Which resets first, CPSN or DECW?

CPSN ends its outcome period on Oct 30, 2026 and DECW on Nov 30, 2026. A new cap is set the day after each.

Which is cheaper, CPSN or DECW?

CPSN charges 0.69% a year and DECW charges 0.74%, so CPSN is cheaper. Fees come from each fund's prospectus.

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CPSN vs DECW: Cap, Buffer & Days Left

As of Oct 22, 2026 DECW can fall 8.7% before its buffer engages and CPSN 6.2%, and CPSN resets 31 days sooner. Net assets: $34m on Oct 22, 2026 for Calamos S&P 500 Structured Alt Protection ETF - November, and $230m on Oct 21, 2026 for AllianzIM U.S. Equity Buffer20 ETF - Dec.

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Answers cite the figures on this page.

CPSN costs 0.05 points a year less; their one-year returns differ by 4.5 points; DECW is 6.8 times larger.

Points (pts) are percentage points.

CPSN vs DECW: Cap, Buffer & Days Left
	CPSN	DECW
Expense ratio	0.69%	0.74%
Net assets, as of Oct 21, 2026	$34m	$230m
Total return, 1 year	+6.1%	+10.6%
What it tracks	SPY	SPY
Holdings in common	not published
Index fall to the buffer	10.6%	10.5%

CPSNAt its cap

CPSN: reference +11.8% since period start, fund +5.9%; buffer Floor; cap +6.8%; At its cap. Figures to Oct 22, 2026.

Figures to Oct 22, 2026.

DECWAt its cap

DECW: reference +11.8% since period start, fund +8.7%; buffer 0 to −20; cap +11.3%; At its cap. Figures to Oct 22, 2026.

These are two different products. CPSN is a floor fund, which caps how far a holder can fall. DECW is a buffer fund, which absorbs the first part of a fall and leaves everything below it with the holder.

Both are already at their cap, so neither gains from more rise in the index before the period ends.

They do not reset together. CPSN has 8 days of its period left and DECW has 39, so the two are not the same bet on the same months.

Where each one stands today

CPSN resets first, on Oct 30, 2026, 8 days from now; DECW runs to Nov 30, 2026, 39 days. A fall from here reaches CPSN’s buffer after 6.2% and DECW’s after 8.7%. Both track SPY, so what separates them is where each is in its own period.

Performance, window by window

Performance, window by window: CPSN vs DECW: Cap, Buffer & Days Left
	Total return		Gap to the reference's price return
Window	CPSN	DECW	CPSN	DECW
3 months	+2.2%	+2.8%	−1.3 pts	−0.7 pts
6 months	+3.8%	+5.5%	−4.1 pts	−2.3 pts
1 year	+6.1%	+10.6%	−8.3 pts	−3.8 pts
3 years	–	+43.4%	–	−38.3 pts
Since launch Not the same days: CPSN Nov 2024 · DECW Dec 2022	+12.9%	+48.0%	−20.9 pts	−39.6 pts

Each fund's gap is to its reference's price return, dividends left out: the basis the outcome period uses. Source: ETFIQ. – means no data for this window, usually because the fund is younger than it. Open this comparison in the app →

On the same fields

CPSN

Calamos S&P 500 Structured Alt Protection ETF - November · Absorbs the whole loss on SPY and caps the gain at 6.8%, over a period ending Oct 30, 2026

DECW

AllianzIM U.S. Equity Buffer20 ETF - Dec · Absorbs the first 20% of loss on SPY and caps the gain at 11.3%, over a period ending Nov 30, 2026

Issuer Calamos AllianzIM

Reference index SPY SPY

Buffer 100% 20%

Outcome period Nov 3, 2025 to Oct 30, 2026 Dec 1, 2025 to Nov 30, 2026

Days left 8 39

Starting cap +6.8% +11.3%

Can still gain not published 1.7%

Fall before buffer 6.2% 8.7%

Protection left, index points 100.0% of 100.0% 20.0% of 20.0%

Index return this period +11.8% +11.8%

Fund return this period +5.9% +8.7%

State today At cap At cap

Expense ratio 0.69% 0.74%

Net assets, CPSN as of Oct 22, 2026 and DECW as of Oct 21, 2026 $34m $230m

As of Oct 22, 2026. Source: ETFIQ.

About CPSN

SPY had already risen past this fund's cap of +6.8% for the period on Oct 22, 2026, so in index terms there is no more upside to collect. The fund's price can fall 6.2% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 10.6% from today's level to the point where the buffer begins. Protection left, in index points: 100.0% of the 100.0% buffer still sits below today's SPY level. 8 days remained on Oct 22, 2026. On Oct 30, 2026 the period ends and a new cap is set.

About DECW

SPY had already risen past this fund's cap of +11.3% for the period on Oct 22, 2026, so in index terms there is no more upside to collect. The fund's own price can still drift up to about 1.7% as the period runs out. The fund's price can fall 8.7% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 10.5% from today's level to the point where the buffer begins. Protection left, in index points: 20.0% of the 20.0% buffer still sits below today's SPY level. 39 days remained on Oct 22, 2026. On Nov 30, 2026 the period ends and a new cap is set.

Questions people ask

Which resets first, CPSN or DECW?: CPSN ends its outcome period on Oct 30, 2026 and DECW on Nov 30, 2026. A new cap is set the day after each.
Which is cheaper, CPSN or DECW?: CPSN charges 0.69% a year and DECW charges 0.74%, so CPSN is cheaper. Fees come from each fund's prospectus.

Other comparisons

CPSN vs GOCT CPSN vs DNOV CPSN vs DOCT CPSN vs FOCT DECW vs DECP DECW vs DLNV DECW vs DDTD DECW vs DDFD

S&P 500 (SPY) →All buffer ETFs ranked by the Downside Cover Score →How the scores are computed →CPSN on its own →DECW on its own →DECW dividend history →How every figure is computed →Standards and sources →

Where these figures came from

CPSN filings on SEC EDGAR ↗Calamos website ↗DECW filings on SEC EDGAR ↗AllianzIM page for DECW ↗

ETFIQ links to the documents behind every figure; a link is not an endorsement. A comparison is not a recommendation.

How this is computed

ETFIQ calculates every figure from each issuer’s published outcome-period terms. Buffer ETFs hold options on an index, not shares, so there is no holdings overlap to report.

Every figure is an ETFIQ calculation with distributions reinvested.

Cite this pageCitation, APA and Markdown

ETFIQ, CPSN against DECW, data as of Oct 22, 2026. https://etfiq.com/compare/buffer/cpsn-vs-decw

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Free to use with attribution for figures ETFIQ computes; issuer data stays under its owner's terms.