Data as of .
CPSO vs OCTU: which one stands where?
As of Sep 21, 2026 OCTU can fall 11.2% before its buffer engages and CPSO 5.9%, and CPSO resets 1 days sooner.
These are two different products. CPSO is a floor fund, which caps how far a holder can fall. OCTU is a buffer fund, which absorbs the first part of a fall and leaves everything below it with the holder.
Where each one stands today
CPSO resets first, on Sep 30, 2026, 9 days from now; OCTU runs to Sep 30, 2026, 10 days. A fall from here reaches CPSO’s buffer after 5.9% and OCTU’s after 11.2%. Both track SPY, so what separates them is where each is in its own period.
Every figure is ETFIQ’s own, from the issuer’s published outcome-period terms. A buffer ETF holds FLEX options on its reference index rather than shares, so there is no holdings overlap between two of them to report.
Performance, window by window
| Window | Total return | Gap to the reference | ||
|---|---|---|---|---|
| CPSO | OCTU | CPSO | OCTU | |
| 3 months | +1.6% | +1.1% | −0.6 pts | −1.2 pts |
| 6 months | +4.8% | +11.6% | −13.2 pts | −6.5 pts |
| 1 year | +5.8% | +10.7% | −10.8 pts | −5.9 pts |
| CPSO Calamos S&P 500 ® Structured Alt Protection ETF - October Absorbs losses from 0.6% to 100.0% on SPY and caps the gain at 5.8%, over a period ending Sep 30, 2026 | OCTU AllianzIM U.S. Equity Buffer15 Uncapped ETF - Oct Absorbs the first 15% of loss on SPY and does not cap the gain, over a period ending Sep 30, 2026 | |
|---|---|---|
| Issuer | Calamos | AllianzIM |
| Reference index | SPY | SPY |
| Buffer | 1% to 100% | 15% |
| Outcome period | Oct 1, 2025 to Sep 30, 2026 | Oct 1, 2025 to Sep 30, 2026 |
| Days left | 9 | 10 |
| Starting cap | +5.8% | uncapped |
| Can still gain | not published | uncapped |
| Fall before buffer | 5.9% | 11.2% |
| Protection left, index points | 99.4% of 99.4% | 15.0% of 15.0% |
| Index return this period | +13.9% | +16.2% |
| Fund return this period | +5.6% | +11.7% |
| State today | At cap | Uncapped |
| Expense ratio | 0.69% | 0.74% |
| Net assets | $28m | $58m |
CPSO in plain words
SPY had already risen past this fund's cap of +5.8% for the period on Sep 21, 2026, so in index terms there is no more upside to collect. The fund's price can fall 5.9% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 12.8% from today's level to the point where the buffer begins. Protection left, in index points: 99.4% of the 99.4% buffer still sits below today's SPY level. 9 days remained on Sep 21, 2026. On Sep 30, 2026 the period ends and a new cap is set.
OCTU in plain words
This fund has no cap. It takes a share of any further rise in SPY. The fund's price can fall 11.2% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 13.9% from today's level to the point where the buffer begins. Protection left, in index points: 15.0% of the 15.0% buffer still sits below today's SPY level. 10 days remained on Sep 21, 2026.
Questions people ask
- Which resets first, CPSO or OCTU?
- CPSO ends its outcome period on Sep 30, 2026 and OCTU on Sep 30, 2026. A new cap is set the day after each.
- Which is cheaper, CPSO or OCTU?
- CPSO charges 0.69% a year and OCTU charges 0.74%, so CPSO is cheaper. Fees come from each fund's prospectus.
Other comparisons
Where these figures came from
ETFIQ links to the documents behind every figure. It is not affiliated with any issuer, and a link is not an endorsement.
Cite this page. ETFIQ, CPSO against OCTU, data as of Sep 21, 2026. https://etfiq.com/compare/buffer/cpso-vs-octu Free to use with attribution; the underlying files are at Open data.