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HowShorted

TAIL short interest Cboe BZX

Cambria Tail Risk ETF. 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
316,305
vs previous settlement
+277,662 (+718.5%)
days to cover
1.92
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for TAIL: 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
1,088
19 Aug 2026
Highest in window
863,702
2 Dec 2025
Days with a balance
106
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Cambria Tail Risk ETF 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 864K shares.

History

Every FINRA settlement we hold for TAIL, newest first. สณ marks a figure FINRA itself flagged as revised.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026316,305+277,6621.92
31 Aug 202638,643+16,9191.00
14 Aug 202621,724+6,2351.00
31 Jul 202615,489โˆ’408,6561.00
15 Jul 2026424,145+322,3911.95
30 Jun 2026101,754โˆ’282,6241.00
15 Jun 2026384,378+305,9801.40
29 May 202678,398โˆ’100,7401.00
15 May 2026179,138+91,3001.00
30 Apr 202687,838+83,4471.00
15 Apr 20264,391โˆ’332,7911.00
31 Mar 2026337,182+215,5951.00
13 Mar 2026121,587โˆ’165,8541.00
27 Feb 2026287,441โˆ’8,1181.00
13 Feb 2026295,559+111,3381.00
30 Jan 2026184,221โˆ’31,5441.00
15 Jan 2026215,765+211,6981.00
31 Dec 20254,067โˆ’46,5141.00
15 Dec 202550,581โˆ’71,0741.00
28 Nov 2025121,655โˆ’310,7241.00
14 Nov 2025432,379+119,5081.00
31 Oct 2025312,871+50,0511.04
15 Oct 2025262,820โˆ’36,9591.04
30 Sep 2025299,779+80,3171.77
15 Sep 2025219,462+206,6771.07
29 Aug 202512,785โˆ’16,7161.00
15 Aug 202529,501โˆ’10,0581.00
31 Jul 202539,559+2,9421.00
15 Jul 202536,617+2,8511.00
30 Jun 202533,766+22,1211.00
13 Jun 202511,645โˆ’4,9061.00
30 May 202516,551โˆ’7,3491.00
15 May 202523,900โˆ’65,2241.00
30 Apr 202589,124+78,3111.00
15 Apr 202510,813โˆ’21,6361.00
31 Mar 202532,449โˆ’15,0141.00
14 Mar 202547,463+37,5841.00
28 Feb 20259,879+6,8461.00
14 Feb 20253,033โˆ’1,0901.00
31 Jan 20254,123โˆ’28,9591.00
15 Jan 202533,082+6921.00
31 Dec 202432,390+1,3631.00
13 Dec 202431,027โˆ’44,8271.00
29 Nov 202475,854+30,6792.11
15 Nov 202445,175+20,0351.00
31 Oct 202425,140+20,3391.00
15 Oct 20244,801+1,4981.00
30 Sep 20243,303โˆ’29,2851.00
13 Sep 202432,588โˆ’30,4421.00
30 Aug 202463,030+47,8842.30
15 Aug 202415,146+13,6621.00
31 Jul 20241,484โˆ’12,5741.00
15 Jul 202414,058โˆ’7,1081.00
28 Jun 202421,166+20,0171.00
14 Jun 20241,149+2611.00
31 May 2024888โˆ’1,2151.00
15 May 20242,103โˆ’12,9861.00
30 Apr 202415,089โˆ’5,6131.00
15 Apr 202420,702+20,0421.00
28 Mar 2024660+491.00
15 Mar 2024611โˆ’3,6031.00
29 Feb 20244,214โˆ’4231.00
15 Feb 20244,637โˆ’5,2231.00
31 Jan 20249,860+5,1591.00
12 Jan 20244,701โˆ’4,9751.00
29 Dec 20239,676+3,4771.00
15 Dec 20236,199+91.00
30 Nov 20236,190+2641.00
15 Nov 20235,926+1,9311.00
31 Oct 20233,995+1,5311.00
13 Oct 20232,464โˆ’18,2651.00
29 Sep 202320,729+17,7951.00
15 Sep 20232,934+1,9001.00
31 Aug 20231,034โˆ’1,3501.00
15 Aug 20232,384โˆ’1,5391.00
31 Jul 20233,923โˆ’5,6771.00
14 Jul 20239,600+4,1741.00
30 Jun 20235,426โˆ’2,8391.00
15 Jun 20238,265+4,2901.00
31 May 20233,975โˆ’2,4201.00
15 May 20236,395โˆ’49,3011.00
28 Apr 202355,696+31,0511.00
14 Apr 202324,645+13,9091.00
31 Mar 202310,736โˆ’10,3071.00
15 Mar 202321,043โˆ’7,1411.00
28 Feb 202328,184+25,3771.00
15 Feb 20232,807โˆ’27,2981.00
31 Jan 202330,105+28,0101.00
13 Jan 20232,095+1,5311.00
30 Dec 2022564โˆ’2,3731.00
15 Dec 20222,937โˆ’9831.00
30 Nov 20223,920โˆ’4,3491.00
15 Nov 20228,269โˆ’1711.00
31 Oct 20228,440โˆ’29,4661.00
14 Oct 202237,906+15,2001.00
30 Sep 202222,706+14,7881.00
15 Sep 20227,918โˆ’10,8171.00
31 Aug 202218,735โˆ’32,9761.00
15 Aug 202251,711โˆ’14,0571.00
29 Jul 202265,768โˆ’18,9521.00
15 Jul 202284,720โˆ’64,3041.00
30 Jun 2022149,024+140,5541.00
15 Jun 20228,470โˆ’332,0191.00
31 May 2022340,489+317,0831.00
13 May 202223,406โˆ’37,8541.00
29 Apr 202261,260+20,7991.00
14 Apr 202240,461+15,2371.00
31 Mar 202225,224โˆ’60,8381.00
15 Mar 202286,062+84,2531.00
28 Feb 20221,809โˆ’92,1381.00
15 Feb 202293,947+68,3381.00
31 Jan 202225,609โˆ’29,2531.00
14 Jan 202254,862+52,0591.00
31 Dec 20212,803โˆ’69,8001.00
15 Dec 202172,603โˆ’22,0721.00
30 Nov 202194,675+32,4321.00
15 Nov 202162,243+28,3721.00
29 Oct 202133,871โˆ’5221.00
15 Oct 202134,393โˆ’46,1101.00
30 Sep 202180,503+32,9601.00
15 Sep 202147,543+36,7291.00
31 Aug 202110,814โˆ’2,8441.00
13 Aug 202113,658โˆ’7,0291.00
30 Jul 202120,687+2,7671.00
15 Jul 202117,920โˆ’11,9791.00
30 Jun 202129,899โˆ’6,1231.00
15 Jun 202136,022สณโˆ’20,6631.00
28 May 202156,685โˆ’59,0961.00
14 May 2021115,781+1,6881.00
30 Apr 2021114,093โˆ’70,7361.00
15 Apr 2021184,829+162,6481.00
31 Mar 202122,181+8,2611.00
15 Mar 202113,920โˆ’109,2301.00
26 Feb 2021123,150โˆ’186,9991.00
12 Feb 2021310,149+202,9361.13
29 Jan 2021107,213+59,4021.00
15 Jan 202147,811โˆ’105,4741.00
31 Dec 2020153,285+92,2901.00
15 Dec 202060,995+8,3761.00
30 Nov 202052,619โˆ’6511.00
13 Nov 202053,270โˆ’9,9171.00
30 Oct 202063,187+20,7221.00
15 Oct 202042,465โˆ’49,6301.00
30 Sep 202092,095+8,7051.00
15 Sep 202083,390+44,0331.00
31 Aug 202039,357+17,5941.00
14 Aug 202021,763โˆ’37,4201.00
31 Jul 202059,183โˆ’10,1661.00
15 Jul 202069,349โˆ’7,7171.00
30 Jun 202077,066โˆ’229,1451.00
15 Jun 2020306,211+264,0431.00
29 May 202042,168โˆ’30,7221.00
15 May 202072,890+36,8271.00
30 Apr 202036,063โˆ’54,7541.00
15 Apr 202090,817+6,5121.00
31 Mar 202084,305โˆ’189,7551.00
13 Mar 2020274,060+244,5051.00
28 Feb 202029,555โˆ’21,9461.00
14 Feb 202051,501+28,4502.01
31 Jan 202023,051+15,5421.00
15 Jan 20207,509โˆ’1401.00
31 Dec 20197,649โˆ’19,9741.00
13 Dec 201927,623โˆ’5,5491.00
29 Nov 201933,172โˆ’18,7141.88
15 Nov 201951,886+23,7841.89
31 Oct 201928,102+19,3651.02
15 Oct 20198,737+2,5831.00
30 Sep 20196,154โˆ’10,6081.00
13 Sep 201916,762โˆ’14,0961.00
30 Aug 201930,858+27,4031.00
15 Aug 20193,455โˆ’1,0241.00
31 Jul 20194,479+2,5611.00
15 Jul 20191,918โˆ’2,0101.00
28 Jun 20193,928โˆ’2,2561.00
14 Jun 20196,184โˆ’29,9181.00
31 May 201936,102+3,8591.00
15 May 201932,243+8,5591.46
30 Apr 201923,684+12,6982.33
15 Apr 201910,986+2,9941.00
29 Mar 20197,992+6,0721.00
15 Mar 20191,920โˆ’1,1841.00
28 Feb 20193,104โˆ’3,2671.00
15 Feb 20196,371+6,3231.00
31 Jan 201948โˆ’7591.00
15 Jan 2019807โˆ’29,9591.00
31 Dec 201830,766โˆ’2,2431.00
14 Dec 201833,009+20,6272.34
30 Nov 201812,382+6,5061.86
15 Nov 20185,876โˆ’8,7851.00
31 Oct 201814,661+1,8961.00
15 Oct 201812,765โˆ’1,4971.00
28 Sep 201814,262โˆ’9,8121.51
14 Sep 201824,074+17,5452.10
31 Aug 20186,529+4,9651.00
15 Aug 20181,564+1,2521.00
31 Jul 2018312โˆ’5,4401.00
13 Jul 20185,752+5,1891.00
29 Jun 2018563โˆ’2,2291.00
15 Jun 20182,792+1,9171.00
31 May 2018875โˆ’4,1041.00
15 May 20184,979โˆ’12,4321.00
30 Apr 201817,411+1,8603.45
13 Apr 201815,551โˆ’14,3761.00
29 Mar 201829,927+24,3981.46
15 Mar 20185,529โˆ’16,7431.00
28 Feb 201822,272+21,9841.53
15 Feb 2018288โˆ’9,0891.00
31 Jan 20189,377+2861.00
12 Jan 20189,091+7,9391.00
29 Dec 20171,152โ€“1.00

Scroll inside the table for earlier settlements, back to 29 Dec 2017.

Questions

Frequently asked questions

What is TAIL's short interest?
316,305 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 277,662 from the previous settlement.
Why is there no percentage for TAIL?
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 TAIL's days to cover?
1.92 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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