Calamos Bitcoin 80 Series Structured Alt Protection ETF – October (CBTO)

What is CBTO, and how does it differ from owning Bitcoin directly?

CBTO is an exchange-traded fund that gives investors Bitcoin exposure without holding Bitcoin itself. Instead, it uses financial options—contracts that specify a return outcome based on Bitcoin’s price—to deliver a defined set of results. Those results are: if Bitcoin rises, you capture gains up to a predetermined cap (roughly 35 percent, though the exact level changes daily). If Bitcoin falls, your maximum loss is 20 percent, enforced by an 80 percent downside protection floor. The fund references Bitcoin’s price through the CME CF Bitcoin Reference Rate—New York Variant (BRRNY), a standard benchmark for spot Bitcoin pricing.

The difference from direct Bitcoin ownership is profound. A Bitcoin investor owns the asset outright; they capture every percentage point of movement, up or down. A CBTO investor owns a structured package: the upside is capped, the downside is floored, and both outcomes are locked in at the beginning of the outcome period.

Why would an investor choose an outcome-based Bitcoin fund instead of buying Bitcoin directly?

Many investors want Bitcoin exposure but fear catastrophic loss. Bitcoin can drop 50 percent or more in short periods; it has historical swings exceeding 80 percent in a single year. That volatility attracts some investors and repels others. For risk-averse investors, Bitcoin’s downside feels unbounded and unmanageable.

CBTO offers certainty about the worst case. If an investor buys at the start of the October outcome period and holds until the end of September the following year, their maximum loss is fixed at 20 percent, no worse. That certainty appeals to conservative portfolios, clients who have experienced past market crashes and are gun-shy, or situations where the investor’s risk tolerance simply does not allow for 50 percent swings.

The tradeoff is explicit: cap the upside in exchange for a floor on the downside. If Bitcoin rallies 60 percent, CBTO captures only 35 percent (or whatever the specific cap is). If Bitcoin crashes 40 percent, CBTO falls only 20 percent. The fund costs fees (0.69 percent annually) to maintain the options positions that deliver this outcome.

When does the October outcome period begin and end?

The October series runs from October 1 through September 30 of the following year—a calendar-adjacent one-year period. An investor who buys CBTO on October 1 and holds through September 30 receives the contractual cap or floor. Someone who buys in November or December and sells in August will receive whatever market price prevails at sale, not the contractual outcomes. That is the series’ central constraint: the outcomes only apply to the full twelve-month outcome period.

This is why Calamos offers multiple series. Investors unable or unwilling to hold from October to September can buy CBTA (April series), CBTJ (January), CBTY (July), or CBTL (which holds all four simultaneously). The October series suits investors whose capital becomes available in autumn, or those who psychologically prefer an October portfolio review cycle.

How are the cap and floor determined, and do they ever change?

The cap and floor are determined at the outset of the outcome period using options pricing. At the beginning of October, Calamos’s team uses market data on Bitcoin’s volatility, interest rates, and time value to set the cap and floor such that the options strategy is self-funding (the premium earned from selling upside caps pays for the cost of providing downside protection). Once October 1 arrives, those levels are locked. They do not change even if Bitcoin’s volatility spikes or plummets afterward.

The cap and floor remain static for the full year. If Bitcoin tripled tomorrow, the cap would still be the same cap set on October 1. If Bitcoin crashed 80 percent in month three, the floor would still be 20 percent loss, no worse. That immutability is both a strength (certainty) and a limitation (inability to adapt to changed circumstances).

The cap level has historically varied by series and year based on market conditions. Periods of high volatility or elevated options prices tend to produce tighter (lower) caps; periods of low volatility may produce more generous (higher) caps. Comparing caps across different series reveals what the market expected about Bitcoin’s volatility at different times.

What happens to CBTO when the outcome period ends on September 30?

When September 30 arrives, the outcome period is complete. Investors who held the full year lock in their contractual return: either the capped upside or the protected downside, depending on Bitcoin’s actual price movement. The fund then matures and is replaced or rolled forward.

From a practical standpoint, investors do not need to do anything. If they want to maintain exposure, they can buy the next October series (the new year’s October-to-September series) or one of the other active series. Or they can exit entirely. Calamos handles the administrative logistics of the maturity; the investor simply makes a buy-or-sell decision.

How much does it cost to own CBTO, and what does the 0.69 percent expense ratio cover?

CBTO charges 0.69 percent annually in operating expenses. This covers the fund’s operational costs, trading commissions, and the cost of maintaining the options positions that create the cap and collar. The options are not free; Calamos is essentially paying the options market a premium to lock in a floor, and that cost flows through to the expense ratio.

The net cap you observe—say, 34.55 percent—is net of that 0.69 percent fee. The gross cap before the fee might be 35.16 percent. The difference between gross and net returns is the fee being charged. Over the full year, if Bitcoin gains 40 percent gross, it would be worth 39.31 percent net after the fee (but CBTO would cap at 34.55 percent, so the fee is cost on top of the cap constraint).

What are the key risks of owning CBTO?

The primary risk is entry-exit timing. Buy in December, sell in April, and you do not receive the contractual cap or floor; you receive the market price, which may be well above the floor or below the cap. This makes CBTO unsuitable for investors who might need to liquidate partway through the outcome period.

The second risk is opportunity cost. If Bitcoin rallies 70 percent during the outcome period and CBTO’s cap is 35 percent, you earned 35 percent while the asset moved 70 percent. You missed the upper half of the move. That is the price of protection; over many outcome periods, a significant portion of Bitcoin’s upside is sacrificed to fund downside protection.

The third risk is options market risk. The options referenced in the fund are financial contracts; if they become illiquid, repriced sharply, or impaired due to market stress, the fund’s performance can diverge unexpectedly from its stated outcomes. This is rare but not zero probability.

The fourth risk is that a 20 percent loss, while better than 50 percent, is still a loss. During a bitcoin drawdown, CBTO will fall, likely alongside most equity and risk assets. It is not a hedge; it is a reduced-downside play. Investors should not confuse “80 percent protected” with “safe” or “guaranteed to be positive.”

How would an investor research CBTO before committing capital?

Start with Calamos’s fact sheet and prospectus for CBTO specifically. They detail the current cap and floor, the expense ratio, the underlying Bitcoin exposure, and the outcome period dates. Understand the exact start and end dates; confirm you can hold for the full year without liquidity needs.

Look at historical data on prior October series. How often did Bitcoin stay within the cap and floor? What was the actual return of a prior October series versus a direct Bitcoin investment? This shows the cost of protection over real market cycles.

Compare the cap to Bitcoin’s recent volatility and price trends. If Bitcoin has already moved 25 percent in the first month of the outcome period, a 35 percent cap may be tight; there is less room to run. If Bitcoin is consolidating, a 35 percent cap might be generous, and CBTO could outperform spot Bitcoin.

Check the underlying Bitcoin exposure. Do the embedded options reference a Bitcoin ETF (iShares, Grayscale, etc.), Bitcoin futures, or a dedicated Bitcoin index? This affects liquidity and counterparty risk.

Finally, calculate the true cost. Compare CBTO’s expense ratio to a spot Bitcoin ETF’s fee (often 0.2 percent or less), then add the opportunity cost of a capped upside. Over time, that cost accumulates; CBTO is a defensive position, appropriate for investors who value downside certainty over upside capture.