•   Ownership of bitcoin is pseudonymous and the supply of accessible bitcoins is unknown. There is no registry showing which individuals or entities own bitcoin or the quantity of bitcoin that is owned by any particular person or entity. It is possible, that a small group of early bitcoin adopters hold a significant proportion of the bitcoin that has been thus far created. There are no regulations in place that would prevent a large holder of bitcoin from selling its bitcoins, which could depress the price of bitcoin and have an adverse effect on an investment in the Fund.
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.
Each Fund may enter into swap agreements to invest in a market without owning or taking physical custody of securities. On a typical long swap, the counterparty will generally agree to pay the Fund the amount, if any, by which the notional amount of the swap agreement would have increased in value had it been invested in the particular underlying assets (e.g., an ETF, or securities comprising a benchmark index), plus the dividends or interest that would have been received on those assets. The Fund will agree to pay to the counterparty a floating rate of interest on the notional amount of the swap agreement plus the amount, if any, by which the notional amount would have decreased in value had it been invested in such assets plus, in certain instances, commissions or trading spreads on the notional amount. Therefore, the return to the Fund on such swap agreements should be the gain or loss on the notional amount plus dividends or interest on the assets less the interest paid by the Fund on the notional amount. As a trading technique, the Advisor may substitute physical securities with a swap agreement having investment characteristics substantially similar to the underlying securities. Some Funds may also enter into swap agreements that provide the opposite return of their benchmark or a security. Their operations are similar to that of the swaps disclosed above except that the counterparty pays interest to each Fund on the notional amount outstanding and that dividends or interest on the underlying instruments reduce the value of the swap, plus, in certain instances, each Fund will agree to pay to the counterparty commissions or trading spreads on the notional amount. These amounts are often netted with any unrealized gain or loss to determine the value of the swap.
 	•	 	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.

If you want to do scalping, then shorter-term expiree contracts that settle really soon would be fine. Keep in mind, the normal state of futures markets is "contango", which means that longer dated contracts will have a premium to the current spot rate, to reflect the interest rate differential and time preference.  This means you will see Weeklies maybe with a $1-2 preium and Quarterlies (assuming they expire months from now) with a $5-8 premium.  As an example we have Quarterlies contracts right now at OKCoin that settle on December 25. So we're just starting December now, that means that even though these are "Quarterlies" contracts by classification, they are expiring not 3 months from now, but 1 month from now. Don't mix up the settlement expiration date with the naming convention. 
The CME Bitcoin futures contracts will be cash-settled, meaning that you will receive USD on the expiration date if your speculation was successful and you have not sold the derivative before the expiration date. You will not receive Bitcoin – that would be a physical settlement, even though Bitcoin is not a physical asset. This is a crucial difference because it enables traders to trade in Bitcoin futures without having a cryptocurrency wallet. Every transaction is done in USD.Thus, it is easy for mainstream traders to take part in this market.
The information in this Prospectus is not complete and may be changed. Shares of the Funds may not be sold until the registration statement filed with the Securities and Exchange Commission is effective. This Prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

The Advisor and its affiliated persons may come into possession from time to time of material nonpublic and other confidential information about companies which, if disclosed, might affect an investor’s decision to buy, sell, or hold a security. Under applicable law, the Advisor and its affiliated persons would be prohibited from improperly disclosing or using this information for their personal benefit or for the benefit of any person, regardless of whether the person is a client of the Advisor. Accordingly, should the Advisor or any affiliated person come into possession of material nonpublic or other confidential information with respect to any company, the Advisor and its affiliated persons will have no responsibility or liability for failing to disclose the information to clients as a result of following its policies and procedures designed to comply with applicable law. However, each Matching Fund is managed using what is commonly referred to as an index strategy in an attempt to simulate either the daily movement or a multiple, the inverse or an inverse multiple of the daily movement of its index, and the use of such index strategies may reduce conflicts of interest compared to funds using non-index investment strategies.


However, many of these investors are still waiting to be convinced to take the leap into crypto. One thing that is still giving many institutional investors pause is the fact that trade management systems in the crypto world simply do not offer the sophistication they are used to in conventional trading. They’ve become accustomed to the support of reliable automated tools, and the prospect of working without those can be a serious roadblock.


Cryptocurrencies allow traders to diversify their investment portfolio, as their price is mainly determined by demand and supply; Their value has a low correlation to national economies or political scenarios. Once Bitcoin surpassed the price of gold in 2017, US markets introduced 2 ETFs on Bitcoin and drew more and more institutional money into the world of cryptocurrencies. In 2017, Indian PM Narendra Modi has announced the gradual replacement of paper currency with electronic currency; In March 2018, the Marshall Islands announced that they would be introducing a cryptocurrency to replace US dollars as their main currency; other central banks are investigating the adoption of blockchain-like technologies… in short cryptocurrencies are probably here to stay. A growing number of crypto investors all over the world have already discovered the benefits:
Bitcoin futures are now available for trading on the Cboe Futures Exchange, LLC (CFE). CFE launched trading in Cboe bitcoin futures on December 10 under the ticker symbol "XBT" (contract specifications | fact sheet.) This brings many benefits to traders, including transparency, efficient price discovery, deep liquidity and centralized clearing. XBTSM futures provides a centralized marketplace for participants to trade based on their view of bitcoin prices, gain exposure to bitcoin prices or hedge their existing bitcoin positions.
The tables below shows performance examples of an Ultra and UltraShort ProShares Fund that have investment objective to correspond to two times (2x) and two times the inverse (-2x) 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 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.

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.
Investments in common units of MLPs involve risks that differ from investments in common stock. Holders of common units of MLPs have the rights typically provided to limited partners in limited partnerships and, thus, may have limited control and limited voting rights as compared to holders of a corporation’s common shares. Holders of common units may be subject to conflicts of interest with the MLP’s general partner, including those arising from incentive distribution payments. MLPs may also have limited financial resources and units may be subject to cash flow and dilution risk. In addition, investments held by MLPs may be relatively illiquid, limiting the MLPs’ ability to vary their portfolios promptly in response to changes in economic or other conditions. Accordingly, MLPs may be subject to more erratic price movements because of the underlying assets they hold. Further, a Fund’s investment in MLPs subjects the Fund to the risks associated with the specific industry or industries in which the MLPs invest.

or any other person or entity from the use of the MSCI Indexes or any data included therein in connection with the rights licensed hereunder or for any other use. Neither Morgan Stanley, any of its affiliates nor any other party involved in making or compiling the MSCI Indexes shall have any liability for any errors, omissions or interruptions of or in connection with the MSCI Indexes or any data included therein. Neither Morgan Stanley, any of its affiliates nor any other party involved in making or compiling the MSCI Indexes makes any express or implied warranties, and Morgan Stanley hereby expressly disclaims all warranties of merchantability or fitness for a particular purpose with respect to the MSCI Indexes or any data included therein. Without limiting any of the foregoing, in no event shall Morgan Stanley, any of its affiliates or any other party involved in making or compiling the MSCI Indexes have any liability for any direct, indirect, special, punitive, consequential or any other damages (including lost profits) even if notified of the possibility of such damages.

This can serve two purposes; firstly, CFDs are a regulated financial product which means the brokers who offer them should be licensed by a regulatory authority. The brokers we review are all regulated by reputable financial regulatory bodies, offering varying degrees of protection for your money – from ensuring it is held in a segregated bank account to participation in compensation schemes should the broker become insolvent. There are, of course, criminal CFD brokers operating outside the law so you should do your homework before depositing!
ProShare Advisors, located at 7501 Wisconsin Avenue, Suite 1000E, Bethesda, Maryland 20814, serves as the investment adviser to the fund and provides investment advice and management services to each Fund. ProShare Advisors oversees the investment and reinvestment of the assets in each Fund. Pursuant to the Investment Advisory and Management Agreement between ProShare Advisors and the Trust (entered into on behalf of each Fund), ProShare Advisors is responsible for substantially all expenses of the Fund, except interest expenses, taxes, brokerage and other transaction costs, compensation and expenses of the Independent Trustees, compensation and expenses of counsel to the Independent Trustees, compensation and expenses of the Trust’s chief compliance officer and his or her staff, future distribution fees or expenses, and extraordinary expenses. For its investment advisory and management services, ProShares Bitcoin Futures Strategy ETF pays ProShare Advisors a fee at an annualized rate of     % of average daily net assets of the Fund; ProShares Short Bitcoin Futures Strategy ETF pays ProShare Advisors a fee at an annualized rate of    % of average daily net assets of the Fund; ProShares Bitcoin Futures/Equity Strategy ETF pays ProShare Advisors a fee at an annualized rate of    % of average daily net assets of the Fund; and ProShares Bitcoin/Blockchain Strategy ETF pays ProShare Advisors a fee at an annualized rate of    % of average daily net assets of the Fund. A discussion regarding the basis for the Board approving the investment advisory and management agreement for each Fund will be included in the Trust’s semi-annual or annual report to shareholders that covers the period during which the approval occurred.

So be aware of the premium or discount that is on longer dated contracts, this can allow you some arbitrage opportunities if you are patient and have the coins to apply to it. In general, we recommend that you trade any contract that has good liquidity and high volume. This is the most important characteristic of ANY product for a trader. If you can't get in and out reliably, and have a price that reasonably follows the spot market behavior, then it's not worth trading.
For each intervening holiday in the applicable foreign market that is not a holiday observed by the U.S. equity markets, the redemption settlement cycle will be extended by the number of days of such intervening holiday. In addition to holidays, other unforeseeable closings in a foreign market, including due to regulatory action, may also prevent a Fund from delivering securities within the normal settlement period.
COVERED BONDS. The Funds may invest in covered bonds, which are debt securities issued by banks or other credit institutions that are backed by both the issuing institution and underlying pool of assets that compose the bond (a “cover pool”). The cover pool for a covered bond is typically composed of residential or commercial mortgage loans or loans to public sector institutions. A covered bond may lose value if the credit rating of the issuing bank or credit institution is downgraded or the quality of the assets in the cover pool deteriorates.
The Funds may invest in the securities of other investment companies, including exchange-traded funds (ETFs) and unit investment trusts (UITs), to the extent that such an investment would be consistent with the requirements of the 1940 Act or any exemptive order issued by the SEC. If a Fund invests in, and thus, is a shareholder of, another investment company, the Fund’s shareholders will indirectly bear the Fund’s proportionate share of the fees and expenses paid by such other investment company, including advisory fees, in addition to both the management fees payable directly by the Fund to the Fund’s own investment adviser and the other expenses that the Fund bears directly in connection with the Fund’s own operations.
This mega-powerful currency has not only opened the gate for other currencies, but also leads the cryptocurrency world with pride. It is governed to make sure no extra Bitcoin is produced, as a maximum quantity of 21 Million Bitcoin units was agreed to. When introduced, the rate was $1 to 1,309 BTC. The wheel has turned, and when Bitcoin reached the all-time high of $19,783.21 in 2017, it was certainly a meaningful milestone for Satoshi Nakamoto, the creator of Bitcoin.
Because of the wide range of types and maturities of corporate debt securities, as well as the range of creditworthiness of its issuers, corporate debt securities have widely varying potentials for return and risk profiles. For example, commercial paper issued by a large established domestic corporation that is rated investment-grade may have a modest return on principal, but carries relatively limited risk. On the other hand, a long-term corporate note issued by a small foreign corporation from an emerging market country that has not been rated may have the potential for relatively large returns on principal, but carries a relatively high degree of risk.
The Advisor, with the assistance of ISS, maintains for a period of at least five years a record of each proxy statement received and materials that were considered when the proxy was voted during the calendar year. Information on how the Funds voted proxies relating to portfolio securities for the 12-month (or shorter) period ended June 30 is available without charge, upon request, (1) by calling the Advisor at 888-776-3637, (2) on the Trust’s website at www.ProShares.com, and (3) on the SEC’s website at http://www.sec.gov.
The Administrator pays all fees and expenses that are directly related to the services provided by the Administrator to the Funds; each Fund reimburses the Administrator for all fees and expenses incurred by the Administrator which are not directly related to the services the Administrator provides to the Funds under the service agreement. Each Fund may also reimburse the Administrator for such out-of-pocket expenses as incurred by the Administrator in the performance of its duties. For these services each Fund that was operational for the period indicated paid the Administrator and Citi the amounts set forth below. Because the New Fund was not operational at the end of the Trust’s last fiscal year, information on fees paid to the Administrator and Citi on behalf of the New Fund is not included in this SAI.

The exceptions to withholding for Capital Gain Dividends and short-term capital gain dividends do not apply to (A) distributions to an individual foreign shareholder who is present in the United States for a period or periods aggregating 183 days or more during the year of the distribution and (B) distributions attributable to gain that is treated as effectively connected with the conduct by the foreign shareholder of a trade or business within the United States under special rules regarding the disposition of U.S. real property interests as described below. The exception to withholding for interest-related dividends does not apply to distributions to a foreign shareholder (A) that has not provided a satisfactory statement that the beneficial owner is not a U.S. person, (B) to the extent that the dividend is attributable to certain interest on an obligation if the foreign shareholder is the issuer or is a 10% shareholder of the issuer, (C) that is within certain foreign countries that have inadequate information exchange with the United States, or (D) to the extent the dividend is attributable to interest paid by a person that is a related person of the foreign shareholder and the foreign shareholder is a controlled foreign corporation. If a Fund invests in a RIC that pays Capital Gain Dividends, short-term capital gain dividends or interest-related dividends to the Fund, such distributions retain their character as not subject to withholding if properly reported when paid by the Fund to foreign shareholders. A Fund is permitted to report such part of its dividends as interest-related and/or short-term capital gain dividends as are eligible, but is not required to do so.
In the course of managing the Fund’s investments, ProShare Advisors will need to periodically adjust the Fund’s holdings in order to maintain investment exposure approximately equivalent to the Fund’s assets. This process entails obtaining additional inverse exposure as the Fund experiences gains, and reducing inverse exposure as the Fund experiences losses. The higher the volatility of the bitcoin futures contracts in which the Fund invests, the more such rebalancing can adversely affect the Fund’s performance.

and other factors. Thus, to the extent a Fund invests in swaps that use an ETF as the reference asset, that Fund may be subject to greater correlation risk and may not achieve as high a degree of correlation with its index as it would if the Fund used only swaps on the underlying index. The Advisor, under the supervision of the Board of Trustees, is responsible for determining and monitoring the liquidity of the Funds’ transactions in swap agreements.
R-1 (high) – Short term debt rated “R-1 (high)” is of the highest credit quality, and indicates an entity which possesses unquestioned ability to repay current liabilities as they fall due. Entities rated in this category normally maintain strong liquidity positions, conservative debt levels and profitability which is both stable and above average. Companies achieving an “R-1 (high)” rating are normally leaders in structurally sound industry segments with proven track records, sustainable positive future results and no substantial qualifying negative factors. Given the extremely tough definition which DBRS has established for an “R-1 (high)”, few entities are strong enough to achieve this rating.
  •   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.

Other countries are not as accommodative of bitcoin. For example, the Chinese government on December 3, 2013 issued a notice that classified bitcoin as legal and “virtual commodities;” however, the same notice restricted the banking and payment industries from using bitcoin, creating uncertainty and limiting the ability of Bitcoin Exchanges to operate in the then-second largest bitcoin market. Then on September 15, 2017, the Chinese government and local financial regulators officially requested some Chinese Bitcoin Exchanges and digital asset trading platforms to shut down by the end of September 2017. In addition, the Central Bank of Bolivia banned the use of bitcoin as a means of payment in May 2014. Further, in July 2016, the Russian Ministry of Finance indicated it supports a proposed law that bans bitcoin domestically but allows for its use as a foreign currency. In September 2017 the head of the Russian central bank stated that it is categorically against regulating cryptocurrencies as money, as a means by which payment can be made for goods and services, and against equating them with foreign currency. Most recently, South Korea’s Office for Government Policy Coordination released a wide variety of proposed regulations which range from the imposition of capital gains taxes on profits realized from cryptocurrency trading, to banning minors from registering on South Korean bitcoin exchanges, and even prohibiting financial institutions from investing in digital assets. These restrictive stances towards digital assets may reduce the rate of expansion of bitcoin use or even eliminate the use of bitcoin entirely in these geographies.


An Authorized Participant that wishes to place an order to purchase Creation Units outside the Clearing Process must state that it is not using the Clearing Process and that the purchase instead will be effected through a transfer of securities and cash directly through DTC or as described below for Global Funds (defined below). Purchases (and redemptions) of Creation Units of the Matching and Ultra ProShares Funds settled outside the Clearing Process will be subject to a higher Transaction Fee than those settled through the Clearing Process. Purchase orders effected outside the Clearing Process are likely to require transmittal by the Authorized Participant earlier on the transmittal date than orders effected using the Clearing Process. Those persons placing orders outside the Clearing Process should ascertain the deadlines applicable to DTC and the Federal Reserve Bank wire system by contacting the operations department of the broker or depository institution effectuating such transfer of Deposit Securities and Balancing Amount (for the Matching and Ultra ProShares Funds), each as applicable and at the discretion of the Advisor, or of the Cash Purchase Amount together with the applicable Transaction Fee.

The value of the bitcoin futures contracts is generally based on the expected value of bitcoin at a future point in time, specifically, the expiration date of the bitcoin futures contracts. Other factors, such as cost of mining, storing and securing bitcoin may affect the value of bitcoin futures. A change in the price of bitcoin today (sometimes referred to as the “spot” price) will not necessarily result in a corresponding movement in the price of the bitcoin futures contracts since the price of the bitcoin futures contracts is based on expectations of the price of bitcoin at a future point in time. Additionally, there is no one centralized source for pricing bitcoin and pricing from one bitcoin exchange to the next can vary widely. Therefore, the value of the bitcoin futures contracts held by the Fund should not be expected to track the price of bitcoin on the Bitcoin Exchange Market.

The value of the bitcoin futures contracts is generally based on the expected value of bitcoin at a future point in time, specifically, the expiration date of the bitcoin futures contracts. Other factors, such as cost of mining, storing and securing bitcoin may affect the value of bitcoin futures. A change in the price of bitcoin today (sometimes referred to as the “spot” price) will not necessarily result in a corresponding movement in the price of the bitcoin futures contracts since the price of the bitcoin futures contracts is based on expectations of the price of bitcoin at a future point in time. Additionally, there is no one centralized source for pricing bitcoin and pricing from one bitcoin exchange to the next can vary widely. Therefore, the value of the bitcoin futures contracts held by the Fund should not be expected to track the price of bitcoin on the Bitcoin Exchange Market.
The regulation of bitcoin, digital assets and related products and services continues to evolve. The inconsistent and sometimes conflicting regulatory landscape may make it more difficult for bitcoin businesses to provide services, which may impede the growth of the bitcoin economy and have an adverse effect on consumer adoption of bitcoin. There is a possibility of future regulatory change altering, perhaps to a material extent, the nature of an investment in the Funds or the ability of the Funds to continue to operate. Additionally, to the extent that bitcoin itself is determined to be a security, commodity future or other regulated asset, or to the extent that a United States or foreign government or quasi-governmental agency exerts regulatory authority over the Bitcoin Network, bitcoin trading or ownership in bitcoin, the price of bitcoin and the value of the Bitcoin Instruments may be adversely affected, which may have an adverse effect on the value of your investment in the Funds. In sum, bitcoin regulation takes many different forms and will, therefore, impact bitcoin and its usage in a variety of manners. The European Union has recently agreed to rules designed to reduce anonymity of bitcoin transactions, which may impact the supply and demand for bitcoin and bitcoin futures contracts.
•   ETN Risk — The Fund is likely to obtain substantial exposure to the price movements of bitcoin by holding ETNs that provide exposure to the price of bitcoin. ETNs are unsecured, unsubordinated debt securities of an issuer that are listed and traded on a U.S. stock exchange. An ETN’s returns are generally linked to the performance of a particular market benchmark or strategy minus applicable fees. ETNs do not provide principal protection and may or may not make periodic coupon payments. ETNs are subject to credit risk, which is the risk that the issuer cannot pay interest or repay principal when it is due. Additionally, the value of an ETN may be influenced by time to maturity, level of supply and demand, volatility and lack of liquidity in the underlying market (e.g., the commodities market), changes in interest rates or the issuer’s credit rating, and other economic, legal, political or geographic events. The value of an investment in an ETN may be impacted by fees associated with the ETN. Structural aspects of the ETNs may impact their market value. Trading by affiliates of an ETN sponsor may create conflicts of interest. The issuer of an ETN may be unable to meet its obligations. The potential impact of Bitcoin Network forks on the value of a bitcoin ETN is unclear. ETNs issued by special purpose vehicles may include greater risk. ETNs are subject to risks associated with the underlying asset.
Additions such as Zerocoin have been suggested, which would allow for true anonymity.[54][55][56] In recent years, anonymizing technologies like zero-knowledge proofs and ring signatures have been employed in the cryptocurrencies Zcash and Monero, respectively. Cryptocurrency anonymizing implementations such as Cloakcoin, Dash, and PIVX use built in mixing services, also known as tumblers.[57]

While volatile movements take away the attractiveness of any asset, a certain amount of swing in price creates trading opportunities. This is something that many traders and speculators have been taking advantage of by buying the digital currency and then selling at a profit through an exchange. The whole process makes bitcoin exchanges an important part of the ecosystem since it facilitates the buying and selling of bitcoins, as well as futures trading.

Under Treasury regulations, if a shareholder recognizes a loss on a disposition of a Fund’s Shares of $2 million or more for an individual shareholder or $10 million or more for a corporate shareholder (including, for example, an insurance company holding separate account), the shareholder must file with the IRS a disclosure statement on Form 8886. Direct shareholders of portfolio securities are in many cases excepted from this reporting requirement, but, under current guidance, shareholders of a RIC are not excepted. This filing requirement applies even though, as a practical matter, any such loss would not, for example, reduce the taxable income of an insurance company. Future guidance may extend the current exception from this reporting requirement to shareholders
of the calendar year, and (3) all such ordinary income and capital gains that were not distributed in previous years. For purposes of the required excise tax distribution, ordinary gains and losses from the sale, exchange, or other taxable disposition of property that would be properly taken into account after October 31 are generally treated as arising on January 1 of the following calendar year. Also, for these purposes, the Fund will be treated as having distributed any amount on which it is subject to corporate income tax for the taxable year ending within the calendar year. The Funds intend generally to make distributions sufficient to avoid imposition of the excise tax, although the Funds reserve the right to pay an excise tax rather than make an additional distribution when circumstances warrant (for example, the payment of the excise tax amount is deemed to be de minimis).
Currently, Bitcoin futures have very high margin requirements. The Cboe requires 40% of the notional amount for maintenance margin, the CME requires 43%. Your broker will likely require more than that. The culprit behind these high requirements is Bitcoin’s high volatility—until that calms down the exchanges will protect themselves by requiring a bunch of up-front money. If you don’t come up with the money for a margin call they want to close out your position without leaving a negative balance.
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