While spot Bitcoin ETFs — including BlackRock's IBIT — shed more than $1 billion in net redemptions last week, a quieter counter-trend is underway: structured Bitcoin products built around downside protection are pulling in fresh money.
Calamos Investments reported on May 28, 2026, at 10:03 p.m. ET that its protected Bitcoin ETF suite attracted roughly $10 million to $15 million in inflows over the past several weeks, according to Matt Kaufman, the firm's head of ETFs, speaking on CoinDesk's Public Keys with Jennifer Sanasie.
The contrast is intentional. IBIT's single-day outflow — already covered by Crypoch — was the second-largest in U.S. ETF history, part of a broader spot-fund exodus. Calamos is positioning its products as the structural answer to the question that exit raises: if advisors are leaving spot, where are they going?
How the product works
The mechanics are specific. Calamos allocates roughly 90% of assets into U.S. Treasuries, using that allocation to build the floor of downside protection. The remaining budget buys Bitcoin-linked call spreads through FLEX options. Calamos created its own Bitcoin-linked index after spot Bitcoin ETF options launched, then listed FLEX options tied to that index — a prerequisite for the spread structure.
The result is a product that targets zero downside exposure with capped upside. "You can get upside of Bitcoin with no downside risk," Kaufman said.
The firm offers three versions. One provides full downside protection; two others carry 10% and 20% downside risk, respectively, and return a larger share of Bitcoin's upside in exchange. Products are available in quarterly structures and in laddered formats designed for model portfolios — a feature aimed squarely at RIA platforms and wealth management networks that run standardized sleeves.
The advisor shift
Kaufman drew a clear line between how institutional advisors approached Bitcoin twelve months ago and how they approach it now.
A year ago, the dominant question was binary: does Bitcoin belong in a portfolio at all? That question has been resolved, at least among the advisors Calamos is talking to. The question has moved on. "Now advisors are asking how to improve risk-adjusted returns and portfolio construction using crypto exposure," Kaufman said.
That shift has a direct commercial implication. Protected products let advisors justify Bitcoin allocations to clients who would otherwise veto the drawdown profile. Some investors, Kaufman noted, are moving out of cash-equivalent positions into fully protected Bitcoin ETFs — accepting Bitcoin's volatility on the upside while eliminating it on the downside. For a wealth manager whose client is sitting in a money market fund at 4.5%, a Treasury-backed structure with Bitcoin upside optionality is a pitch that works.
Three lanes, not one
Kaufman's framing of the ETF landscape is worth taking seriously. He described the crypto ETF market as splitting into three distinct strategies: protection, income, and growth.
Protection is Calamos's current lane — capital-efficient exposure with a defined floor. Income is already populated: other issuers have built options-overlay products that sell Bitcoin volatility to generate yield, targeting advisors who want crypto on the income side of a portfolio. Growth is the spot vehicle — undiluted upside and undiluted downside, which is what IBIT and its peers deliver.
The framing matters because it implies the spot ETF category is not losing to a single competitor. It is losing a slice of its potential universe to a structural category that didn't exist eighteen months ago. Advisors who would never have bought IBIT for a risk-averse client can now buy CBTJ or CBOJ instead.
"You don't just have to sit in the spot vehicle anymore and ride out those waves," Kaufman said.
What comes next
Calamos has already moved beyond protected exposure. The firm has launched auto-callable income ETFs and is exploring additional crypto-related strategies, Kaufman said, without specifying them.
On the macro Bitcoin picture, Kaufman was direct: "I think we're going higher." He argued that Bitcoin's persistent volatility is not a bug in the structured-product thesis but its engine. High volatility makes the FLEX call spreads that power upside participation cheaper in certain rate environments and creates demand for the protection overlay among advisors whose clients watch drawdowns closely.
The deeper market-structure implication is this: if the spot-to-structured rotation continues, it changes what the Bitcoin ETF category actually measures. Today, IBIT's flows function as a rough proxy for institutional Bitcoin demand. As protected and income products attract a larger share of the advisor channel, that proxy weakens. Flows into spot ETFs will increasingly represent a specific preference — unhedged directional exposure — rather than crypto demand in aggregate.
For ETF issuers outside the top two or three spot funds, that is a competitive pressure point. The protection and income categories are lightly crowded now. Calamos is early; the asset-management industry is watching.