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CPSJ 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
30,644
vs previous settlement
+3,532 (+13.0%)
days to cover
16.83
Settlement date
15 Sep 2026

Shares short over time

Aggregate net short position time series for CPSJ 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 CPSJ days to cover

Fails to deliver

The SEC's fails-to-deliver figure for CPSJ: 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.

Latest balance
938
14 Sep 2026
Highest in window
105,041
6 Jul 2026
Days with a balance
41
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 105K shares.

History

Every FINRA settlement we hold for CPSJ, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202630,644+3,53216.83
31 Aug 202627,112−44,32620.07
14 Aug 202671,438+5,1129.41
31 Jul 202666,326+39,8865.15
15 Jul 202626,440+26,3101.00
30 Jun 202613001.00
15 Jun 2026130−131.00
29 May 2026143+131.00
15 May 2026130−2,5301.00
30 Apr 20262,660+5442.42
15 Apr 20262,11601.21
31 Mar 20262,116−25.19
13 Mar 20262,118−2781.31
27 Feb 20262,396−3261.61
13 Feb 20262,722+2,7211.00
31 Dec 20251−4211.00
15 Dec 2025422−2981.00
28 Nov 2025720+1571.00
14 Nov 2025563−1,2551.00
15 Oct 20251,818+1,4401.00
30 Sep 2025378−1,1271.00
15 Sep 20251,505+1,1271.00
29 Aug 2025378−9,9551.00
15 Aug 202510,333−4,1712.60
31 Jul 202514,504+1,0891.00
15 Jul 202513,415+13,0361.00
30 Jun 2025379−4151.00
13 Jun 2025794+7541.00
30 May 202540−4,2191.00
15 May 20254,259−9171.00
30 Apr 20255,176+2,8861.12
15 Apr 20252,290+1,6471.00
31 Mar 2025643−1,8321.00
14 Mar 20252,475+2,1041.00
28 Feb 2025371−9141.00
31 Jan 20251,285−2,2541.00
15 Jan 20253,539+2,4031.00
31 Dec 20241,136−2,2571.00
13 Dec 20243,393−3,7222.88
29 Nov 20247,115+7562.89
15 Nov 20246,359+6391.54
31 Oct 20245,720+3,9452.05
15 Oct 20241,775−1,8261.00
30 Sep 20243,601−14,7631.09
13 Sep 202418,364+3,7812.28
30 Aug 202414,583−28,5944.21
15 Aug 202443,177+14,9531.38
31 Jul 202428,224−37,7631.19
15 Jul 202465,987–1.00

Scroll inside the table for earlier settlements, back to 15 Jul 2024.

Questions

Frequently asked questions

What is CPSJ's short interest?
30,644 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 3,532 from the previous settlement.
Why is there no percentage for CPSJ?
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 CPSJ's days to cover?
16.83 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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