Data as of Nov 4, 2026.

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Buffer ETFs

CPSM vs ZJUN: Cap, Buffer & Days Left

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As of Nov 4, 2026 CPSM can fall 2.6% before its buffer engages and ZJUN 1.9%, and CPSM resets 31 days sooner.

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Net assets on Nov 4, 2026: $59m for Calamos S&P 500 Structured Alt Protection ETF - May and $155m for Innovator Equity Defined Protection ETF - 1 Yr June.

At a glance
CPSM Full floor
Full floorCPSM: reference +6.4% since period start, fund +2.3%; buffer Floor; cap +6.7%; Full floor. Data to Nov 4, 2026.full floor beneath+6.4%full floor0% period start+6.7% cap+0.3% more to the capTODAY · SPY +6.4%Full floorCPSM: reference +6.4% since period start, fund +2.3%; buffer Floor; cap +6.7%; Full floor. Data to Nov 4, 2026.full floor beneathfull floor0% start+6.7% cap+6.4% gain captured+0.3% more to the capTODAY · SPY +6.4%

CPSM: reference +6.4% since period start, fund +2.3%; buffer Floor; cap +6.7%; Full floor. Data to Nov 4, 2026.

Data to Nov 4, 2026.
ZJUN Full floor
Full floorZJUN: reference +1.3% since period start, fund +1.6%; buffer Floor; cap +8.1%; Full floor. Data to Nov 4, 2026.full floor beneath+6.7% to capfull floor0% period start+8.1% cap+1.3% gain capturedTODAY · SPY +1.3%Full floorZJUN: reference +1.3% since period start, fund +1.6%; buffer Floor; cap +8.1%; Full floor. Data to Nov 4, 2026.full floor beneathfull floor0% start+8.1% cap+1.3% gain captured+6.7% more to the capTODAY · SPY +1.3%

ZJUN: reference +1.3% since period start, fund +1.6%; buffer Floor; cap +8.1%; Full floor. Data to Nov 4, 2026.

Data to Nov 4, 2026.

Pair scorecard

CPSM costs 0.10 points a year less; both returned +4.8% over a year; ZJUN is 2.6 times larger.

Points (pts) are percentage points.

CPSM vs ZJUN: Cap, Buffer & Days Left
MeasureCPSMZJUN
Return
Total return, 1 year+4.8%+4.8%
Drawdown
Index fall to the buffer6.0%1.3%
Benchmark
What it tracksSPYSPY
Cost and size
Expense ratio0.69%0.79%
Net assets$59m$155m
Holdings
Holdings in commonnot published

Method

Window by window

Window by window: CPSM vs ZJUN: Cap, Buffer & Days Left
Total returnGap to the reference's price return
WindowCPSMZJUNCPSMZJUN
3 months+1.0%+0.7%+1.3 pts+1.1 pts
6 months+2.1%+1.9%−2.4 pts−2.6 pts
1 year+4.8%+4.8%−8.7 pts−8.7 pts
Since launchNot the same days: CPSM May 2024 · ZJUN Jun 2025+18.8%+7.9%−34.5 pts−21.5 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

CPSM Calamos S&P 500 Structured Alt Protection ETF - May · Absorbs the whole loss on SPY and caps the gain at 6.7%, over a period ending Apr 30, 2027 ZJUN Innovator Equity Defined Protection ETF - 1 Yr June · Absorbs the whole loss on SPY and caps the gain at 8.1%, over a period ending May 31, 2027
Reference index SPY SPY
Buffer 100% 100%
Outcome period May 1, 2026 to Apr 30, 2027 May 31, 2026 to May 31, 2027
Days left 177 208
Starting cap +6.7% +8.1%
Can still gain not published 6.0%
Fall before buffer 2.6% 1.9%
Protection left, index points 100.0% of 100.0% 100.0% of 100.0%
Index return this period +6.4% +1.3%
Fund return this period +2.3% +1.6%
State today Open Open
Expense ratio 0.69% 0.79%
Net assets $59m $155m

As of Nov 4, 2026. Source: ETFIQ.

They do not reset together. CPSM has 177 days of its period left and ZJUN has 208, so the two are not the same bet on the same months.

Where each one stands today

CPSM resets first, on Apr 30, 2027, 177 days from now; ZJUN runs to May 31, 2027, 208 days. A fall from here reaches CPSM’s buffer after 2.6% and ZJUN’s after 1.9%. Both track SPY, so what separates them is where each is in its own period.

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About each fund
CPSM

The fund's price can fall 2.6% from here before the buffer starts absorbing losses, by the issuer's number. In index terms, SPY can fall 6.0% 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. 177 days remained on Nov 4, 2026. On Apr 30, 2027 the period ends and a new cap is set.

ZJUN

From its price on Nov 4, 2026, the fund can gain about 6.0% more before it reaches its cap. The fund's price can fall 1.9% from here before the buffer starts absorbing losses, by the issuer's number. In index terms, SPY can fall 1.3% from today's level to the point where the buffer begins. 208 days remained on Nov 4, 2026. On May 31, 2027 the period ends and a new cap is set.

Questions people ask

Which resets first, CPSM or ZJUN?
CPSM ends its outcome period on Apr 30, 2027 and ZJUN on May 31, 2027. A new cap is set the day after each.
Which is cheaper, CPSM or ZJUN?
CPSM charges 0.69% a year and ZJUN charges 0.79%, so CPSM is cheaper. Fees come from each fund's prospectus.
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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, CPSM against ZJUN, data as of Nov 4, 2026. https://etfiq.com/compare/buffer/cpsm-vs-zjun

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