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HowShorted

ISTB short interest Nasdaq Global Market

iShares Core 1-5 Year USD Bond. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: no SEC filer maps to the symbol (funds, notes, preferreds, warrants and foreign listings).

Shares short
140,195
vs previous settlement
โˆ’460,986 (-76.7%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for ISTB: 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
213
14 Sep 2026
Highest in window
837,157
1 Jun 2026
Days with a balance
153
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for iShares Core 1-5 Year USD Bond 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 837K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026140,195โˆ’460,9861.00
31 Aug 2026601,181+442,0441.56
14 Aug 2026159,137+105,0781.00
31 Jul 202654,059โˆ’228,8301.00
15 Jul 2026282,889โˆ’267,2761.00
30 Jun 2026550,165+450,9721.35
15 Jun 202699,193โˆ’312,0691.00
29 May 2026411,262+367,8971.00
15 May 202643,365+24,5011.00
30 Apr 202618,864โˆ’69,7071.00
15 Apr 202688,571+47,8951.00
31 Mar 202640,676โˆ’26,6501.00
13 Mar 202667,326+28,9831.00
27 Feb 202638,343โˆ’71,8941.00
13 Feb 2026110,237โˆ’20,2241.00
30 Jan 2026130,461โˆ’79,7151.00
15 Jan 2026210,176+129,0171.00
31 Dec 202581,159+66,2861.00
15 Dec 202514,873โˆ’46,1941.00
28 Nov 202561,067โˆ’113,3771.00
14 Nov 2025174,444โˆ’31,0281.00
31 Oct 2025205,472+15,9931.00
15 Oct 2025189,479+143,8341.00
30 Sep 202545,645โˆ’45,6321.00
15 Sep 202591,277โˆ’276,0431.00
29 Aug 2025367,320+290,9121.00
15 Aug 202576,408โˆ’116,5731.00
31 Jul 2025192,981+84,1471.00
15 Jul 2025108,834+33,0731.00
30 Jun 202575,761โˆ’7,8691.00
13 Jun 202583,630+41,3771.00
30 May 202542,253โˆ’62,4331.00
15 May 2025104,686โˆ’24,6241.00
30 Apr 2025129,310โˆ’195,5361.00
15 Apr 2025324,846+136,9981.00
31 Mar 2025187,848+26,2411.00
14 Mar 2025161,607โˆ’11,3201.00
28 Feb 2025172,927โˆ’75,1941.00
14 Feb 2025248,121โˆ’6,7191.00
31 Jan 2025254,840โˆ’73,4921.00
15 Jan 2025328,332โˆ’683,3601.00
31 Dec 20241,011,692+689,2152.24
13 Dec 2024322,477+36,1331.00
29 Nov 2024286,344โˆ’58,6571.00
15 Nov 2024345,001โˆ’147,0041.00
31 Oct 2024492,005+53,4731.75
15 Oct 2024438,532+355,7991.50
30 Sep 202482,733โˆ’123,6831.00
13 Sep 2024206,416+148,1121.00
30 Aug 202458,304โˆ’26,7621.00
15 Aug 202485,066+17,4431.00
31 Jul 202467,623โˆ’65,2741.00
15 Jul 2024132,897+80,0751.00
28 Jun 202452,822โˆ’111,0761.00
14 Jun 2024163,898+49,6701.00
31 May 2024114,228+35,3861.00
15 May 202478,842+47,5331.00
30 Apr 202431,309+19,1781.00
15 Apr 202412,131โˆ’14,2911.00
28 Mar 202426,422โˆ’7,2511.00
15 Mar 202433,673โˆ’357,9251.00
29 Feb 2024391,598+383,4811.00
15 Feb 20248,117โˆ’33,9091.00
31 Jan 202442,026โˆ’25,5691.00
12 Jan 202467,595+61,3251.00
29 Dec 20236,270โˆ’286,6181.00
15 Dec 2023292,888+131,8101.00
30 Nov 2023161,078+92,5141.00
15 Nov 202368,564สณโˆ’33,7761.00
31 Oct 2023102,340โˆ’148,7981.00
13 Oct 2023251,138+227,0661.00
29 Sep 202324,072โˆ’746,5181.00
15 Sep 2023770,590+263,8922.09
31 Aug 2023506,698โˆ’63,3891.00
15 Aug 2023570,087โˆ’559,8951.71
31 Jul 20231,129,982+79,0062.54
14 Jul 20231,050,976+542,9272.01
30 Jun 2023508,049+340,5471.00
15 Jun 2023167,502โˆ’347,7921.00
31 May 2023515,294+6,7221.35
15 May 2023508,572+453,2051.00
28 Apr 202355,367โˆ’1,062,6661.00
14 Apr 20231,118,033+681,3991.13
31 Mar 2023436,634โˆ’1,502,6931.00
15 Mar 20231,939,327+1,697,7252.24
28 Feb 2023241,602โˆ’456,4721.00
15 Feb 2023698,074+12,7911.00
31 Jan 2023685,283+514,3561.00
13 Jan 2023170,927+3,0311.00
30 Dec 2022167,896โˆ’655,5021.00
15 Dec 2022823,398+344,1141.00
30 Nov 2022479,284โˆ’33,2851.00
15 Nov 2022512,569โˆ’72,4191.00
31 Oct 2022584,988+381,7671.00
14 Oct 2022203,221โˆ’563,0581.00
30 Sep 2022766,279+128,5221.00
15 Sep 2022637,757+402,1461.00
31 Aug 2022235,611โˆ’16,8931.00
15 Aug 2022252,504โˆ’932,9261.00
29 Jul 20221,185,430โˆ’332,7181.77
15 Jul 20221,518,148+1,353,2331.70
30 Jun 2022164,915โˆ’367,7311.00
15 Jun 2022532,646โˆ’236,6251.00
31 May 2022769,271โˆ’213,8261.00
13 May 2022983,097+281,5861.00
29 Apr 2022701,511โˆ’1,009,3771.00
14 Apr 20221,710,888+913,8551.38
31 Mar 2022797,033+616,4441.00
15 Mar 2022180,589โˆ’462,5131.00
28 Feb 2022643,102+432,4001.00
15 Feb 2022210,702+195,5751.00
31 Jan 202215,127โˆ’891,1831.00
14 Jan 2022906,310+799,2301.34
31 Dec 2021107,080โˆ’1,339,5461.00
15 Dec 20211,446,626+1,433,5441.93
30 Nov 202113,082โˆ’157,0681.00
15 Nov 2021170,150+143,6511.00
29 Oct 202126,499โˆ’4,1491.00
15 Oct 202130,648โˆ’123,5881.00
30 Sep 2021154,236+21,8541.00
15 Sep 2021132,382+115,9861.00
31 Aug 202116,396โˆ’692,5901.00
13 Aug 2021708,986+683,6351.23
30 Jul 202125,351โˆ’71,9751.00
15 Jul 202197,326+66,4171.00
30 Jun 202130,909โˆ’18,3511.00
15 Jun 202149,260โˆ’88,8181.00
28 May 2021138,078+25,2761.00
14 May 2021112,802+3,6301.00
30 Apr 2021109,172โˆ’170,1741.00
15 Apr 2021279,346+256,7121.00
31 Mar 202122,634โˆ’500,4731.00
15 Mar 2021523,107+86,4881.00
26 Feb 2021436,619โˆ’1,028,6911.00
12 Feb 20211,465,310+1,249,9371.73
29 Jan 2021215,373+200,9721.00
15 Jan 202114,401โˆ’17,8661.00
31 Dec 202032,267โˆ’1,099,1901.00
15 Dec 20201,131,457+940,4761.62
30 Nov 2020190,981+157,3631.00
13 Nov 202033,618โˆ’26,0041.00
30 Oct 202059,622+3,8731.00
15 Oct 202055,749+44,7291.00
30 Sep 202011,020โˆ’206,2031.00
15 Sep 2020217,223+62,4661.00
31 Aug 2020154,757+125,3171.00
14 Aug 202029,440+10,2791.00
31 Jul 202019,161โˆ’13,3251.00
15 Jul 202032,486โˆ’29,3451.00
30 Jun 202061,831โˆ’301,9141.00
15 Jun 2020363,745+306,9201.00
29 May 202056,825โˆ’193,0431.00
15 May 2020249,868โˆ’11,1201.00
30 Apr 2020260,988+225,4081.00
15 Apr 202035,580โˆ’82,7021.00
31 Mar 2020118,282+28,9321.00
13 Mar 202089,350+69,6131.00
28 Feb 202019,737โˆ’25,3741.00
14 Feb 202045,111+11,0601.00
31 Jan 202034,051+14,5591.00
15 Jan 202019,492โˆ’142,1341.00
31 Dec 2019161,626+107,1201.00
13 Dec 201954,506โˆ’392,9621.00
29 Nov 2019447,468+395,3561.00
15 Nov 201952,112+11,9131.00
31 Oct 201940,199+7601.00
15 Oct 201939,439โˆ’57,6051.00
30 Sep 201997,044+76,5531.00
13 Sep 201920,491โˆ’30,1731.00
30 Aug 201950,664+22,4321.00
15 Aug 201928,232โˆ’51,3111.00
31 Jul 201979,543+26,9641.00
15 Jul 201952,579+21,1981.00
28 Jun 201931,381โˆ’42,8041.00
14 Jun 201974,185+61,4871.00
31 May 201912,698โˆ’31,4651.00
15 May 201944,163โˆ’250,3061.00
30 Apr 2019294,469+230,5431.01
15 Apr 201963,926โˆ’678,2581.00
29 Mar 2019742,184+731,4262.76
15 Mar 201910,758โˆ’43,1201.00
28 Feb 201953,878โˆ’78,5751.00
15 Feb 2019132,453+40,2771.00
31 Jan 201992,176+50,5471.00
15 Jan 201941,629โˆ’760,0861.00
31 Dec 2018801,715+716,6421.27
14 Dec 201885,073โˆ’97,8071.00
30 Nov 2018182,880+79,1361.00
15 Nov 2018103,744+71,3781.00
31 Oct 201832,366โˆ’10,0781.00
15 Oct 201842,444โˆ’251,5461.00
28 Sep 2018293,990+261,2091.47
14 Sep 201832,781+19,0301.00
31 Aug 201813,751โˆ’166,0081.00
15 Aug 2018179,759โˆ’26,5441.02
31 Jul 2018206,303+139,1991.55
13 Jul 201867,104โˆ’88,8421.00
29 Jun 2018155,946+109,2381.00
15 Jun 201846,708+17,6531.00
31 May 201829,055โˆ’4,3381.00
15 May 201833,393โˆ’16,9441.00
30 Apr 201850,337+13,0941.00
13 Apr 201837,243+28,9301.00
29 Mar 20188,313โˆ’87,2301.00
15 Mar 201895,543+76,5581.00
28 Feb 201818,985โˆ’8,4871.00
15 Feb 201827,472โˆ’14,5761.00
31 Jan 201842,048+1,0851.00
12 Jan 201840,963โˆ’145,6181.00
29 Dec 2017186,581โ€“1.00

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

Questions

Frequently asked questions

What is ISTB's short interest?
140,195 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 460,986 from the previous settlement.
Why is there no percentage for ISTB?
Because no defensible share count exists to divide by: no SEC filer maps to the symbol (funds, notes, preferreds, warrants and foreign listings). No SEC filer maps to this symbol in EDGAR's ticker file. That is the normal case for funds, exchange-traded notes, preferred shares, warrants, units and foreign listings, none of which file a share count we could divide by.
What is ISTB'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.

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