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 +2.49% over the past year and +0.52% YTD, with dividends reinvested. Since Sep. 3, 2024, CPST is up +6.63% in real purchasing-power return, or +3.37%/yr, and is currently −0.06% below its real total-return high on Aug. 7, 2026.

Data ending Wed Aug. 12, 2026

Growth of $10,000

Tue 2024-09-03💬 to Wed 2026-08-12 Overall
Return 		Exponential
Trendline
CPST × 		+6.63%
+3.37%/yr 		+3.22%/yr
R2=0.726
Calamos S&P 500 Structured Alt Protection ETF - September Exchange-Traded Fund

Growth of $10,000 Summary

Tue 2024-09-03💬 to Wed 2026-08-12 Start
Value 		End
Value
CPST × 		$10,000.00
2024-09-03 		$10,663.50
2026-08-12

This Year’s Performance

through 2026-08-12

  YTD YoY
CPST × 		+0.52% +2.49%

Drawdowns

  Current
Drawdown 		Worst
Drawdown
CPST × 		−0.06%
on 2026-08-12
from 2026-08-07 peak 		−4.37%
on 2025-04-08
from 2025-01-23 peak

Rolling Returns

Period ending Wed 2026-08-12 1 yr 2 yr 3 yr 5 yr 10 yr
CPST × 		+2.49% — — — —

Annual Returns

Year CPST
2026 (YTD) +0.52%
2025 +3.95%
2024 +2.06%