# CBOO (Calamos Bitcoin Structured Alt Protection ETF - October)

Calamos · Buffer ETFs · data as of Sep 12, 2026

As of Sep 12, 2026, Bitcoin is down 36.4% and CBOO's protection has held the loss to 1.2%.

## Key facts

- CBOO, fall before the buffer: 0.0%, as of Sep 12, 2026.
- CBOO, protection left, index points: 63.6%, as of Sep 12, 2026.
- CBOO, days to reset: 25, as of Sep 12, 2026.
- CBOO, net assets: $6m (source, as filed for Apr 30, 2026).
- CBOO, expense ratio: 0.69% (issuer page, Sep 12, 2026).
- CBOO, reference index: Bitcoin, as of Sep 12, 2026.

## Every published field

| Field | Value | Source |
| --- | --- | --- |
| Reference index | Bitcoin | ETFIQ |
| Buffer | 1% to 100% | ETFIQ |
| Outcome period | Oct 7, 2025 to Oct 7, 2026 | ETFIQ |
| Starting cap | +7.3% | ETFIQ |
| Bitcoin return since period start | −36.4% | ETFIQ |
| Fund return since period start | −0.8% | ETFIQ |
| Net assets | $6m | source, as filed for Apr 30, 2026 |
| Band state today | Buffer working | ETFIQ |
| Can still gain | not published | issuer, fund price |
| Fall before buffer | 0.0% | issuer, fund price |
| Fall to the buffer in index terms | 0.0% | ETFIQ |
| Protection left in index points | 63.6% of 98.8% | ETFIQ |
| Days left in period | 25 | ETFIQ |
| Expense ratio | 0.69% | issuer page, Sep 12, 2026 |

## Questions

### How far can CBOO fall before the buffer helps?

0.0% in fund-price terms on Sep 12, 2026, by the issuer's figure. In index terms Bitcoin can fall 0.0% from that level before the buffer begins. Losses until that point are the holder's.

### How much of the CBOO buffer is left?

63.6% of the 98.8% buffer sat below the Bitcoin level on Sep 12, 2026. That is an ETFIQ calculation in index points, on one definition for every issuer.

### When does CBOO reset?

The outcome period ends on Oct 7, 2026, 25 days from the data on Sep 12, 2026. A new cap is set the next day and the buffer starts again.

### What does CBOO cost?

The prospectus expense ratio is 0.69% a year.


## Cite this page

ETFIQ, CBOO, data as of Sep 12, 2026. https://etfiq.com/funds/CBOO
Free to use with attribution; the underlying files are at https://etfiq.com/data/.

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