The Morningstar Alternatives Solution ETF pays ProShare Advisors a fee at an annualized rate based on its average daily net assets of 0.07%. ProShare Advisors has entered into an Advisory and Management Services Fee Waiver Agreement that waives this investment advisory fee for the Morningstar Alternatives Solution ETF through at least October 31, 2018. Prior to this date, ProShare Advisors may not terminate the arrangement without the approval of the Board.

The Funds may invest in equity securities. The market price of securities owned by a Fund may go up or down, sometimes rapidly or unpredictably. Securities may decline in value due to factors affecting securities markets generally or particular industries represented in the securities markets. The value of a security may decline due to general market conditions not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the general outlook for corporate earnings, changes in interest or currency rates, or adverse investor sentiment generally. A security’s value may also decline due to factors that affect a particular industry or industries, such as labor shortages or increased production costs and competitive conditions within an industry. The value of a security may also decline for a number of reasons that directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services. Equity securities generally have greater price volatility than fixed income securities, and the Funds are particularly sensitive to these market risks.
Some Centra investors have their doubts, and a plaintiffs' law firm has brought a class action complaint against Centra demanding the investors' money back. The complaint is fun -- Centra had a “Blog/Media Bounty” program to "Reward Experienced Writers who write quality Reviews, Articles About the Centra Project and the ICO crowdsale" -- but not that fun, because the plaintiffs' lawyers don't actually need to prove that Centra was a scam. Their job is much easier: All they need to do is prove that the tokens Centra sold in its initial coin offering were securities. If they were securities, they were sold illegally: They were offered publicly without being registered with the Securities and Exchange Commission, or being exempt from registration. And one remedy for the illegal sale of securities is that the buyers can demand their money back -- whether or not Centra is legitimate, whether or not it is actually using the money to build a cryptocurrency debit card, whether or not it made any misleading statements in the ICO.
Cryptocurrencies are a potential tool to evade economic sanctions for example against Russia, Iran, or Venezuela. In April 2018, Russian and Iranian economic representatives met to discuss how to bypass the global SWIFT system through decentralized blockchain technology.[72] Russia also secretly supported Venezuela with the creation of the petro (El Petro), a national cryptocurrency initiated by the Maduro government to obtain valuable oil revenues by circumventing US sanctions.[73]
Disctric0x is a network of decentralized communities and marketplaces, and where each ‘district’ is a decentralized entity on the district0x Network. In other words, District0x allows anyone to create a network of communities (or organizations) with a focus on governance, cooperation and decision making being decentralized. District0x is an open-source software project, and as such, it does not seek to gain profit, but rather focuses all of its attention towards building software that enables development and governance of marketplaces that are powered by the community.
The Guidelines are maintained and implemented by ISS and are an extensive list of common proxy voting issues with recommended voting actions based on the overall goal of achieving maximum shareholder value and protection of shareholder interests. Generally, proxies are voted in accordance with the voting recommendations contained in the Guidelines. If necessary, the Advisor will be consulted by ISS on non-routine issues. Proxy issues identified in the Guidelines include but are not limited to:
In a permanent-growth cryptocurrency market, CryptoLux is permanently re-inventing and improving itself with clients from over 23 countries and a sold-out Initial Coin Offering. Our state-of-art trading platform is aiming at bringing simplicity in a world of ambiguity and uncertainty, by teaching our clients how to simply trade and gain considerable profits out of their Crypto investments.
ensure the delivery of the requisite number of Fund Shares through DTC to the Custodian by no later than 10:00 a.m. Eastern Time of the second Business Day (T+2) immediately following the transmittal date. Authorized Participants should be aware that the deadline for such transfers of Fund Shares through the DTC system may be significantly earlier than the close of business on the primary listing exchange. Those making redemption requests should ascertain the deadline applicable to transfers of Fund Shares through the DTC system by contacting the operations department of the broker or depositary institution affecting the transfer of Fund Shares. The Balancing Amount, if any, must be transferred in U.S. dollars directly to the Custodian through the Federal Reserve Bank wire transfer system in a timely manner so as to be received by the Custodian no later than 2:00 p.m. Eastern Time on the second Business Day (T+2) immediately following the transmittal date. If the Custodian does not receive both the required Fund Shares and the Balancing Amount, if any, by 10:00 a.m. and 2:00 p.m., respectively, on the second Business Day (T+2) immediately following the transmittal date, such order will be deemed not in proper form and cancelled.
Source: MV Index Solutions GmbH (MVIS®). MVIS is a wholly owned subsidiary of Van Eck Associates Corporation. Data as of December 8, 2017 (synthesized data from BitMEX, OKCoin, CryptoFacilities, and BTCC which represents non-U.S. listed bitcoin futures trading on these exchanges). Not intended to be a forecast of future events, a guarantee of future results or investment advice. Current market conditions may not continue.  
Neither ProShares Trust nor ProShares Ultra 7-10 Year Treasury, ProShares Short 7-10 Year Treasury, ProShares UltraShort 7-10 Year Treasury, ProShares Ultra 20+ Year Treasury, ProShares Short 20+ Year Treasury, ProShares UltraShort 20+ Year Treasury, or ProShares UltraPro Short 20+ Year Treasury is sponsored, endorsed, sold or promoted by Interactive Data. Interactive Data makes no representations or warranties regarding ProShares Trust or, ProShares Ultra 7-10 Year Treasury, ProShares Short 7-10 Year Treasury, ProShares UltraShort 7-10 Year Treasury, ProShares Ultra 20+ Year Treasury, ProShares Short 20+ Year Treasury, ProShares UltraShort 20+ Year Treasury, or ProShares UltraPro Short 20+ Year Treasury or the ability of, ProShares Ultra 7-10 Year Treasury, ProShares Short 7-10 Year Treasury, ProShares UltraShort 7-10 Year Treasury, ProShares Ultra 20+ Year Treasury, ProShares Short 20+ Year Treasury, ProShares UltraShort 20+ Year Treasury, or ProShares UltraPro Short 20+ Year Treasury to track the applicable Index.

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.
The only way that new Bitcoin can be created is through a process called “mining.” Bitcoin mining occurs when users process transactional data into “blocks” and then add them to the blockchain. As payment for this service, miners are awarded specific amounts of new Bitcoin. Upon its launch, the maximum supply of Bitcoin was predetermined to be 21 million.
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 Code generally imposes a 3.8% Medicare contribution tax on the “net investment income” of certain individuals, trusts and estates to the extent their income exceeds certain threshold amounts. For these purposes, “net investment income” generally includes, among other things, (i) distributions paid by a Fund of ordinary dividends and capital gain dividends, and (ii) any net gain from the sale, redemption or exchange of Fund shares. Shareholders are advised to consult their tax advisors regarding the possible implications of this additional tax on their investment in a Fund.
There are two USA regulated Bitcoin futures exchanges in operation. The CME’s contract unit is five Bitcoins whereas the Cboe’s contract unit is one—that’s the biggest difference between these futures. The upfront money to buy or sell short a CME contract will be about five times higher than the Cboe contract. Larger investors won’t care but this will be an issue for smaller investors. Another difference is the spot/settlement process that the exchanges use. In the case of Cboe futures, the contracts will be settled to a 4 pm ET Gemini exchange auction price on the day of expiration, for the CME futures the settlement price is a complex calculation using an hour of volume weighted data from multiple exchanges (currently Bitstamp, itBit, Kraken, and GDAX). With the CME’s approach, it will be harder to manipulate the settlement price but it doesn’t give arbitrageurs a physical mechanism to trade their positions—possibly an issue.

Each of 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 (each, a “Parent Fund”) intends to achieve commodity exposure through investment in the ProShares Cayman Portfolio I, the ProShares Cayman Crude Oil Portfolio, the ProShares Cayman Bitcoin Futures Strategy Portfolio the ProShares Cayman Short Bitcoin Futures Strategy Portfolio, the ProShares Cayman Bitcoin Futures/Equity Strategy Portfolio and the ProShares Cayman Bitcoin/Blockchain Strategy Portfolio respectively, each a wholly-owned subsidiary of its respective Parent Fund (each, a “Subsidiary”) organized under the laws of the Cayman Islands. Each Parent Fund’s investment in its respective Subsidiary is intended to provide such Parent Fund with exposure to commodity and financial markets in accordance with applicable rules and regulations. Each Subsidiary may invest in derivatives, including futures, forwards, option and swap contracts, notes and other investments intended to serve as margin or collateral or otherwise support the Subsidiary’s derivatives positions. Neither Subsidiary is registered under the 1940 Act, and neither Subsidiary will have all of the protections offered to investors in RICs. The Board, however, has oversight responsibility for the investment activities of each Parent Fund, including its investment in its respective Subsidiary, and the Parent Fund’s role as the sole shareholder of the Subsidiary.

With BitVC and OKCoin you can hold simultaneous long and short positions on the same contract. In BitMEX you can not. Technically it makes no sense to hold opposite simultaneous positions because it just cancels each other out. You may as well just close the position instead. There are some who still prefer, for psychological reasons, to use this and wrongly call it a "hedge", but really you're better off saving the trading fees and just getting out of a position if your outlook on a trade has changed.
Investors in the ProShares Short Bitcoin Futures Strategy ETF should understand the consequences of the “short” strategy employed by the Fund, which is subject to, among others, compounding and market volatility risk. The Fund may adjust its short exposure as frequently as daily basis which entails obtaining additional short exposure as the Fund experiences gains, and reducing short exposure as the Fund experiences losses. As a result, the Fund’s performance may be more vulnerable to the effects of compounding than funds that do not seek to provide short investment exposure. During periods of high volatility, this risk may be exacerbated and the Fund may have losses as a result of such adjustments.


•   Market Price Variance Risk — Fund shares are 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 shares will trade above, below or at a price equal to the value of the Fund’s holdings. Given the fact that shares can be created and redeemed in Creation Units, as defined below, ProShare Advisors believes that large discounts or premiums to the value of the Fund’s holdings should not be sustained. 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 directly with the Fund. To the extent that exchange specialists, market makers, Authorized Participants, or other participants are unavailable or unable to trade the Fund’s shares and/or create or redeem Creation Units, trading spreads and the resulting premium or discount on the Fund’s shares may widen and the Fund’s shares may possibly be subject to trading halts and/or delisting.
Categorize your investments and look at the long picture. In the process of your research, you’ll eventually realize you’re coming across a few different categories of coins. For some of them, you believe they have good teams, great vision, amazing publicity and a track record for successful execution. Great! Put these into medium or long-term holds and let them marinate into a delicious tenderloin. When the price dips, don’t even consider panic selling because anything in your medium or long-term portfolio should remain untouched for a set amount of time. BNB is a good example of a coin Miles considers a long hold. Recently, it dipped 20% for a while, and within our community, we witnessed some sell-offs to preserve investments. A week later, it jumped up almost 3x for a period of time.

The block time is the average time it takes for the network to generate one extra block in the blockchain.[35] Some blockchains create a new block as frequently as every five seconds.[36] By the time of block completion, the included data becomes verifiable. This is practically when the money transaction takes place, so a shorter block time means faster transactions.[citation needed]
OmiseGO (OMG) is a public financial technology that’s based on Ethereum. The concept of OMG is to enable peer-to-peer value exchange and payment service in real time across not only decentralized currencies but fiat money as well. OmiseGO allows anyone on its network to process financial transactions (payrolls, B2B, remittances, payments, etc.) in a much more inexpensive and decentralized manner.
The Funds may invest in both sponsored and unsponsored depositary receipts. Certain depositary receipts, typically those designated as “unsponsored,” require the holders thereof to bear most of the costs of such facilities, while issuers of “sponsored” facilities normally pay more of the costs thereof. The depository of an unsponsored facility frequently is under no obligation to distribute shareholder communications received from the issuer of the deposited securities or to pass through the voting rights to facility holders with respect to the deposited securities, whereas the depository of a sponsored facility typically distributes shareholder communications and passes through the voting rights.
Don’t invest blindy. There are people in this world who would sell a blind person a pair of glasses if they could make money. Those same people play in the cryptocurrency markets and use every opportunity to exploit less-informed investors. They’ll tell you what to buy or claim certain coins will moon, just to increase the prices so they can exit. Due to the highly speculative nature of the cryptocurrency markets today, a good investor will always do his or her own research in order to take full responsibility for the potential investment outcome. Information coming from even the best investor is, at best, great information, but never a promise, so you can still get burned.
interest, taxes, dividends (including dividend expenses on securities sold short), litigation, indemnification, expenses associated with investment in other funds as permitted by the then current registration statement, and extraordinary expenses as determined under generally accepted accounting principles) to the extent total annual Fund operating expenses, as a percentage of average daily net assets, exceed 0.95% through September 30, 2018 (0.30% for the Inflation Expectations ETF, 0.60% for the Global Listed Private Equity ETF, 0.50% for the Short Term USD Emerging Markets Bond ETF and the CDS Short North American HY Credit ETF, and 0.75% for the Merger ETF each through September 30, 2018. ProShare Advisors, on behalf of the Morningstar Alternatives Solution ETF, has contractually agreed to waive investment advisory and management services fees and to reimburse other expenses (exclusive of transaction costs, interest, taxes, dividends (including dividend expenses on securities sold short), litigation, indemnification, expenses associated with investment in other funds as permitted by the then current registration statement, and extraordinary expenses as determined under generally accepted accounting principles but inclusive of acquired fund fees and expenses) to the extent total annual Fund operating expenses, as a percentage of average daily net assets, exceed 0.95% through September 30, 2018. After such date, the expense limitation may be terminated or revised by ProShare Advisors. Amounts waived or reimbursed in a particular contractual period may be recouped by ProShare Advisors within five years of the end of that contractual period, however, such recoupment will be limited to the lesser of any expense limitation in place at the time of recoupment or the expense limitation in place at the time of waiver or reimbursement.

fluctuations in the value of the foreign currency between the acquisition and disposition of the position also are treated as ordinary income or loss. In certain circumstances, a Fund may elect to treat foreign currency gain or loss attributable to a forward contract, a futures contract or an option as capital gain or loss. Furthermore, foreign currency gain or loss arising from certain types of section 1256 contracts is treated as capital gain or loss, although a Fund may elect to treat foreign currency gain or loss from such contracts as ordinary in character. These gains and losses, referred to under the Code as “section 988” gains or losses, increase or decrease the amount of a Fund’s investment company taxable income available (and required) to be distributed to its shareholders as ordinary income. If a Fund’s section 988 losses exceed other investment company taxable income during a taxable year, the Fund would not be able to make any ordinary dividend distributions, or distributions made before the losses were realized would be recharacterized as a return of capital to shareholders, rather than as ordinary dividends, thereby reducing each shareholder’s basis in his or her Fund Shares.
A Parent Fund’s investment in its Subsidiary will potentially have the effect of accelerating the Fund’s recognition of income and causing its income to be treated as ordinary income, regardless of the character of such subsidiary’s income. If a net loss is realized by a Subsidiary, such loss is generally not available to offset the income earned by a Parent Fund. In addition, the net losses incurred during a taxable year by a Subsidiary cannot be carried forward by such Subsidiary to offset gains realized by it in subsequent taxable years. The Parent Funds will not receive any credit in respect of any non-U.S. tax borne by a Subsidiary.
In general, a foreign corporation that is not engaged in and is not treated as engaged in a U.S. trade or business is nonetheless subject to tax at a flat rate of 30% (or lower tax treaty rate), generally payable through withholding, on the gross amount of certain U.S.-source income that is not effectively connected with a U.S. trade or business. There is presently no tax treaty in force between the United States and the jurisdiction in which any Subsidiary is (or would be) resident that would reduce this rate of withholding tax. Income subject to such a flat tax is of a fixed or determinable annual or periodic nature and includes dividends and interest income. Certain types of income are specifically exempted from the 30% tax and thus withholding is not required on payments of such income to a foreign corporation. The 30% tax generally does not apply to capital gains (whether long-term or short-term) or to interest paid to a foreign corporation on its deposits with U.S. banks. The 30% tax also does not apply to interest which qualifies as “portfolio interest.” Very generally, the term portfolio interest includes U.S.-source interest (including OID) on an obligation in registered form, and with respect to which the person, who would otherwise be required to deduct and withhold the 30% tax, received the required statement that the beneficial owner of the obligation is not a U.S. person within the meaning of the Code.
Bitcoin Gold (BTG) is the second fork from Bitcoin (i.e. the second version to stem from Bitcoin’s source code). It retains Bitcoin’s transaction history, meaning that if you owned Bitcoin before the fork, you now own the equal amount of Bitcoin Gold. This cryptocurrency aims to introduce an alternative mining algorithm that is less susceptible to ASIC-based optimization, therefore allowing users to earn more with their computer cycles.

A Fund will be a personal holding company for federal income tax purposes if 50% or more of the Fund’s shares are owned, at any time during the last half of the Fund’s taxable year, directly or indirectly by five or fewer individuals. For this purpose, the term “individual” includes pension trusts, private foundations and certain other tax-exempt trusts. If a Fund becomes a personal holding company, it may be subject to a tax of 20% on all its investment income and on any net short-term gains not distributed to shareholders on or before the fifteenth day of the third month following the close of the Fund’s taxable year. In addition, the Fund’s status as a personal holding company may limit the ability of the Fund to distribute dividends with respect to a taxable year in a manner qualifying for the dividends-paid deduction subsequent to the end of the taxable year and will prevent the Fund from using tax equalization, which may result in the Fund paying a fund-level income tax. Each Fund intends to distribute all of its income and gain in timely manner such that it will not be subject to an income tax or an otherwise applicable personal holding company tax, but there can be no assurance that a Fund will be successful in doing so each year.
An Authorized Participant who exchanges securities for Creation Units generally will recognize a gain or a loss. The gain or loss will be equal to the difference between the market value of the Creation Units at the time and the sum of the exchanger’s aggregate basis in the securities surrendered plus the amount of cash paid for such Creation Units. An Authorized Participant who redeems Creation Units will generally recognize a gain or loss equal to the difference between the exchanger’s basis in the Creation Units and the sum of the aggregate market value of any securities received plus the amount of any cash received for such Creation Units. The IRS, however, may assert that a loss realized upon an exchange of securities for Creation Units cannot be deducted currently under the rules governing “wash sales,” or on the basis that there has been no significant change in economic position. Persons purchasing or redeeming Creation Units should consult their own tax advisors with respect to the tax treatment of any creation or redemption transaction.
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.
The validity of each cryptocurrency's coins is provided by a blockchain. A blockchain is a continuously growing list of records, called blocks, which are linked and secured using cryptography.[28][31] Each block typically contains a hash pointer as a link to a previous block,[31] a timestamp and transaction data.[32] By design, blockchains are inherently resistant to modification of the data. It is "an open, distributed ledger that can record transactions between two parties efficiently and in a verifiable and permanent way".[33] For use as a distributed ledger, a blockchain is typically managed by a peer-to-peer network collectively adhering to a protocol for validating new blocks. Once recorded, the data in any given block cannot be altered retroactively without the alteration of all subsequent blocks, which requires collusion of the network majority.
For Caspian, creating a crypto trading system that meets the needs of institutional investors is a benefit not only to those traders, but to the entire crypto ecosystem. Providing the infrastructure that institutions need to confidently enter the crypto world sets the stage for a much larger market. This brings needed volume, scale, stability and liquidity — not to mention the kind of credibility that can encourage even more players. In the end, we believe that building an effective trading solution will raise all boats to help crypto live up to its vast potential.
An Authorized Participant may place an order to redeem Creation Units (i) through the Clearing Process, or (ii) outside the Clearing Process. In either case, a redemption order for a Fund must be received by the following cut-off times (which may be earlier if the relevant Exchange or any relevant bond market closes early). In all cases purchase/redeem procedures are at this discretion of the Advisor and may be changed without notice.
He told me that, although he has little to do with Renaissance’s day-to-day activities, he occasionally offers ideas. He said, “I gave them one three months ago”—a suggestion for simplifying the historical data behind one of the firm’s trading algorithms. Beyond saying that it didn’t work, he wouldn’t discuss the details—Renaissance’s methods are proprietary and secret—but he did share with me the key to his investing success: he “never overrode the model.” Once he settled on what should happen, he held tight until it did.
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
Two members of the Silk Road Task Force—a multi-agency federal task force that carried out the U.S. investigation of Silk Road—seized bitcoins for their own use in the course of the investigation.[86] DEA agent Carl Mark Force IV, who attempted to extort Silk Road founder Ross Ulbricht ("Dread Pirate Roberts"), pleaded guilty to money laundering, obstruction of justice, and extortion under color of official right, and was sentenced to 6.5 years in federal prison.[86] U.S. Secret Service agent Shaun Bridges pleaded guilty to crimes relating to his diversion of $800,000 worth of bitcoins to his personal account during the investigation, and also separately pleaded guilty to money laundering in connection with another cryptocurrency theft; he was sentenced to nearly eight years in federal prison.[87]

When a market price is not readily available, each Fund’s investments are valued at fair value in good faith under procedures established by, and under the general supervision and responsibility of, the Board. The use of a fair valuation method may be appropriate if, for example: (i) market quotations do not accurately reflect fair value of an investment; (ii) an investment’s value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded; (iii) a trading halt closes an exchange or market early; or (iv) other events result in an exchange or market delaying its normal close. This procedure incurs the unavoidable risk that the valuation may be higher or lower than the securities might actually command if the Funds sold them. See the SAI for more details.
As of February 2018, the Chinese Government halted trading of virtual currency, banned initial coin offerings and shut down mining. Some Chinese miners have since relocated to Canada.[43] One company is operating data centers for mining operations at Canadian oil and gas field sites, due to low gas prices.[44] In June 2018, Hydro Quebec proposed to the provincial government to allocate 500 MW to crypto companies for mining.[45] According to a February 2018 report from Fortune,[46] Iceland has become a haven for cryptocurrency miners in part because of its cheap electricity. Prices are contained because nearly all of the country’s energy comes from renewable sources, prompting more mining companies to consider opening operations in Iceland. The region’s energy company says bitcoin mining is becoming so popular that the country will likely use more electricity to mine coins than power homes in 2018. In October 2018 Russia will become home to one of the largest legal mining operations in the world, located in Siberia. More than 1.5 million Russians are engaged in home mining. Russia’s energy resources and climate provide some of the best conditions for crypto mining.[47]
In order to make sure that you actually have money in your margin account to settle the difference with Mortimer every day, you are required to put up an initial margin at the beginning of the contract. A lower sum, the so-called minimum margin or maintenance margin, is also defined by the broker. If the money in your margin account falls from the initial margin to the maintenance margin, it triggers a margin call: The broker requests you to fill up your margin account to at least the initial margin (of course, you may also put up more).