whose market cap remains under $300 billion.
application of the PFIC rules, certain excess distributions might have been classified as capital gains. In general, under the PFIC rules, an excess distribution is treated as having been realized ratably over the period during which the Fund held the PFIC shares. If a Fund receives an excess distribution with respect to PFIC stock, the Fund will itself be subject to tax on the portion of an excess distribution that is allocated to prior taxable years without the ability to reduce such tax by making distributions to Fund shareholders, and an interest factor will be added to the tax as if the tax had been payable in such prior taxable years.
The Funds may invest in foreign issuers, securities traded principally in securities markets outside the United States, U.S.-traded securities of foreign issuers and/or securities denominated in foreign currencies (together “foreign securities”). Also, each Fund may seek exposure to foreign securities by investing in Depositary Receipts (discussed below). Foreign securities may involve special risks due to foreign economic, political and legal developments, including unfavorable changes in currency exchange rates, exchange control regulation (including currency blockage), expropriation or nationalization of assets, confiscatory taxation, taxation of income earned in foreign nations, withholding of portions of interest and dividends in certain countries and the possible difficulty of obtaining and enforcing judgments against foreign entities. Default in foreign government securities, political or social instability or diplomatic developments could affect investments in securities of issuers in foreign nations. In addition, in many countries there is less publicly available information about issuers than is available in reports about issuers in the United States. Foreign companies are not generally subject to uniform accounting, auditing and financial reporting standards, and auditing practices and requirements may differ from those applicable to U.S. companies. Further, the growing interconnectivity of global economies and financial markets has increased the possibilities that conditions in any one country or region could have an adverse impact on issuers of securities in a different country or region.
If a Fund purchases in the secondary market a debt security that has a fixed maturity date of more than one year from its date of issuance at a price lower than the stated redemption price of such debt security (or, in the case of a debt security issued with “original issue discount” (described below), a price below the debt security’s “revised issue price”), the excess of the stated redemption price over the purchase price is “market discount.” If the amount of market discount is more than a de minimis amount, a portion of such market discount must be included as ordinary income (not capital gain) by a Fund in each taxable year in which the Fund owns an interest in such debt security and receives a principal payment on it. In particular, the Fund will be required to allocate that principal payment first to the portion of the market discount on the debt security that has accrued but has not previously been includable in income. In general, the amount of market discount that must be included for each period is equal to the lesser of (i) the amount of market discount accruing during such period (plus any accrued market discount for prior periods not previously taken into account) or (ii) the amount of the principal payment with respect to such period. Generally, market discount accrues on a daily basis for each day the debt security is held by a Fund at a constant rate over the time remaining to the debt security’s maturity or, at the election of the Fund, at a constant yield to maturity which takes into account the semi-annual compounding of interest. Gain realized on the disposition of a market discount obligation must be recognized as ordinary interest income (not capital gain) to the extent of the accrued market discount.
Altcoins is the general term associated with the cryptocurrencies launched after Bitcoin’s success. At first, these were mere copies mimicking the original Bitcoin. Today, there are over 1,000 of these, and the list just keeps growing. Most crypto coins are launched following an ICO (Initial Coin Offering – a form of crowdfunding) in which the developers raise cash by offering a limited number of initial coins to finance technological development. So far, besides the list below, we can find names, such as Namecoin, Peercoin, Bytecoin, Deutsche eMark, Novacoin, Cryptogenic Bullion, Quark, DarkCoin and Mangocoinz (for smartphones).
Bitcoin is maintained on the decentralized, open source protocol of the peer-to-peer bitcoin computer network (the “Bitcoin Network”). No single entity owns or operates the Bitcoin Network. The infrastructure of the Bitcoin Network is collectively maintained by a decentralized user base. The Bitcoin Network is accessed through software, and software governs bitcoin’s creation, movement, and ownership. The value of bitcoin is determined in great part by the supply of (which is limited), and demand for, bitcoin in the global exchange markets for the trading of bitcoin (individually, “Bitcoin Exchanges” and collectively, the “Bitcoin Exchange Market”), market expectations for the adoption of bitcoin and the volume of private user-to-user transactions.
A futures contract is a technique to hedge positions and reduce the risk of the unknown. It is also used for arbitrating between current spot and future contracts. In the case of bitcoins, futures have been more associated with miners who face the risk of unknown future prices. OrderBook.net (formerly iCBIT), a futures marketplace operating since 2011, sells millions of futures contracts each month. The standard contract size (or tick size) is $10. A typical instrument would look like this: BTC/USD-3.14. Here "BTC/USD" signifies the rate of exchange between Bitcoin and US dollar, "3" means the month of March, and "14" signifies the year 2014. The trading symbol for the same instrument will be BUH4. Each month has a trading symbol like March is H (as per Chicago Mercantile Exchange), the "B" is taken from BTC and the "U" from USD, and "4" signifies the year.
•   Foreign Investments Risk — Investing in securities of foreign issuers may provide the Fund with increased risk. Various factors related to foreign investments may negatively impact the Fund’s performance, such as: i) fluctuations in the value of the applicable foreign currency; ii) differences in securities settlement practices; iii) uncertainty associated with evidence of ownership of investments in countries that lack centralized custodial services; iv) possible regulation of, or other limitations on, investments by U.S. investors in foreign investments; v) potentially higher brokerage commissions; vi) the possibility that a foreign government may withhold portions of interest and dividends at the source; vii) taxation of income earned in foreign countries or other foreign taxes imposed; viii) foreign exchange controls, which may include suspension of the ability to transfer currency from a foreign country; ix) less publicly available information about foreign issuers; x) changes in the denomination currency of a foreign investment; and xi) less certain legal systems in which the Fund might encounter difficulties or be unable to pursue legal remedies. Foreign investments also may be more susceptible to political, social, economic and regional factors than might be the case with U.S. securities. In addition, markets for foreign investments are usually less liquid, more volatile and significantly smaller than markets for U.S. securities, which may affect, among other things, the Fund’s ability to purchase or sell foreign investments at appropriate times. Because of differences in settlement times and/or foreign market holidays, transactions in a foreign market may take place one or more days after the necessary exposure to these investments is determined. Until the transactions are effected, the Fund is exposed to increased foreign currency risk and market risk.
Mass adoption of bitcoin will also require an accommodating regulatory environment. A lack of expansion in usage of bitcoin and the Bitcoin Blockchain could adversely affect the market for bitcoin and may have a negative impact on the performance of the Bitcoin Instruments and the performance of the Funds. Even if growth in bitcoin adoption continues in the near or medium-term, there is no assurance that bitcoin usage, or the market for Bitcoin Instruments, will continue to grow over the long-term. A contraction in use of bitcoin may result in increased volatility or a reduction in the price of bitcoin, as well as increased volatility or a reduction in the price of Bitcoin Derivatives, which could adversely impact the value of an investment in a Fund. Conversely, a rapid expansion in the use of bitcoin may result in rapid appreciation in the price of bitcoin, which could adversely impact the value of a Fund which takes a short position in bitcoin futures contracts.

Look, you and I are sophisticated, and we get that "bitcoin's price increase is deflationary and makes it a bad currency" is not a good argument against bitcoin, because "bitcoin is a bad currency" is not a good argument against bitcoin. (People keep making it though.) Bitcoin's value proposition -- much like that of gold -- is that it is an uncorrelated store of value, not that it is useful for buying a sandwich. But at the same time you have to watch out for business models that are based on the casual assumption that bitcoin works just like a currency. "Cryptocurrency-financed warehouse lending" has the word "cryptocurrency" in it, so it's worth billions of dollars, but I'm not sure it works as a business model.

An increase in cryptocurrency mining increased the demand of graphics cards (GPU) in 2017.[49] Popular favorites of cryptocurrency miners such as Nvidia’s GTX 1060 and GTX 1070 graphics cards, as well as AMD’s RX 570 and RX 580 GPUs, doubled or tripled in price – or were out of stock.[50] A GTX 1070 Ti which was released at a price of $450 sold for as much as $1100. Another popular card GTX 1060's 6 GB model was released at an MSRP of $250, sold for almost $500. RX 570 and RX 580 cards from AMD were out of stock for almost a year. Miners regularly buy up the entire stock of new GPU's as soon as they are available.[51]
general obligations of the issuer and are typically guaranteed by such issuer. Despite this guarantee, such debt securities are subject to default, restructuring or changes to the terms of the debt to the detriment of security holders. Such an event impacting a security held by a Fund would likely have an adverse impact on the Fund’s returns. Also, due to demand from other investors, certain types of these debt securities may be less accessible to the capital markets and may be difficult for a Fund to source. This may cause a Fund, at times, to pay a premium to obtain such securities for its own portfolio. For more information related to foreign sovereign, sub-sovereign and supranational securities, see “Foreign Securities” and “Exposure to Securities or Issuers in Specific Foreign Countries or Regions” above.
Having said that, bitcoin price action remains fraught with wild and inexplicable gaps, like a $400 drop and rise in an hour in the late hours of July 30, according to Bloomberg.  This particular trade, and unwind seems to have affected bitcoin pricing globally and likely impacted trading of the U.S. listed contracts as well.  Volumes and open interest seemed to have increased around the time of this large trade unwind.  It could be a coincidence, though I suspect that some smart traders, aware of the situation, put short trades on in these future contracts to take advantage of the forced unwind.
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.
Securities (including short-term securities) and other assets are generally valued at their market value using information provided by a pricing service or market quotations. Short-term securities are valued on the basis of amortized cost or based on market prices. Futures contracts and options on securities, indexes and futures contracts are generally valued at their last sale price prior to the time at which the NAV per share of a class of shares of a Fund is determined. Alternatively, fair valuation procedures as described below may be applied if deemed more appropriate. Routine valuation of certain other derivatives is performed using procedures approved by the Board of Trustees.
Fixed margin will isolate your margin to the individual position you have made in an instrument. So if you have 1 bitcoin in your account and you put 0.2btc margin for a Weeklies Futures long position, and it gets margin-called, you still have the 0.8btc left. However, if you're on cross-margin, also known as portfolio value margin, then your whole balance on the site is going to be used to back all your positions, and if you get margincalled, it's because you have run out of money on your whole account.
Since a portion of the Fund’s assets are invested in short positions in bitcoin futures contracts, the Fund will likely decline in value when the price of bitcoin futures contracts goes up (unless such losses are offset by gains in the value of the Fund’s positions in other investments), a result that is the opposite from the results of taking long positions in bitcoin futures contracts.
In contrast, if you are “going short” on Bitcoin, you assume that Bitcoin prices will fall. Buying put options will enable you to sell Bitcoin at some point in the future at a price that is higher than the future price you expect. In analogy to the example above, if the current Bitcoin price is 5,000 USD and you expect it to fall to 2,000 USD in 6 months, then put options allowing you to sell Bitcoin for 5,000 USD in 5 months (when everyone else is selling for 2000 USD) are very valuable.