The Engine Room of an ETF
To understand the hidden detail, you first need to know how ETFs like IBIT and FBTC keep their share price tethered to the actual price of Bitcoin. It’s not magic; it’s a process called "creation and redemption." Large financial firms known as Authorized
Participants (APs) act as the market’s mechanics. When more people want to buy an ETF than sell it, the price can drift higher than the value of the Bitcoin it holds. To fix this, APs step in to "create" new ETF shares. The opposite happens during a sell-off, where APs "redeem" shares to keep the price from falling too far below its underlying value. This arbitrage machine is what makes ETFs work so smoothly, but the way those new shares are created is what really matters.
Cash vs. In-Kind: The Big Divide
When the spot Bitcoin ETFs launched in January 2024, the SEC mandated a specific structure: the "cash-create" model. This meant that when an AP wanted to create new shares of IBIT or FBTC, it had to bring cash to the fund. The fund would then take that cash and go buy Bitcoin. This process is inefficient. It’s like wanting to trade a friend for their sandwich but having to sell your apple for cash first, then giving them the cash for the sandwich. It adds extra steps, costs, and potential tax headaches inside the fund. The gold standard for ETFs, from stocks to actual gold bars, is the "in-kind" model, where the AP can directly swap the underlying asset (in this case, Bitcoin) for ETF shares. This method is cheaper, faster, and far more tax-efficient.
The 'Hidden Detail' Becomes the Main Event
The hidden detail is that these massively popular funds were launched with the less-efficient cash-create model. However, that's changing. In July 2025, the SEC gave crypto ETFs the green light to begin using the superior in-kind model. This shift is the most important structural upgrade to happen since their launch. It allows APs to deliver actual Bitcoin to create new IBIT or FBTC shares, and receive actual Bitcoin when redeeming them. Both BlackRock and Fidelity have moved to embrace this change. Fidelity amended its fund agreement in 2025 to permit in-kind transactions, pending final regulatory approval. BlackRock has already enabled in-kind creations and has been actively lowering the minimum investment required for these swaps, recently dropping it from $25 million to just $1 million to broaden access.
Why This Upgrade Matters for Your Wallet
This isn't just Wall Street plumbing; it has real-world benefits for retail investors. The in-kind model is significantly more tax-efficient. With cash-creates, the fund might be forced to sell Bitcoin to meet redemptions, potentially realizing capital gains that could be passed on to all shareholders. In-kind redemptions avoid this, as the fund simply transfers out the Bitcoin itself without a sale occurring. This structural upgrade also leads to tighter tracking of Bitcoin's price, as the extra buy-sell steps are eliminated. Finally, it reduces transaction costs for the APs, which can translate into tighter bid-ask spreads on the open market, meaning a better price for you when you buy or sell shares.
