In May 2018 Bitcoin Gold (and two other cryptocurrencies) were hit by a successful 51% hashing attack by an unknown actor, in which exchanges lost estimated $18m.[90] In June 2018, Korean exchange Coinrail was hacked, losing US$37 million worth of altcoin. Fear surrounding the hack was blamed for a $42 billion cryptocurrency market selloff.[91] On 9 July 2018 the exchange Bancor had $23.5 million in cryptocurrency stolen.[92]
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.
These days, all of the BTC/USD contracts trading at active futures markets are inverse, as mentioned in the beginning of this guide. The only differences between the exchanges is how they trigger liquidations and the procedure for handling margin calls. They all use Bitcoin as the currency, of course, and you can use the table below for a basic feature comparison:
  •   A decline in the adoption of bitcoin could have a negative effect on the price of bitcoin and bitcoin-related investments. Bitcoin’s adoption has been on a generally continuous climb since bitcoin first gained mass media attention in 2013. However, there can be no guarantees this growth will continue. Further, adoption of bitcoin as a means of payment has been limited when compared with the increase in the price of bitcoin, indicating that the majority of bitcoin’s use is for investment and speculative purposes. A lack of acceptance of bitcoin as a means of payment could negatively impact the price of the Bitcoin Futures contracts in which the Fund invests.
For purchases and sales of derivatives (i.e., financial instruments whose value is derived from the value of an underlying asset, interest rate or index) the Advisor evaluates counterparties on the following factors: reputation and financial strength; execution prices; commission costs; ability to handle complex orders; ability to give prompt and full execution, including the ability to handle difficult trades; accuracy of reports and confirmations provided; reliability, type and quality of research provided; financing costs and other associated costs related to the transaction; and whether the total cost or proceeds in each transaction is the most favorable under the circumstances.
The Distribution and Service Plan and Distribution and Service Agreements will remain in effect for a period of one year and will continue in effect thereafter only if such continuance is specifically approved annually by a vote of the Trustees. All material amendments of the Distribution and Service Plan must also be approved by the Board. The Distribution and Service Plan may be terminated at any time by a majority of the Board or by a vote of a majority of the outstanding Shares, as defined under the 1940 Act, of the affected Fund. The Distribution and Service Agreements may be terminated at any time, without payment of any penalty, by vote of a majority of the Independent Trustees or by a vote of a majority of the outstanding Shares, as defined under the 1940 Act, of the affected Fund on not less than 60 days’ written notice to any other party to the Distribution and Service Agreements. The Distribution and Service Agreements shall terminate automatically if assigned. The Board has determined that, in its judgment, there is a reasonable likelihood that the Distribution and Service Plan will benefit the Funds and holders of Shares of the Funds. In the Board’s quarterly review of the Distribution and Service Plan and Distribution and Service Agreements, the Trustees will consider their continued appropriateness and the level of compensation and/or reimbursement provided therein.

The Board has established an Audit Committee to assist the Board in performing oversight responsibilities. The Audit Committee is composed exclusively of Independent Trustees. Currently, the Audit Committee is composed of Messrs. Reynolds, Wachs and Fertig. Among other things, the Audit Committee makes recommendations to the full Board of Trustees with respect to the engagement of an independent registered public accounting firm and reviews with the independent registered public accounting firm the plan and results of the internal controls, audit engagement and matters having a material effect on the Trust’s financial operations. During the past fiscal year, the Audit Committee met five times, and the Board of Trustees met four times.
The NAV of each Fund is typically determined each business day at 3:00 p.m., Eastern Time on days when                    is open for trading. The [            ] Exchange is open every week, Monday through Friday, except when the following holidays are celebrated: New Year’s Day, Martin Luther King, Jr. Day (the third Monday in January), Presidents’ Day (the third Monday in February), Good Friday, Memorial Day (the last Monday in May), Independence Day, Labor Day (the first Monday in September), Thanksgiving Day (the fourth Thursday in November) and Christmas Day. An Exchange may close early on the business day before each of these holidays and on the day after Thanksgiving Day. Exchange holiday schedules are subject to change without notice. If the exchange or market on which a Fund’s investments are primarily traded closes early, the NAV may be calculated prior to its normal calculation time. Creation/ redemption transaction order time cutoffs would also be accelerated.

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]
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. 
In traditional financial markets, derivatives are used as speculation objects as well as insurance against losses. The latter is known as hedging. One popular variety of derivatives used for hedging are called futures. A future is a contract between two parties in which one party agrees to pay the other a predetermined amount of money for an underlying asset at a specific point in time.
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