BlackRock's iShares Bitcoin Trust (IBIT) has soared just short of a major milestone, with assets under management between roughly $98 billion and $100 billion, according to market reports.
In just over a year since its inception, the fund has generated approximately $244 million to $245 million in annual revenue with steady inflows and a 0.25% management fee. This rapid rise has made IBIT one of the most profitable products in BlackRock's lineup.
Rapid growth and profits
IBIT reached its current size in approximately 435 days. That pace is much faster than the pace many legacy funds took to build similar size, with Vanguard's S&P 500 ETF (VOO) taking about 2,011 days to reach $100 billion, according to the report.
Market watchers say IBIT could become the fastest ETF in history to reach $100 billion. Bloomberg analyst Eric Balciunas called the rise “absurd.”
The calculation is easy. Large-scale flows and rising Bitcoin prices will increase the amount of assets under management and increase fee income. That loop was strong this year.
4 dollars It's just shy of $100 billion, making it BlackRock's most profitable ETF based on current assets under management. Check out the rest of the top 10 ages. It's absurd. pic.twitter.com/E8ZMI2wynx
— Eric Balchunas (@EricBalchunas) October 6, 2025
Flow numbers and market movements
In the most recent trading day, the US Spot Bitcoin ETF had net inflows of nearly $1.2 billion. IBIT reportedly received approximately $970 million of this total.
Based on market coverage, more than half of ETF inflows into the U.S. market have gone into IBIT, highlighting its appeal to many investors. Inflows of this magnitude can increase demand for the underlying Bitcoin and amplify price movements.
Some traders are closely monitoring these days of inflows, as similar spikes in the past have reached near all-time highs in regional prices.
Market impact and risks
The report identifies some clear risks for investors and the broader market. One is the premium or discount that occurs between an ETF's market price and its net asset value. In moments of stress, that gap can widen further.
The other thing is regulation. Rules within the United States or abroad may change, which may affect flows. Competition is also a factor. Fee pressure from rival issuers could change revenue forecasts.
Finally, it is easy to grow quickly at first. As your base grows, it becomes harder to maintain this pace.
Mechanism and strategy movement
IBIT's structure relies on daily creation and redemption by authorized participants, and a large-scale custodial setup is used to hold Bitcoin.
BlackRock is considering product expansions such as a Bitcoin “premium income” ETF that aims to generate yield through options strategies, and has taken steps such as filing to form a supporting trust company, according to filings and industry reports. These moves suggest the company is planning multiple ways to meet demand.
Featured images from Newscom, charts from TradingView
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