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HowShorted

SUB short interest NYSE Arca

iShares Short-Term National Mu. 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
217,276
vs previous settlement
+94,382 (+76.8%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for SUB: 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
9
14 Sep 2026
Highest in window
206,425
2 Jan 2026
Days with a balance
118
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for iShares Short-Term National Mu 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 206K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026217,276+94,3821.00
31 Aug 2026122,894โˆ’92,5241.00
14 Aug 2026215,418+110,0551.00
31 Jul 2026105,363+74,2961.00
15 Jul 202631,067โˆ’19,6081.00
30 Jun 202650,675โˆ’39,7881.00
15 Jun 202690,463+4,0461.00
29 May 202686,417โˆ’49,4191.00
15 May 2026135,836โˆ’182,1181.00
30 Apr 2026317,954+223,0811.00
15 Apr 202694,873โˆ’166,2131.00
31 Mar 2026261,086โˆ’2,6461.00
13 Mar 2026263,732+116,7001.00
27 Feb 2026147,032โˆ’193,0381.00
13 Feb 2026340,070+161,4981.00
30 Jan 2026178,572โˆ’2,008,7741.00
15 Jan 20262,187,346+1,899,8522.27
31 Dec 2025287,494โˆ’46,6501.00
15 Dec 2025334,144+48,3001.00
28 Nov 2025285,844โˆ’134,9911.00
14 Nov 2025420,835+351,9161.09
31 Oct 202568,919โˆ’207,0861.00
15 Oct 2025276,005+195,5161.00
30 Sep 202580,489+13,3891.00
15 Sep 202567,100โˆ’35,1911.00
29 Aug 2025102,291โˆ’3,4331.00
15 Aug 2025105,724โˆ’22,6421.00
31 Jul 2025128,366+33,6301.00
15 Jul 202594,736โˆ’31,3661.00
30 Jun 2025126,102+37,1541.00
13 Jun 202588,948+59,7131.00
30 May 202529,235โˆ’226,4831.00
15 May 2025255,718+96,9501.00
30 Apr 2025158,768โˆ’324,0061.00
15 Apr 2025482,774+375,5311.00
31 Mar 2025107,243+59,5531.00
14 Mar 202547,690+39,0971.00
28 Feb 20258,593โˆ’141,6831.00
14 Feb 2025150,276โˆ’1,011,9381.00
31 Jan 20251,162,214+632,0702.35
15 Jan 2025530,144+125,0301.00
31 Dec 2024405,114+328,0551.00
13 Dec 202477,059โˆ’58,5421.00
29 Nov 2024135,601+102,0891.00
15 Nov 202433,512โˆ’24,7771.00
31 Oct 202458,289โˆ’74,8271.00
15 Oct 2024133,116โˆ’282,9701.00
30 Sep 2024416,086+374,2101.11
13 Sep 202441,876โˆ’109,8231.00
30 Aug 2024151,699+34,1891.00
15 Aug 2024117,510+87,3121.00
31 Jul 202430,198โˆ’5,0581.00
15 Jul 202435,256+2,4701.00
28 Jun 202432,786โˆ’22,9781.00
14 Jun 202455,764โˆ’6,0651.00
31 May 202461,829โˆ’238,9331.00
15 May 2024300,762+15,1111.00
30 Apr 2024285,651+236,9111.00
15 Apr 202448,740โˆ’24,8111.00
28 Mar 202473,551+59,8381.00
15 Mar 202413,713โˆ’50,3481.00
29 Feb 202464,061โˆ’220,4801.00
15 Feb 2024284,541+259,7481.00
31 Jan 202424,793โˆ’114,8911.00
12 Jan 2024139,684โˆ’40,1011.00
29 Dec 2023179,785โˆ’459,5601.00
15 Dec 2023639,345+598,2691.06
30 Nov 202341,076โˆ’9,0831.00
15 Nov 202350,159โˆ’469,5021.00
31 Oct 2023519,661+308,8501.00
13 Oct 2023210,811+135,4301.00
29 Sep 202375,381โˆ’273,5751.00
15 Sep 2023348,956โˆ’1,672,6471.00
31 Aug 20232,021,603+1,542,8213.34
15 Aug 2023478,782โˆ’3,029,3541.00
31 Jul 20233,508,136+1,696,9856.90
14 Jul 20231,811,151+28,4272.99
30 Jun 20231,782,724+1,041,7633.41
15 Jun 2023740,961+677,3011.27
31 May 202363,660โˆ’9,1611.00
15 May 202372,821โˆ’155,5861.00
28 Apr 2023228,407+196,3841.00
14 Apr 202332,023โˆ’16,2111.00
31 Mar 202348,234โˆ’34,7911.00
15 Mar 202383,025+15,3361.00
28 Feb 202367,689+4691.00
15 Feb 202367,220+62,2691.00
31 Jan 20234,951โˆ’17,9781.00
13 Jan 202322,929โˆ’620,1831.00
30 Dec 2022643,112+521,4421.00
15 Dec 2022121,670โˆ’426,3901.00
30 Nov 2022548,060โˆ’171,3651.00
15 Nov 2022719,425+260,0271.00
31 Oct 2022459,398+309,4971.00
14 Oct 2022149,901โˆ’27,4551.00
30 Sep 2022177,356โˆ’134,9661.00
15 Sep 2022312,322โˆ’511,5761.00
31 Aug 2022823,898+754,9761.00
15 Aug 202268,922+13,3581.00
29 Jul 202255,564โˆ’13,4771.00
15 Jul 202269,041โˆ’114,4301.00
30 Jun 2022183,471โˆ’116,9261.00
15 Jun 2022300,397+56,1481.00
31 May 2022244,249+107,3621.00
13 May 2022136,887โˆ’14,4741.00
29 Apr 2022151,361+96,0501.00
14 Apr 202255,311โˆ’97,7761.00
31 Mar 2022153,087+74,0061.00
15 Mar 202279,081โˆ’162,1181.00
28 Feb 2022241,199โˆ’138,0171.00
15 Feb 2022379,216+248,5031.00
31 Jan 2022130,713โˆ’47,1981.00
14 Jan 2022177,911โˆ’33,6511.00
31 Dec 2021211,562+180,4861.00
15 Dec 202131,076โˆ’123,6441.00
30 Nov 2021154,720โˆ’21,4431.00
15 Nov 2021176,163+171,7711.00
29 Oct 20214,392โˆ’18,6171.00
15 Oct 202123,009โˆ’42,9551.00
30 Sep 202165,964+9,4181.00
15 Sep 202156,546โˆ’22,5211.00
31 Aug 202179,067+18,4151.00
13 Aug 202160,652โˆ’352,8511.00
30 Jul 2021413,503+262,3951.00
15 Jul 2021151,108โˆ’142,3751.00
30 Jun 2021293,483โˆ’5891.16
15 Jun 2021294,072สณ+279,1311.00
28 May 202114,941โˆ’55,6151.00
14 May 202170,556โˆ’71,4171.00
30 Apr 2021141,973+106,2401.00
15 Apr 202135,733โˆ’155,4621.00
31 Mar 2021191,195+172,3791.00
15 Mar 202118,816โˆ’378,3891.00
26 Feb 2021397,205+309,7101.49
12 Feb 202187,495โˆ’41,4811.00
29 Jan 2021128,976+76,2281.00
15 Jan 202152,748โˆ’78,3561.00
31 Dec 2020131,104+67,4161.00
15 Dec 202063,688โˆ’79,1991.00
30 Nov 2020142,887+53,8001.00
13 Nov 202089,087โˆ’17,6221.00
30 Oct 2020106,709โˆ’26,8351.00
15 Oct 2020133,544โˆ’13,8851.00
30 Sep 2020147,429โˆ’11,7311.07
15 Sep 2020159,160โˆ’5,4941.00
31 Aug 2020164,654โˆ’10,1631.00
14 Aug 2020174,817โˆ’295,8291.00
31 Jul 2020470,646+370,4362.65
15 Jul 2020100,210+3,1921.00
30 Jun 202097,018+10,4531.00
15 Jun 202086,565โˆ’58,7921.00
29 May 2020145,357โˆ’6,3541.04
15 May 2020151,711โˆ’5,6071.00
30 Apr 2020157,318+117,7511.00
15 Apr 202039,567โˆ’36,3011.00
31 Mar 202075,868+72,0131.00
13 Mar 20203,855โˆ’84,0931.00
28 Feb 202087,948โˆ’12,1501.00
14 Feb 2020100,098+46,1301.00
31 Jan 202053,968+36,9851.00
15 Jan 202016,983โˆ’19,4781.00
31 Dec 201936,461โˆ’7,2831.00
13 Dec 201943,744+11,7111.00
29 Nov 201932,033+9,3201.00
15 Nov 201922,713โˆ’32,8561.00
31 Oct 201955,569+1,6741.00
15 Oct 201953,895+12,7221.00
30 Sep 201941,173โˆ’72,4671.00
13 Sep 2019113,640+82,2271.00
30 Aug 201931,413+13,6701.00
15 Aug 201917,743โˆ’40,7411.00
31 Jul 201958,484+32,7341.00
15 Jul 201925,750+8,1861.00
28 Jun 201917,564โˆ’15,0921.00
14 Jun 201932,656โˆ’68,9671.00
31 May 2019101,623+59,4791.00
15 May 201942,144โˆ’27,9781.00
30 Apr 201970,122+56,7231.00
15 Apr 201913,399โˆ’901.00
29 Mar 201913,489โˆ’5,0511.00
15 Mar 201918,540+16,4471.00
28 Feb 20192,093+9131.00
15 Feb 20191,180โˆ’183,5711.00
31 Jan 2019184,751+81,0031.00
15 Jan 2019103,748+39,8521.00
31 Dec 201863,896+21,6361.00
14 Dec 201842,260โˆ’50,3441.00
30 Nov 201892,604+59,0381.00
15 Nov 201833,566+11,7051.00
31 Oct 201821,861โˆ’82,7971.00
15 Oct 2018104,658+59,9231.00
28 Sep 201844,735+19,9861.00
14 Sep 201824,749+5,9951.00
31 Aug 201818,754โˆ’54,7361.00
15 Aug 201873,490+50,2951.00
31 Jul 201823,195โˆ’72,2231.00
13 Jul 201895,418+63,4981.50
29 Jun 201831,920+10,8421.00
15 Jun 201821,078+5,2621.00
31 May 201815,816โˆ’43,3451.00
15 May 201859,161+26,2621.00
30 Apr 201832,899โˆ’41,3711.00
13 Apr 201874,270+45,1821.00
29 Mar 201829,088+8,7221.00
15 Mar 201820,366+14,4381.00
28 Feb 20185,928โˆ’16,1021.00
15 Feb 201822,030โˆ’35,8511.00
31 Jan 201857,881+23,1831.00
12 Jan 201834,698+13,9471.00
29 Dec 201720,751โ€“1.00

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

Questions

Frequently asked questions

What is SUB's short interest?
217,276 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 94,382 from the previous settlement.
Why is there no percentage for SUB?
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 SUB's days to cover?
1.00 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.

Ranked companies with a percentage: most shorted US stocks. Other funds by shares short and days to cover: most shorted ETFs. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.