Proshares, a leading U.S. asset manager, introduced two new bitcoin exchange-traded funds (ETFs) on Tuesday, April 3: the Ultra Bitcoin ETF (ticker: BITU) and the Ultrashort Bitcoin ETF (ticker: SBIT). These products mark the first-ever leveraged and inverse ETFs in the United States that directly track the spot price of bitcoin.
Product Mechanics: 2x Long and 2x Short
BITU seeks to deliver twice (2x) the daily return of bitcoin, while SBIT aims to provide twice the inverse (−2x) of bitcoin's daily return. For example, if bitcoin rises 1% in a day, BITU is designed to gain approximately 2%; if bitcoin falls 1%, SBIT would gain about 2%. Both funds achieve their leverage through derivative instruments rather than holding physical bitcoin directly.
Analyst Commentary: Modest Early Flows
Bloomberg's senior ETF analyst Eric Balchunas commented on X (formerly Twitter): “The first ever 2x and -2x spot bitcoin ETFs hit the market today from Proshares. BITU and SBIT (tickers could have been better). BITX is 2x but it tracks futures and BITI is -1x but is also futures. Fee 95bps on both. Haven’t traded too much so far, under $1m.” The analyst noted that while the concept is innovative, initial trading volume remained modest at less than $1 million on launch day.
Proshares' Bitcoin ETF Evolution
Proshares made history in October 2021 by launching the first bitcoin futures ETF in the U.S. (BITO). It has since rolled out a short bitcoin futures ETF (BITI), an ether futures ETF (EETH), a short ether ETF (SETH), and a combined bitcoin-ether ETF (BETE). The introduction of BITU and SBIT extends the company's leveraged and inverse strategy from futures to spot-based ETFs, offering traders more direct exposure to bitcoin’s price.
Michael L. Sapir, CEO of Proshares, stated: “BITU and SBIT are designed to address the challenge of acquiring leveraged or short exposure to bitcoin, which can be onerous and expensive. BITU offers investors the opportunity to pursue magnified bitcoin returns or target a level of exposure with less money at risk. SBIT allows investors to seek to profit when the price of bitcoin drops or hedge their bitcoin exposure.”
Market Implications and Risk Considerations
Leveraged ETFs reset daily to maintain their target multiples, which can lead to path-dependency and compounding decay over longer holding periods. Therefore, BITU and SBIT are best suited for short-term trading rather than buy-and-hold strategies. While these products provide a more direct tool for aggressive crypto speculation, the doubling of both gains and losses in a volatile market poses significant risk. Institutional adoption may remain limited until the market matures further.

