Data as of .
CPSF vs SIXF: which one stands where?
As of Sep 21, 2026 CPSF can fall 3.7% before its buffer engages and SIXF 2.6%, and CPSF resets 1 days sooner.
These are two different products. CPSF is a floor fund, which caps how far a holder can fall. SIXF 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
CPSF resets first, on Jan 29, 2027, 130 days from now; SIXF runs to Jan 31, 2027, 131 days. A fall from here reaches CPSF’s buffer after 3.7% and SIXF’s after 2.6%. 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 | ||
|---|---|---|---|---|
| CPSF | SIXF | CPSF | SIXF | |
| 3 months | +1.3% | +3.4% | −1.0 pts | +1.1 pts |
| 6 months | +4.0% | +12.2% | −14.1 pts | −5.8 pts |
| 1 year | +5.8% | +13.3% | −10.8 pts | −3.3 pts |
| CPSF Calamos S&P 500 ® Structured Alt Protection ETF - February Absorbs losses from 0.4% to 100.0% on SPY and caps the gain at 5.9%, over a period ending Jan 29, 2027 | SIXF AllianzIM U.S. Equity Buffer10 ETF - Feb Absorbs the first 10% of loss on SPY and caps the gain at 7.8%, over a period ending Jan 31, 2027 | |
|---|---|---|
| Issuer | Calamos | AllianzIM |
| Reference index | SPY | SPY |
| Buffer | 0% to 100% | 10% |
| Outcome period | Feb 2, 2026 to Jan 29, 2027 | Aug 1, 2026 to Jan 31, 2027 |
| Days left | 130 | 131 |
| Starting cap | +5.9% | +7.8% |
| Can still gain | not published | 5.0% |
| Fall before buffer | 3.7% | 2.6% |
| Protection left, index points | 99.6% of 99.6% | 10.0% of 10.0% |
| Index return this period | +9.5% | +3.6% |
| Fund return this period | +3.5% | +2.3% |
| State today | At cap | Open |
| Expense ratio | 0.69% | 0.74% |
| Net assets | $35m | $51m |
CPSF in plain words
SPY had already risen past this fund's cap of +5.9% for the period on Sep 21, 2026, so in index terms there is no more upside to collect. The fund's price can fall 3.7% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 9.1% from today's level to the point where the buffer begins. Protection left, in index points: 99.6% of the 99.6% buffer still sits below today's SPY level. 130 days remained on Sep 21, 2026. On Jan 29, 2027 the period ends and a new cap is set.
SIXF in plain words
From its price on Sep 21, 2026, the fund can gain about 5.0% more before it reaches its cap. The fund's price can fall 2.6% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 3.5% from today's level to the point where the buffer begins. Protection left, in index points: 10.0% of the 10.0% buffer still sits below today's SPY level. 131 days remained on Sep 21, 2026. On Jan 31, 2027 the period ends and a new cap is set.
Questions people ask
- Which resets first, CPSF or SIXF?
- CPSF ends its outcome period on Jan 29, 2027 and SIXF on Jan 31, 2027. A new cap is set the day after each.
- Which is cheaper, CPSF or SIXF?
- CPSF charges 0.69% a year and SIXF charges 0.74%, so CPSF 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, CPSF against SIXF, data as of Sep 21, 2026. https://etfiq.com/compare/buffer/cpsf-vs-sixf Free to use with attribution; the underlying files are at Open data.