•	 	Intellectual property rights claims may adversely affect the operation of the Bitcoin Network. Third parties may assert intellectual property rights claims relating to the operation of the Bitcoin Network. Regardless of the merit of any intellectual property or other legal action, any threatened action that reduces confidence in the Bitcoin Network’s long-term viability or the ability of end-users to hold and transfer bitcoin may adversely affect the price of bitcoin and adversely affect the price of the bitcoin futures contracts held by the Fund.

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.

Municipal notes with maturities of three years or less are usually given note ratings (designated SP-1 or SP-2) to distinguish more clearly the credit quality of notes as compared to bonds. Notes rated SP-1 have a very strong or strong capacity to pay principal and interest. Those issues determined to possess overwhelming safety characteristics are given the designation of SP-1+. Notes rated SP-2 have a satisfactory capacity to pay principal and interest.

Each Fund, except for the S&P 500 Dividend Aristocrats ETF, the S&P MidCap 400 Dividend Aristocrats ETF, the Russell 2000 Dividend Growers ETF, the MSCI EAFE Dividend Growers ETF, the MSCI Europe Dividend Growers ETF, the MSCI Emerging Markets Dividend Growers ETF, the DJ Brookfield Global Infrastructure ETF, the Equities for Rising Rates ETF, the S&P 500 Ex-Energy ETF, the S&P 500 Ex-Financials ETF, the S&P 500 Ex-Health Care ETF, the S&P 500 Ex-Technology ETF, the High Yield—Interest Rate Hedged, the Investment Grade—Interest Rate Hedged and the Short Term USD Emerging Markets Bond ETF, is a “non-diversified” series of the Trust. A Fund’s classification as a “non-diversified” investment company means that the proportion of the Fund’s assets that may be invested in the securities of a single issuer is not limited by the 1940 Act. Notwithstanding each Fund’s status as a “non-diversified” investment company under the 1940 Act, each Fund intends to qualify as a RIC accorded special tax treatment under the Code, which imposes its own diversification requirements on these Funds that are less restrictive than the requirements applicable to the “diversified” investment companies under the 1940 Act. A Fund’s ability to pursue its investment strategy may be limited by that Fund’s intention to qualify as a RIC and its strategy may bear adversely on its ability to so qualify. For more details, see “Taxation” below. With respect to a “non-diversified” Fund, a relatively high percentage of such a Fund’s assets may be invested in the securities of a limited number of issuers, primarily within the same economic sector. That Fund’s portfolio securities, therefore, may be more susceptible to any single economic, political, or regulatory occurrence than the portfolio securities of a more diversified investment company.

In order to provide current Share pricing information, an Exchange disseminates an updated Indicative Optimized Portfolio Value (“IOPV”) for each Fund. The Trust is not involved in or responsible for any aspect of the calculation or dissemination of the IOPVs and makes no warranty as to the accuracy of the IOPVs. IOPVs are expected to be disseminated on a per Fund basis every 15 seconds during regular trading hours of an Exchange.
The Administrator pays all fees and expenses that are directly related to the services provided by the Administrator to the Funds; each Fund reimburses the Administrator for all fees and expenses incurred by the Administrator which are not directly related to the services the Administrator provides to the Funds under the service agreement. Each Fund may also reimburse the Administrator for such out-of-pocket expenses as incurred by the Administrator in the performance of its duties. For these services each Fund that was operational for the period indicated paid the Administrator and Citi the amounts set forth below. Because the New Fund was not operational at the end of the Trust’s last fiscal year, information on fees paid to the Administrator and Citi on behalf of the New Fund is not included in this SAI.
 	•	 	Lack of liquid markets, and possible manipulation of blockchain-based assets. Digital assets that are represented and trade on a blockchain may not necessarily benefit from viable trading markets. Stock exchanges have listing requirements and vet issuers, and perhaps users. These conditions may not necessarily be replicated on a blockchain, depending on the platform’s controls and other policies. The more lenient a blockchain is about vetting issuers of digital assets or users that transact on the platform, the higher the potential risk for fraud or the manipulation of digital assets. These factors may decrease liquidity or volume, or increase volatility of digital securities or other assets trading on a blockchain.

Each 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, and ProShares UltraPro Short 20+ Year Treasury is based in whole, or in part, on the ICE U.S. 7-10 Year Bond Index, or ICE U.S. 20+ Year Bond Index, as applicable, owned by Intercontinental Exchange, Inc. or its affiliates and is used by LICENSEE with permission under license by Interactive Data Pricing and Reference Data, LLC, an affiliate of Intercontinental Exchange, Inc. (“Interactive Data”). ICE U.S. 7-10 Year Bond Index™ and ICE U.S. 20+ Year Bond Index™ (collectively, the “Indices”) are trademarks of Intercontinental Exchange, Inc. and its affiliates and used under license.

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.
Qualifying Income described in clause (i) of subparagraph (a) above) will be treated as Qualifying Income. In general, such entities will be treated as partnerships for federal income tax purposes because they meet the passive income requirement under Code section 7704(c)(2). In addition, although in general the passive loss rules of the Code do not apply to RICs, such rules do apply to a RIC with respect to items attributable to an interest in a qualified publicly traded partnership. Moreover, the amounts derived from investments in foreign currency will be treated as Qualifying Income for purposes of subparagraph (a) above. There is a remote possibility that the Internal Revenue Service (“IRS”) could issue guidance contrary to such treatment with respect to foreign currency gains that are not directly related to a RIC’s principal business of investing in stocks or securities (or options or futures with respect to stocks or securities), which could affect a Fund’s ability to meet the 90% gross income test and adversely affect the manner in which that Fund is managed.

Since the introduction of futures, the price of bitcoin has gone up, suggesting that there were more As -- people who wanted to be long bitcoin synthetically -- than Cs -- people who wanted to be short synthetically -- though again it is still early. Crudely speaking, the arbitrage spread suggests that there are also more As than Bs: There are a lot of people who want to be long bitcoin without owning bitcoin, but not so many people who want to own bitcoin without being long bitcoin. (Which makes sense! If you bought a bitcoin and sold a futures contract when Cboe launched its futures last week, you could have locked in a risk-free arbitrage profit of something like $1,200. But if you had just bought a bitcoin, you'd be up about $3,000 by now.) The costs of trading actual bitcoins on bitcoin exchanges -- in terms of blockchain transaction costs, exchange withdrawal limits, etc. -- are significant enough that people who want bitcoin exposure are willing to pay about 2 percent to avoid them.

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.
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.