The first timestamping scheme invented was the proof-of-work scheme. The most widely used proof-of-work schemes are based on SHA-256 and scrypt.[18] The latter now dominates over the world of cryptocurrencies, with at least 480 confirmed implementations.[37] Some other hashing algorithms that are used for proof-of-work include CryptoNight, Blake, SHA-3, and X11.
You can find other information about ProShares on the SEC’s website (www.sec.gov) or you can get copies of this information after payment of a duplicating fee by electronic request at publicinfo@sec.gov or by writing to the Public Reference Section of the SEC, Washington, D.C. 20549-0102. Information about ProShares, including their SAI, can be reviewed and copied at the SEC’s Public Reference Room in Washington, D.C. For information on the Public Reference Room, call the SEC at (202) 551-8090.
Unsponsored ADR programs are organized independently and without the cooperation of the issuer of the underlying securities. As a result, available information concerning the issuers may not be as current for unsponsored ADRs, and the price of unsponsored depositary receipts may be more volatile than if such instruments were sponsored by the issuer and/or there may be no correlation between available information and the market value.
During the fiscal year ended May 31, 2017, the Advisor recouped $161,605 from UltraPro S&P 500 Fund pursuant to an Investment Advisory Agreement and the Expense Limitation Agreement between the Advisor and the Trust, on behalf of the Fund. During the fiscal year ended May 31, 2016, the Advisor recouped $155,882 from the UltraPro S&P 500 Fund pursuant to an Investment Advisory Agreement and the Expense Limitation Agreement between the Advisor and the Trust, on behalf of the Fund. During the fiscal year ended May 31, 2015, the Advisor recouped $259,539 from the UltraPro S&P 500 Fund pursuant to an Investment Advisory Agreement and the Expense Limitation Agreement between the Advisor and the Trust, on behalf of the Fund.
A key attribute of a futures market is how its contract’s prices vary by expiration date. The succession of futures prices over time is called the “term structure”. If supply is stable (no seasonality or shortages) then typically futures prices will increase with expirations further in the future. This term structure configuration is called “contango” and it accounts for the fact that carry costs (e.g., time value of money) and profit expectations increase with time. Unless there are big changes in interest rates or the way that Bitcoin exchanges work I expect the level of contango in the Bitcoin futures term structure to be small. Bitcoins don’t cost much to hodl (once you have your hardware wallet) and there’s no apparent seasonality. The chart below from VIX Central shows a typical Bitcoin term structure (click on chart to get current data):
Making money arbitraging bitcoin futures can be extremely simple. Futures contracts typically trade at a premium, and all you have to do, starting with USD, is buy bitcoin at Spot price and sell futures of the same amount at premium price. Then just wait until expiration to make your arb profit in bitcoin (which you can then put in USD). Whether it's a weekly, monthly, quarterly, or any futures contract, as long as it's in a premium, you lock in the sale price and earn the arbitrage profit.
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