CPSU vs DMAY: Cap, Buffer & Days Left
As of Oct 13, 2026 DMAY can fall 9.3% before its buffer engages and CPSU 1.6%, and DMAY resets 7 days sooner. Net assets on Oct 13, 2026: $29m for Calamos S&P 500 ® Structured Alt Protection ETF - June and $390m for FT Vest U.S. Equity Deep Buffer ETF - May.
CPSU costs 0.16 points a year less; their one-year returns differ by 4.6 points; DMAY is 13.6 times larger.
Points (pts) are percentage points.
| CPSU | DMAY | |
|---|---|---|
| Expense ratio | 0.69% | 0.85% |
| Net assets | $29m | $390m |
| Total return, 1 year | +4.9% | +9.5% |
| What it tracks | SPY | SPY |
| Holdings in common | not published | |
| Index fall to the buffer | 2.5% | 9.7% |
CPSU: reference +2.6% since period start, fund +1.4%; buffer Floor; cap +7.3%; Full floor. Figures to Oct 13, 2026.
Figures to Oct 13, 2026.
DMAY: reference +5.3% since period start, fund +3.8%; buffer −5 to −30; cap +13.6%; Between buffer and cap. Figures to Oct 13, 2026.
DMAY: reference +5.3% since period start, fund +3.8%; buffer −5 to −30; cap +13.6%; Between buffer and cap. Figures to Oct 13, 2026.
These are two different products. CPSU is a floor fund, which caps how far a holder can fall. DMAY 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
DMAY resets first, on May 21, 2027, 220 days from now; CPSU runs to May 28, 2027, 227 days. A fall from here reaches CPSU’s buffer after 1.6% and DMAY’s after 9.3%. Both track SPY, so what separates them is where each is in its own period.
Performance, window by window
| Total return | Gap to the reference's price return | |||
|---|---|---|---|---|
| Window | CPSU | DMAY | CPSU | DMAY |
| 3 months | +1.2% | +2.4% | −2.3 pts | −1.1 pts |
| 6 months | +2.1% | +4.9% | −9.9 pts | −7.2 pts |
| 1 year | +4.9% | +9.5% | −12.4 pts | −7.8 pts |
| 3 years | not published | +42.3% | not published | −38.0 pts |
| Since launch Not the same days: CPSU Jun 2025 · DMAY May 2020 | +7.9% | +57.5% | −23.3 pts | −106.2 pts |
Each fund's gap is to its reference's price return, dividends left out: the basis the outcome period uses. Source: ETFIQ. Open this comparison in the app →
On the same fields
As of Oct 13, 2026. Source: ETFIQ.
About CPSU
The fund's price can fall 1.6% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 2.5% 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. 227 days remained on Oct 13, 2026. On May 28, 2027 the period ends and a new cap is set.
About DMAY
From its price on Oct 13, 2026, the fund can gain about 8.6% more before it reaches its cap. The fund's price can fall 9.3% from here before the buffer starts absorbing losses, by the issuer's figure. In index terms, SPY can fall 9.7% from today's level to the point where the buffer begins. Protection left, in index points: 25.0% of the 25.0% buffer still sits below today's SPY level. 220 days remained on Oct 13, 2026. On May 21, 2027 the period ends and a new cap is set.
Questions people ask
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, CPSU against DMAY, data as of Oct 13, 2026. https://etfiq.com/compare/buffer/cpsu-vs-dmay
ETFIQ. (Oct 13, 2026). CPSU against DMAY. Retrieved from https://etfiq.com/compare/buffer/cpsu-vs-dmay
[CPSU against DMAY (ETFIQ, Oct 13, 2026)](https://etfiq.com/compare/buffer/cpsu-vs-dmay)
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