The equity markets are volatile, and the value of securities, swaps, futures, and other instruments correlated with the equity markets may fluctuate dramatically from day-to-day. Equity markets are subject to corporate, political, regulatory, market and economic developments, as well as developments that impact specific economic sectors, industries or segments of the market. Further, stocks in the Index may underperform other equity investments. Volatility in the markets and/or market developments may cause the value of an investment in the Fund to decrease.
Currently the front month future is the January contract which at last check could be sold for $17,600.  This contract settles in a cash transfer based on the 4:00 pm eastern bitcoin auction price on Wednesday January 17, 2018 established by Gemini who is partnering with Cboe Global Markets.  The bitcoin price at Gemini is close to $16,600 so I will use that for the underlying bitcoin price in this example. 

This Statement of Additional Information (“SAI”) is not a prospectus. It should be read in conjunction with the Prospectus of ProShares Trust (the “Trust”), dated October 1, 2017, the Prospectus dated November 16, 2017 for ProShares Decline of the Retail Store ETF, the Prospectus dated November 16, 2017 for ProShares Long Online/Short Stores ETF, the Prospectus dated             , 2018 for ProShares Bitcoin Futures Strategy ETF, the Prospectus dated             , 2018 for ProShares Short Bitcoin Futures Strategy ETF, the Prospectus dated             , 2018 for ProShares Blockchain/Bitcoin Strategy ETF, and the Prospectus dated             , 2018 for ProShares Bitcoin Futures/Equity Strategy ETF each as may be amended or supplemented, each of which incorporates this SAI by reference. A copy of the Prospectuses and a copy of the Annual Report to shareholders for the Funds that have completed a fiscal year are available, without charge, upon request to the address above, by telephone at the number above, or on the Trust’s website at www.ProShares.com. The Financial Statements and Notes contained in the Annual Report to Shareholders for the fiscal year ended May 31, 2017 are incorporated by reference into and are deemed part of this SAI. The principal U.S. national stock exchange on which all Funds (except those noted below) identified in this SAI are listed is NYSE Arca. The S&P MidCap 400 Dividend Aristocrats ETF, the Russell 2000 Dividend Growers ETF, the ProShares MSCI Emerging Markets Dividend Growers ETF, the ProShares S&P 500 Dividend Aristocrats ETF, the ProShares MSCI EAFE Dividend Growers ETF, the MSCI Europe Dividend Growers ETF, the Morningstar Alternatives Solution ETF, the Global Listed Private Equity ETF, the Large Cap Core Plus, the High Yield—Interest Rate Hedged, the Investment Grade—Interest Rate Hedged, the Short Term USD Emerging Markets Bond ETF, the ProShares Managed Futures Strategy ETF, the Merger ETF, K-1 Free Crude Oil Strategy ETF and the CDS Short North American HY Credit ETF are listed on the Bats BZX Exchange, Inc. The UltraPro Short QQQ®, the UltraShort Nasdaq Biotechnology, the UltraPro Short Nasdaq Biotechnology, the UltraPro QQQ®, the Ultra Nasdaq Biotechnology the UltraPro Nasdaq Biotechnology and the Equities for Rising Rates ETF are listed on The NASDAQ Stock 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 Custodian is responsible for safeguarding the Funds’ cash and securities, receiving and delivering securities, collecting the Funds’ interest and dividends, and performing certain administrative duties, all as directed by authorized persons. The Custodian is also responsible for the appointment and oversight of any sub-custodian banks and for providing reports regarding such sub-custodian banks and clearing agencies.
When a Fund purchases or sells a futures contract, or buys or sells an option thereon, the Fund “covers” its position. To cover its position, a Fund may enter into an offsetting position, earmark or segregate with its custodian bank or on the official books and records of the Fund cash or liquid instruments (marked-to-market on a daily basis) that, when added to any amounts deposited with a futures commission merchant as margin, are equal to the market value of the futures contract or otherwise “cover” its position. When required by law, a Fund will segregate liquid assets in an amount equal to the value of the Fund’s total assets committed to the consummation of such futures contracts. Obligations under futures contracts so covered will not be considered senior securities for purposes of a Fund’s investment restriction concerning senior securities.
 	•	 	Swap Agreements are agreements entered into primarily with major global financial institutions for a specified period ranging from a day to more than one year. In a standard “swap” transaction, two parties agree to exchange the return (or differentials in rates of return) earned or realized on particular predetermined investments or instruments.

There's a lot of ins and outs which can get confusing in arbitrage trading. We won't go into the technicals of why futures contracts trade at a premium to spot price. You can read a full explanation here. If it's not of interest to you, all you need to know is that there's a tendency, the further out in time the futures contract expires, for the premium to spot to be higher and higher in nominal percentage terms.
×