All charts and data below are CPI-U inflation-adjusted and with dividends reinvested. (Why?)

Total Real Returns

CPST: Total Real Return Chart (Dividends Reinvested, Inflation Adjusted)

CPST real return snapshot: after CPI-U inflation, CPST returned +1.35% over the past year and +0.23% YTD, with dividends reinvested. Since Sep. 3, 2024, CPST is up +6.33% in real purchasing-power return, or +2.95%/yr, and is currently −0.57% below its real total-return high on Sep. 3, 2026.

Data ending Thu Oct. 15, 2026

Growth of $10,000

Tue 2024-09-03💬 to Thu 2026-10-15 Overall
Return 		Exponential
Trendline
CPST × 		+6.33%
+2.95%/yr 		+3.09%/yr
R2=0.756
Calamos S&P 500 Structured Alt Protection ETF - September Exchange-Traded Fund

Growth of $10,000 Summary

Tue 2024-09-03💬 to Thu 2026-10-15 Start
Value 		End
Value
CPST × 		$10,000.00
2024-09-03 		$10,632.99
2026-10-15

This Year’s Performance

through 2026-10-15

  YTD YoY
CPST × 		+0.23% +1.35%

Drawdowns

  Current
Drawdown 		Worst
Drawdown
CPST × 		−0.57%
on 2026-10-15
from 2026-09-03 peak 		−4.37%
on 2025-04-08
from 2025-01-23 peak

Rolling Returns

Period ending Thu 2026-10-15 1 yr 2 yr 3 yr 5 yr 10 yr
CPST × 		+1.35% +5.04%
+2.49%/yr 		— — —

Annual Returns

Year CPST
2026 (YTD) +0.23%
2025 +3.95%
2024 +2.06%