Data as of Nov 4, 2026.

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Buffer ETFs

CPSO vs PMOC: Cap, Buffer & Days Left

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As of Nov 4, 2026 PMOC can fall 1.2% before its buffer engages and CPSO 0.6%.

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Net assets on Nov 4, 2026: $34m for Calamos S&P 500 Structured Alt Protection ETF - October and $7.2m for PGIM S&P 500 Max Buffer ETF - October.

At a glance
CPSO Full floor
Full floorCPSO: reference +0.4% since period start, fund +0.6%; buffer Floor; cap +8.8%; Full floor. Data to Nov 4, 2026.full floor beneath+8.4% to capfull floor0% period start+8.8% cap+0.4% gain capturedTODAY · SPY +0.4%Full floorCPSO: reference +0.4% since period start, fund +0.6%; buffer Floor; cap +8.8%; Full floor. Data to Nov 4, 2026.full floor beneathfull floor0% start+8.8% cap+0.4% gain captured+8.4% more to the capTODAY · SPY +0.4%

CPSO: reference +0.4% since period start, fund +0.6%; buffer Floor; cap +8.8%; Full floor. Data to Nov 4, 2026.

Data to Nov 4, 2026.
PMOC Full floor
Full floorPMOC: reference +0.6% since period start, fund +0.7%; buffer Floor; cap +8.7%; Full floor. Data to Nov 4, 2026.full floor beneath+8.1% to capfull floor0% period start+8.7% cap+0.6% gain capturedTODAY · SPY +0.6%Full floorPMOC: reference +0.6% since period start, fund +0.7%; buffer Floor; cap +8.7%; Full floor. Data to Nov 4, 2026.full floor beneathfull floor0% start+8.7% cap+0.6% gain captured+8.1% more to the capTODAY · SPY +0.6%

PMOC: reference +0.6% since period start, fund +0.7%; buffer Floor; cap +8.7%; Full floor. Data to Nov 4, 2026.

Data to Nov 4, 2026.

Pair scorecard

PMOC costs 0.19 points a year less; their one-year returns differ by 0.3 points; CPSO is 4.7 times larger.

Points (pts) are percentage points.

CPSO vs PMOC: Cap, Buffer & Days Left
MeasureCPSOPMOC
Return
Total return, 1 year+6.1%+6.4%
Drawdown
Index fall to the buffer0.4%0.5%
Benchmark
What it tracksSPYSPY
Cost and size
Expense ratio0.69%0.50%
Net assets$34m$7.2m
Holdings
Holdings in commonnot published

Method

Window by window

Window by window: CPSO vs PMOC: Cap, Buffer & Days Left
Total returnGap to the reference's price return
WindowCPSOPMOCCPSOPMOC
3 months+1.4%+1.6%+1.8 pts+1.9 pts
6 months+3.1%+3.3%−1.3 pts−1.2 pts
1 year+6.1%+6.4%−7.5 pts−7.1 pts
Since launchNot the same days: CPSO Oct 2024 · PMOC Oct 2025+12.7%+6.5%−22.1 pts−8.2 pts

Each fund's gap is to its reference's price return, dividends left out: the basis the outcome period uses. Open this comparison in the app →

Side by side

CPSO Calamos S&P 500 Structured Alt Protection ETF - October · Absorbs the whole loss on SPY and caps the gain at 8.8%, over a period ending Sep 30, 2027 PMOC PGIM S&P 500 Max Buffer ETF - October · Absorbs the whole loss on SPY and caps the gain at 8.7%, over a period ending Sep 30, 2027
Issuer Calamos PGIM
Reference index SPY SPY
Buffer 100% 100%
Outcome period Oct 1, 2026 to Sep 30, 2027 Oct 1, 2026 to Sep 30, 2027
Days left 330 330
Starting cap +8.8% +8.7%
Can still gain not published 7.5%
Fall before buffer 0.6% 1.2%
Protection left, index points 100.0% of 100.0% 100.0% of 100.0%
Index return this period +0.4% +0.6%
Fund return this period +0.6% +0.7%
State today Open Open
Expense ratio 0.69% 0.50%
Net assets $34m $7.2m

As of Nov 4, 2026. Source: ETFIQ.

Where each one stands today

CPSO resets first, on Sep 30, 2027, 330 days from now; PMOC runs to Sep 30, 2027, 330 days. A fall from here reaches CPSO’s buffer after 0.6% and PMOC’s after 1.2%. Both track SPY, so what separates them is where each is in its own period.

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About each fund
CPSO

The fund's price can fall 0.6% from here before the buffer starts absorbing losses, by the issuer's number. In index terms, SPY can fall 0.4% 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. 330 days remained on Nov 4, 2026. On Sep 30, 2027 the period ends and a new cap is set.

PMOC

From its price on Nov 4, 2026, the fund can gain about 7.5% more before it reaches its cap. The fund's price can fall 1.2% from here before the buffer starts absorbing losses, by the issuer's number. In index terms, SPY can fall 0.5% from today's level to the point where the buffer begins.

Questions people ask

Which resets first, CPSO or PMOC?
CPSO ends its outcome period on Sep 30, 2027 and PMOC on Sep 30, 2027. A new cap is set the day after each.
Which is cheaper, CPSO or PMOC?
CPSO charges 0.69% a year and PMOC charges 0.50%, so PMOC is cheaper. Fees come from each fund's prospectus.
Other comparisons
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Sources and dates

Links are sources, not endorsements. A comparison is not a recommendation.

How this is computed

ETFIQ calculates every number 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 number is an ETFIQ calculation with distributions reinvested.

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ETFIQ, CPSO against PMOC, data as of Nov 4, 2026. https://etfiq.com/compare/buffer/cpso-vs-pmoc

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