Paul Krugman, Nobel Memorial Prize in Economic Sciences winner does not like bitcoin, has repeated numerous times that it is a bubble that will not last[110] and links it to Tulip mania.[111] American business magnate Warren Buffett thinks that cryptocurrency will come to a bad ending.[112] In October 2017, BlackRock CEO Laurence D. Fink called bitcoin an 'index of money laundering'.[113] "Bitcoin just shows you how much demand for money laundering there is in the world," he said.
A Fund’s current obligations under most swap agreements (total return swaps, equity/index swaps, interest rate swaps) will be accrued daily (offset against any amounts owed to the Fund) and any accrued but unpaid net amounts owed to a swap counterparty will be covered by segregating or earmarking cash or other assets determined to be liquid, but typically no payments will be made until the settlement date. In connection with CDS in which a Fund is a “buyer”, the Fund will segregate or earmark cash or assets determined to be liquid by the Advisor, with a value at least equal to the Fund’s maximum potential exposure under the swap (e.g., any accrued but unpaid net amounts owed by the Fund to any clearinghouse counterparty). In connection with CDS in which a Fund is a “seller”, however, the Fund will segregate or earmark cash or assets determined to be liquid by the Advisor, with a value at least equal to the full notional amount of the swap (minus any variation margin or amounts owed to the Fund under an offsetting cleared transaction). This segregation or earmarking is intended to ensure that a Fund has assets available to satisfy its potential obligations with respect to the transaction. Each Fund reserves the right to modify its asset segregation policies in the future, including modifications to comply with any changes in the positions articulated by the SEC or its staff regarding asset segregation. Swap agreements that cannot be terminated in the ordinary course of business within seven days at approximately the amount a Fund has valued the asset may be considered to be illiquid for purposes of the Fund’s illiquid investment limitations.
Elaborating a bit on the concept of Cryptocurrency and the blockchain effect before we move onto the central theme. As put in words by Daniel Gasteiger on the topic ‘Blockchain Demystified’ at TEDxLausanne,‘A blockchain is nothing but a database, a database that is public, therefore not owned by anybody. Distributed hence not stored centrally on one computer but on many computers across the world. Constantly synchronized to keep the transactions up to date and secured overall by the art of cryptography to make it tamper proof and hacker proof. These four features make this technology exceptional.’ Daniel’s strong belief in the solidarity of the concept of Cryptocurrency motivated him to leave his full-fledged career of 20 years in financial services to focus on the concept of Blockchain. Looking to know more about how to formulate Cryptocurrency strategies? Read our blog on Cryptocurrencies Trading Strategy With Data Extraction Technique. 
Start small. Get familiar with the platform you're using before you make any significant trades. BitMEX offers a sandbox using Testnet coins. OKCoin and BitVC do not offer a demo version, but you can start small with 1 contract and test how Open Long, Open Short, Close Long, Close Short and different order types work. If you contact CryptoFacilities you can also get access to a demo platform to use.
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.
I’m an elderly gentleman, closing in on 68 years of age. My son introduced me to Crypto in late 2012. After doing a lot of researching Btc I felt strongly that It had a lot of growth and potential ahead of it. So my son and I built my 1st rig and I started mining in January 2013, pulled $5,000 from my IRA and bought Btc at $13.44 and have never looked back since. The sweetest sound that I’ve ever heard was the clink of my 1st mined Bitcoin way back when. That was as satisfying a note as there ever was on any musical scale. Nothing but happy days ahead since. Don’t get me wrong, there have been bumps in this Crypto highway, the demise of the Silk Road, Mt Gox, DAO hack to name a few but as a HOLDer (holding on for the long duration) not a HODLer (hanging on for dear life) and not day trading, has rewarded me with quite a decent profit. It just takes a lot of patience (Sisu) and doing your research with due diligence. I have since invested in Ethereum (Dec 2015), Monero (Jan 2016) and lately Omisego (July 2017) all purchased from some of my profits from Btc to go along with my newly acquired free Bch and recently free Omg. I’m currently operating 3 rigs equipped with 6 gpus each. 2 mining Eth and 1 Monero for now, all of which will be re-evaluated after Metropolis kicks in to see which direction I go from here. So I ‘m back to doing more research in order to help with my next moves but I’ll always be a strong believer in Ethereum which is where I’ve made my money so far. HOLDing on to the rest for now. Btc $5,000-10,000, Eth $2,500- 5,000, Monero $200-400, Omg $100-1,000 no one ever really knows but MY research says yes and so far MY research has not proven me wrong. Bought Btc at $13.44, Eth at .80, Monero at .48, Omg at .43 Bch for free. No where to go but up for me. Just biding my time. It’s taken me over 4 and a half years to get here but I’ve made over $4,000,000 so far with just my original investment plus the cost of my rigs and I’m still sitting on a lot more. Taking a position and HOLDing is where the real profit is and it isn’t going to happen overnight. So if you want aggravation and ulcers go ahead and day trade, try and beat the Market I wish you luck but the real money comes with Research, HOLDing and Patience. Hope this advice helps because in the long run what it all comes down to, its just Eths, You and Me hopefully making the right decisions.
Various government agencies, departments, and courts have classified bitcoin differently. China Central Bank banned the handling of bitcoins by financial institutions in China in early 2014.[69] In Russia, though cryptocurrencies are legal, it is illegal to actually purchase goods with any currency other than the Russian ruble.[70] Regulations and bans that apply to bitcoin probably extend to similar cryptocurrency systems.[71]
The proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions. The scheme is largely dependent on the coin, and there's currently no standard form of it. Some cryptocurrencies use a combined proof-of-work/proof-of-stake scheme.[18]
Caspian is a full-stack cryptoasset management platform tying together the biggest crypto exchanges in a single interface, so as to facilitate investments in crypto instruments for newcomers and veterans alike. The joint venture between heavyweights Tora and Kenetic brings to the table a wealth of experience in asset management, accumulated over decades of building and operating trading platforms and technologies.
The question is: Do we live in a society, or do we just have a list of prices and you decide which ones to pay? Do we all try to get along together and share the world, giving due consideration to each other's needs, or do rich people just get to do whatever they want? Much of the article is devoted to the cool things that the Flatiron Institute is doing, but much of it is devoted to people fretting that there might be a downside to rich individuals determining the direction of basic science and using their money to crowd out traditional universities. Meanwhile Simons sits back and smokes and tosses pennies into the no-smoking jar.
Standard & Poor’s® and S&P® are registered trademarks of Standard & Poor’s Financial Services LLC (“S&P”) and Dow Jones® is a registered trademark of Dow Jones Trademark Holdings LLC (“Dow Jones”). The Indexes are a product of S&P Dow Jones Indices LLC or its affiliates, and have been licensed for use by ProShares. The Funds are not sponsored, endorsed, sold or promoted by S&P Dow Jones Indices LLC, Dow Jones, S&P, any of their third party licensors, or any of their respective affiliates (collectively, “S&P Dow Jones Indices”). S&P Dow Jones Indices does not make any representation or warranty, express or implied, to the owners of the Funds or any member of the public regarding the advisability of investing in securities generally or in the Funds particularly or the ability of the Indexes to track general market performance. S&P Dow Jones Indices’ only relationship to ProShares with respect to the Indexes is the licensing of the Indexes and certain trademarks, service marks and/or trade names of S&P Dow Jones Indices. The Indexes are determined, composed and calculated by S&P Dow Jones Indices without regard to ProShares or the Funds. S&P Dow Jones Indices have no obligation to take the needs of ProShares or the owners of the Funds into consideration in determining, composing or calculating the Indexes. S&P Dow Jones Indices are not responsible for and have not participated in the determination of the prices, and amount of the Funds or the timing of the issuance or sale of the Funds or in the determination or calculation of the equation by which the Funds are to be converted into cash or redeemed, as the case may be. S&P Dow Jones Indices have no obligation or liability in connection with the administration, marketing or trading of the Funds. There is no assurance that investment products based on the Indexes will accurately track index performance or provide positive investment returns. S&P Dow Jones Indices LLC and its subsidiaries are not investment advisers. Inclusion of a security within an index is not a recommendation by S&P Dow Jones Indices to buy, sell, or hold such security, nor is it considered to be investment advice.
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:
The Shares are not sponsored, endorsed, sold or promoted by BofA Merrill Lynch. Neither BofA Merrill Lynch nor any of Standard & Poor’s, a division of The McGraw-Hill Companies, Inc., Standard & Poor’s Financial Services LLC, MSCI, Inc. or Frank Russell Company (the “Exchanges and Entities”) have passed on the legality or suitability of, or the accuracy or adequacy of descriptions and disclosures relating to, the Shares, nor do they make any representation or warranty, express or implied, to the owners of the Shares or any member of the public regarding the advisability of investing in securities generally or in the Shares particularly or the ability of the Index to track general hedge fund performance. BofA Merrill Lynch’s and the Exchanges and Entities’ only relationship to the Trust is the licensing of certain trademarks and trade names of BofA Merrill Lynch and the Exchanges and Entities and of the Index, which indices are determined, composed and calculated by BofA Merrill Lynch without regard to the Trust or the Shares. BofA Merrill Lynch and the Exchanges and Entities have no obligation to take the needs of the Trust or the owners of the Shares into consideration in determining, composing or calculating the Index. BofA Merrill Lynch and the Exchanges and Entities are not responsible for and have not participated in the determination of the timing of, prices at, or quantities of the Shares to be issued or in the determination or calculation of the equation by which the Shares are to be converted into or redeemed for cash or other assets. BofA Merrill Lynch and the Exchanges and Entities have no obligation or liability in connection with the administration, marketing or trading of the Shares.
This means simply that you put down 1 bitcoin and you can trade 20 on OKCoin, or 100 bitcoin on BitMEX. The multiple refers to the initial margin you need to open the nominal position value. You simply set the margin aside as collateral, and if the position goes against you, the collateral will be used to exit your position into a liquidation, or margin call.
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]
The biggest problem of the Blockchain is its reliance on miners. This is exactly why the cryptocurrency called IOTA (the Internet of Thigs Application) was created in 2016. IOTA also battles increasing transaction fees and network scalability. IOTA’s blockchain is called Tangle. It is a blockchain with no blocks and no chains. In this system, the users themselves are responsible for validating transactions. This means there’s no need for approval from miners; so users enjoy a fee-free transaction and an increased process speed.
The policy for each Fund regarding purchases and sales of securities is that primary consideration will be given to obtaining the most favorable prices and efficient executions of transactions. Consistent with this policy, when securities transactions are effected on a stock exchange, the policy is to pay commissions that are considered fair and reasonable without necessarily determining that the lowest possible commissions are paid in all circumstances. The Advisor believes that a requirement always to seek the lowest possible commission cost could impede effective portfolio management and preclude the Fund and the Advisor from obtaining a high quality of brokerage and execution services. In seeking to determine the reasonableness of brokerage commissions paid in any transaction, the Advisor relies upon its experience and knowledge regarding commissions generally charged by various brokers and on its judgment in evaluating the brokerage and execution services received from the broker. Such determinations are necessarily subjective and imprecise, as in most cases an exact dollar value for those services is not ascertainable. In addition to commission rates, when selecting a broker for a particular transaction, the Advisor considers but is not limited to the following efficiency factors: the broker’s availability, willingness to commit capital, reputation and integrity, facilities reliability, access to research, execution capacity and responsiveness.
The Fund seeks inverse or “short” exposure through short positions in bitcoin futures contracts and other financial instruments. This will cause the Fund to be exposed to certain risks associated with selling securities short. These risks include, under certain market conditions, an increase in the volatility and decrease in the liquidity of asset underlying the short position, which may lower the Fund’s return, result in a loss, have the effect of limiting the Fund’s ability to obtain inverse exposure through financial instruments such as swap agreements and futures contracts, or require the Fund to seek inverse exposure through alternative investment strategies that may be less desirable or more costly to implement. To the extent that, at any particular point in time, the asset underlying the short position may be thinly traded or have a limited market, including due to regulatory action, the Fund may be unable to meet its investment objective due to a lack of available securities or counterparties. During such periods, the Fund’s ability to issue additional Creation Units may be adversely affected. Obtaining inverse exposure through these instruments may be considered an aggressive investment technique. Any income, dividends or payments by the assets underlying the Fund’s short positions will negatively impact the Fund.

To the extent that an Underlying RIC realizes net losses on its investments for a given taxable year, a Fund that invests in the Underlying RIC will not be able to benefit from those losses until (i) the Underlying RIC realizes gains that it can reduce by those losses, or (ii) the Fund recognizes its share of those losses when it disposes of shares in the Underlying RIC. Moreover, when a Fund makes such a disposition, any loss it recognizes will be a capital loss. A Fund will not be able to offset any capital losses from its dispositions of shares of the Underlying RIC against its ordinary income (including distributions deriving from net short-term capital gains realized by the Underlying RIC). In addition, a portion of such capital loss may be long-term, which will first offset the Fund’s capital gains, increasing the likelihood that the Fund’s short-term capital gains will be distributed to shareholders as ordinary income.


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.
•   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.
The Advisor, its principals, officers and employees (and members of their families) and affiliates may participate directly or indirectly as investors in the Advisor’s clients, such as the Funds. Thus the Advisor may recommend to clients the purchase or sale of securities in which it, or its officers, employees or related persons have a financial interest. The Advisor may give advice and take actions in the performance of its duties to its clients that differ from the advice given or the timing and nature of actions taken, with respect to other clients’ accounts and/or employees’ accounts that may invest in some of the same securities recommended to clients.
Alexander Ilyasov, ProShare Advisors: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. ProFund Advisors LLC: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. Ryan Dofflemeyer, ProShare Advisors: Portfolio Manager since January 2011, and a registered associated person and an NFA associate member of ProShares Capital Management LLC since October 2010.
ADRs represent the right to receive securities of foreign issuers deposited in a domestic bank or a correspondent bank. ADRs are an alternative to purchasing the underlying securities in their national markets and currencies. For many foreign securities, U.S. dollar-denominated ADRs, which are traded in the United States on exchanges or over-the-counter (“OTC”), are issued by domestic banks. In general, there is a large, liquid market in the United States for many ADRs. Investments in ADRs have certain advantages over direct investment in the underlying foreign securities because: (i) ADRs are U.S. dollar-denominated investments that are easily transferable and for which market quotations are readily available, and (ii) issuers whose securities are represented by ADRs are generally subject to auditing, accounting and financial reporting standards similar to those applied to domestic issuers. ADRs do not eliminate all risk inherent in investing in the securities of foreign issuers. By investing in ADRs rather than directly in the stock of foreign issuers outside the U.S., however, the Funds may avoid certain risks related to investing in foreign securities on non-U.S. markets.

Don’t be greedy. No one ever lost money taking a profit. As a coin begins to grow, the greed inside us grows along with it. If a coin increases by 30%, why not consider taking profit? Even if goals are set to 40% or 50%, you should at least pull out some of the profit on the way up in case a coin doesn’t reach the goal. If you wait too long or try to get out at a higher point, you risk losing profit you already earned or even turning that profit into a loss. Get into the habit of taking profits and scouting for re-entry if you want to continue reaping potential profits.


Alexander Ilyasov, ProShare Advisors: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. ProFund Advisors LLC: Senior Portfolio Manager since October 2013 and Portfolio Manager from November 2009 through September 2013. Ryan Dofflemeyer, ProShare Advisors: Portfolio Manager since January 2011, and a registered associated person and an NFA associate member of ProShares Capital Management LLC since October 2010.
If the price drops to $500, you earn 11.73 BTC on the position and have 20.06 BTC left, which at $500 per BTC is worth $10,000! This is a simple example just to show you, even if you're a small bitcoin holder, bitcoin futures are a valuable risk management tool. You could have performed this "hedge" at 50x leverage by putting down just 8.33/50= 0.17 BTC worth of margin!
•   New Fund Risk — The Fund recently commenced operations, has a limited operating history, and started operations with a small asset base. There can be no assurance that the Fund will be successful or grow to or maintain a viable size, that an active trading market for the Fund’s shares will develop or be maintained, or that the Fund’s shares’ listing will continue unchanged.
Special Note Regarding the Correlation Risks of Geared Funds (All Funds, except the Matching ProShares Funds, the Managed Futures Strategy ETF, the Crude Oil Strategy ETF, the Bitcoin Futures Strategy ETF, the Short Bitcoin Futures Strategy ETF, the Blockchain/Bitcoin Strategy ETF, and the Bitcoin Futures/Equity Strategy ETF and the CDS Short North American HY Credit ETF)
•   Liquidity Risk — In certain circumstances, such as the disruption of the orderly markets for the bitcoin futures contracts in which the Fund invests, the Fund might not be able to acquire or dispose of certain holdings quickly or at prices that represent true market value in the judgment of ProShare Advisors. Markets may be disrupted by a number of events, including but not limited to cyber-attacks, economic crises, natural disasters, new legislation, or regulatory changes inside or outside the U.S.
Under current law, income of a RIC that would be treated as UBTI if earned directly by a tax-exempt entity generally will not be attributed as UBTI to a tax-exempt entity that is a shareholder in the RIC. Notwithstanding this “blocking” effect, a tax-exempt shareholder could realize UBTI by virtue of its investment in a Fund if Shares in a Fund constitute debt-financed property in the hands of the tax-exempt shareholder within the meaning of Code section 514(b).
Each Fund may invest in money market instruments, which short-term cash instruments that have a remaining maturity of 397 days or less and exhibit high credit profiles, or cash or cash equivalents such as other high credit quality, short-term fixed income or similar securities, including (i) money market funds, (ii) U.S. Treasury Bills, which are U.S. government securities that have initial maturities of one year or less, and are supported by the full faith and credit of the U.S. government, and (iii) Repurchase Agreements, which are contracts in which a seller of securities, usually U.S. government securities or other money market instruments, agrees to buy them back at a specified time and price. Repurchase agreements are primarily used by the Funds as a short-term investment vehicle for cash positions.

No Independent Trustee (or an immediate family member thereof) had any direct or indirect interest, the value of which exceeded $120,000, in the Advisor, the principal underwriter of the Trust, or any entity controlling, controlled by or under common control with the Advisor or the principal underwriter of the Trust (not including registered investment companies) during the two most recently completed calendar years.
  •   an investment company, or person that would be an investment company but for the exclusions provided by sections 3(c)(1) and 3(c)(7) of the 1940 Act, having the same investment adviser or principal underwriter as the Trust or having an investment adviser or principal underwriter that directly or indirectly controls, is controlled by, or is under common control with the Advisor or principal underwriter of the Trust;

  •   an officer of an investment company, or a person that would be an investment company but for the exclusions provided by sections 3(c)(1) and 3(c)(7) of the 1940 Act, having the same investment adviser or principal underwriter as the Trust or having an investment adviser or principal underwriter that directly or indirectly controls, is controlled by, or is under common control with the Advisor or principal underwriter of the Trust;
Moody’s ratings for state and municipal notes and other short-term loans are designated Moody’s Investment Grade (MIG) and for variable rate demand obligations are designated Variable Moody’s Investment Grade (VMIG). This distinction recognizes the differences between short-term credit risk and long-term risk. Loans bearing the designation MIG-1/VMIG-1 are of the best quality, enjoying strong protection from established cash flows of funds for their servicing or from established and broad-based access to the market for refinancing, or both. Loans bearing/with the designation MIG-2/VMIG-2 are of high quality, with ample margins of protection, although not as large as the preceding group.
Typically exchanging is done through matching the buy and sell orders placed on the system of the exchange. The sell orders are made at an offer price (or ask) while the buy order (or bid) is made to buy bitcoins. It is similar to buying stocks online where you need to enter the desired price (or market price) for buy/sell along with the quantity. These orders enter the order book and are removed once the exchange transaction is complete.
In September 2015, the establishment of the peer-reviewed academic journal Ledger (ISSN 2379-5980) was announced. It covers studies of cryptocurrencies and related technologies, and is published by the University of Pittsburgh.[114][115] The journal encourages authors to digitally sign a file hash of submitted papers, which will then be timestamped into the bitcoin blockchain. Authors are also asked to include a personal bitcoin address in the first page of their papers.[116][117]

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, 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
With the increased use of technologies such as the Internet and the dependence on computer systems to perform necessary business functions, each Fund is susceptible to operational and information security risks. In general, cyber incidents can result from deliberate attacks or unintentional events. Cyber attacks include, but are not limited to gaining unauthorized access to digital systems for purposes of misappropriating assets or sensitive information, corrupting data, or causing operational disruption. Cyber attacks may also be carried out in a manner that does not require gaining unauthorized access, such as causing denial-of-service attacks on websites. Cyber security failures or breaches of a Fund’s third -party service provider (including, but not limited to, index providers, the administrator and transfer agent) or the issuers of securities in which the Funds invest, have the ability to cause disruptions and impact business operations, potentially resulting in financial losses, the inability of Fund shareholders to transact business, violations of applicable privacy and other laws, regulatory fines, penalties, reputational damage, reimbursement or other compensation costs, and/or additional compliance costs. In addition, substantial costs may be incurred in order to prevent any cyber incidents in the future. The Funds and their shareholders could be negatively impacted as a result. While the Funds have established business continuity plans and systems to prevent such cyber attacks, there are inherent limitations in such plans and systems including the possibility that certain risks have not been identified. Furthermore, the Funds cannot control the cyber security plans and systems put in place by issuers in which the Funds invest.
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.
Crypto Facilities and the CME Group  have been calculating and publishing the Bitcoin Reference Rate (BRR) since November 2016. Such an official rate is a prerequisite of options trading in the traditional markets. The BRR is calculated based on the rates from the biggest exchanges: Bitstamp, GDAX, itBit, and Kraken. More concretely, it is calculated based on all Bitcoin vs. USD trades on the participating exchanges between 3 and 4 p.m. London time. To calculate the BRR, the hour between 3 and 4 is divided into 12 intervals of 5 minutes. For each interval, the volume-weighted median of the Bitcoin price is calculated (statistically, the median, in contrast to the average, prevents single outliers from distorting the price). The BRR is then the average of these 12 median values. More details about the calculation of the BRR can be found in the BRR whitepaper.
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