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CPSY short interest NYSE Arca

Calamos S&P 500 Structured Alt. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: exchange-traded product: its share count floats with creation and redemption.

Shares short
5,530
vs previous settlement
−3,143 (-36.2%)
days to cover
6.02
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for CPSY shares short

Days to cover

FINRA's own figure: reported shares short divided by the security's average daily trading volume, published alongside each settlement.

Aggregate net short position time series for CPSY days to cover

Fails to deliver

The SEC's fails-to-deliver figure for CPSY: the aggregate net balance of shares that failed to be delivered at each settlement date, published by the SEC twice a month and shown here verbatim for the trailing window. A balance is not a daily flow, and a fail has many ordinary causes; the SEC says it cannot guarantee the accuracy of the data. See what fails to deliver are and the largest balances today.

Last balance on file
309
28 Aug 2026
Highest in window
17,876
6 Feb 2026
Days with a balance
53
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Calamos S&P 500 Structured Alt fails to deliver

Source: U.S. Securities and Exchange Commission, fails-to-deliver data (public domain). Only settlement days with a positive balance appear; the largest balance in the window was 18K shares.

History

Every FINRA settlement we hold for CPSY, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20265,530−3,1436.02
31 Aug 20268,673−4,06514.80
14 Aug 202612,738−28110.61
31 Jul 202613,019−2,8884.98
15 Jul 202615,907+5,28835.27
30 Jun 202610,619+1,44219.66
15 Jun 20269,177+148.57
29 May 20269,163−2,53319.79
15 May 202611,696+6976.30
30 Apr 202610,999+14210.22
15 Apr 202610,857−3625.25
31 Mar 202610,893−1,8666.20
13 Mar 202612,759−2,3909.31
27 Feb 202615,149−2,7839.14
13 Feb 202617,932−14,7883.02
30 Jan 202632,720+10,8707.25
15 Jan 202621,850+20,9511.17
31 Dec 2025899−2,6671.00
15 Dec 20253,566+2,7421.00
28 Nov 2025824−731.00
14 Nov 2025897+61.00
31 Oct 2025891−1,4761.00
15 Oct 20252,367+1,9696.08
30 Sep 2025398+11.00
15 Sep 2025397−1,4101.00
29 Aug 20251,807+1,3237.03
15 Aug 2025484+4021.00
31 Jul 202582−851.00
15 Jul 2025167−5851.00
30 Jun 2025752−552.47
13 Jun 2025807−1181.00
30 May 2025925−10,0001.00
15 May 202510,925−22,3082.47
30 Apr 202533,233+3,6746.77
15 Apr 202529,559+4705.91
31 Mar 202529,089−8,9683.79
14 Mar 202538,057+2,69011.05
28 Feb 202535,367+2,74815.56
14 Feb 202532,619−4,70510.39
31 Jan 202537,324−13,7762.45
15 Jan 202551,100–1.00

Scroll inside the table for earlier settlements, back to 15 Jan 2025.

Questions

Frequently asked questions

What is CPSY's short interest?
5,530 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 3,143 from the previous settlement.
Why is there no percentage for CPSY?
Because no defensible share count exists to divide by: exchange-traded product: its share count floats with creation and redemption. An exchange-traded product's share count changes every day as units are created and redeemed, so no filing gives a stable count to divide by. FINRA's shares-short figure is exact; a percentage of it would not be.
What is CPSY's days to cover?
6.02 days for settlement date 15 Sep 2026: FINRA's own short interest ratio, the reported shares short divided by average daily trading volume, published in the same file and shown verbatim. We hold no volume data ourselves.
Is this the short float?
No. This page shows FINRA's share count only. Short float divides that count by the public float, and short interest as we publish it elsewhere divides it by shares outstanding from SEC filings. Neither denominator is available for this line, so neither ratio is shown.
How often does this update?
FINRA member firms report short positions as of the 15th and the last business day of each month, and FINRA publishes the consolidated figures about nine business days later. We ingest each file the day it appears and re-read recent settlements for revisions.

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