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HowShorted

IUSB short interest Nasdaq Global Market

iShares Trust iShares Core Uni. 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
1,482,195
vs previous settlement
โˆ’3,715,099 (-71.5%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for IUSB: 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
50
14 Sep 2026
Highest in window
928,661
6 Mar 2026
Days with a balance
146
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for iShares Trust iShares Core Uni 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 929K shares.

History

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

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20261,482,195โˆ’3,715,0991.00
31 Aug 20265,197,294โˆ’274,9041.62
14 Aug 20265,472,198+445,8341.70
31 Jul 20265,026,364+637,9871.51
15 Jul 20264,388,377+446,8011.36
30 Jun 20263,941,576+800,4561.09
15 Jun 20263,141,120โˆ’35,274,4511.00
29 May 202638,415,571+35,421,9152.02
15 May 20262,993,656โˆ’1,997,2731.02
30 Apr 20264,990,929+1,908,0271.80
15 Apr 20263,082,902+991,6141.19
31 Mar 20262,091,288โˆ’6,055,6881.00
13 Mar 20268,146,976+1,444,8731.77
27 Feb 20266,702,103+372,1483.12
13 Feb 20266,329,955+3,382,0961.94
30 Jan 20262,947,859โˆ’1,403,7291.01
15 Jan 20264,351,588+3,176,4711.18
31 Dec 20251,175,117โˆ’1,744,3651.00
15 Dec 20252,919,482+2,314,9061.04
28 Nov 2025604,576โˆ’6,578,9701.00
14 Nov 20257,183,546+5,613,7432.37
31 Oct 20251,569,803+874,7251.00
15 Oct 2025695,078โˆ’95,8491.00
30 Sep 2025790,927โˆ’1,632,5951.00
15 Sep 20252,423,522+890,5261.00
29 Aug 20251,532,996+916,7611.00
15 Aug 2025616,235โˆ’2,991,8421.00
31 Jul 20253,608,077+939,1531.69
15 Jul 20252,668,924+1,490,9491.00
30 Jun 20251,177,975+9,8321.00
13 Jun 20251,168,143+420,5001.00
30 May 2025747,643โˆ’1,835,5671.00
15 May 20252,583,210+1,360,5441.33
30 Apr 20251,222,666+689,6631.00
15 Apr 2025533,003โˆ’1,467,7621.00
31 Mar 20252,000,765+623,1831.00
14 Mar 20251,377,582โˆ’4,386,2021.00
28 Feb 20255,763,784+1,758,8421.64
14 Feb 20254,004,942+3,441,3701.66
31 Jan 2025563,572โˆ’690,5861.00
15 Jan 20251,254,158โˆ’5,877,3661.00
31 Dec 20247,131,524+3,611,2452.13
13 Dec 20243,520,279+2,597,8591.50
29 Nov 2024922,420+555,2261.00
15 Nov 2024367,194โˆ’3,653,6021.00
31 Oct 20244,020,796โˆ’1,180,4951.31
15 Oct 20245,201,291+2,448,4291.77
30 Sep 20242,752,862+1,181,1091.17
13 Sep 20241,571,753โˆ’256,7351.00
30 Aug 20241,828,488โˆ’64,0091.06
15 Aug 20241,892,497+450,4601.00
31 Jul 20241,442,037โˆ’111,5381.00
15 Jul 20241,553,575+1,091,6001.00
28 Jun 2024461,975โˆ’86,1681.00
14 Jun 2024548,143โˆ’1,292,3571.00
31 May 20241,840,500+349,7601.31
15 May 20241,490,740+996,1651.00
30 Apr 2024494,575+290,4111.00
15 Apr 2024204,164โˆ’610,6991.00
28 Mar 2024814,863โˆ’734,1761.00
15 Mar 20241,549,039+979,5761.00
29 Feb 2024569,463โˆ’633,7141.00
15 Feb 20241,203,177โˆ’2,542,8251.00
31 Jan 20243,746,002+3,535,5741.00
12 Jan 2024210,428โˆ’295,9941.00
29 Dec 2023506,422โˆ’225,5871.00
15 Dec 2023732,009+343,1761.00
30 Nov 2023388,833โˆ’193,6551.00
15 Nov 2023582,488+430,3331.00
31 Oct 2023152,155โˆ’148,5131.00
13 Oct 2023300,668+10,1881.00
29 Sep 2023290,480โˆ’134,6981.00
15 Sep 2023425,178โˆ’240,9081.00
31 Aug 2023666,086โˆ’168,2861.00
15 Aug 2023834,372+98,6181.00
31 Jul 2023735,754โˆ’60,5391.00
14 Jul 2023796,293+95,4671.00
30 Jun 2023700,826โˆ’11,8051.00
15 Jun 2023712,631+139,9491.00
31 May 2023572,682โˆ’549,4291.00
15 May 20231,122,111+204,7441.00
28 Apr 2023917,367+316,4301.00
14 Apr 2023600,937+77,7821.00
31 Mar 2023523,155+26,3101.00
15 Mar 2023496,845+63,0521.00
28 Feb 2023433,793โˆ’678,2251.00
15 Feb 20231,112,018+184,3531.00
31 Jan 2023927,665+591,7841.00
13 Jan 2023335,881โˆ’316,2341.00
30 Dec 2022652,115โˆ’3,5571.00
15 Dec 2022655,672+257,7881.00
30 Nov 2022397,884โˆ’307,4551.00
15 Nov 2022705,339โˆ’1,361,1391.00
31 Oct 20222,066,478+494,8741.00
14 Oct 20221,571,604+661,2811.00
30 Sep 2022910,323+493,1041.00
15 Sep 2022417,219โˆ’384,7791.00
31 Aug 2022801,998โˆ’1,119,7431.00
15 Aug 20221,921,741+1,165,4961.06
29 Jul 2022756,245+508,6821.00
15 Jul 2022247,563โˆ’1,042,7541.00
30 Jun 20221,290,317โˆ’1,298,1401.00
15 Jun 20222,588,457+1,049,3961.00
31 May 20221,539,061โˆ’847,3151.00
13 May 20222,386,376+1,741,8221.11
29 Apr 2022644,554+135,9851.00
14 Apr 2022508,569โˆ’234,6561.00
31 Mar 2022743,225+442,3101.00
15 Mar 2022300,915โˆ’204,6701.00
28 Feb 2022505,585โˆ’292,8641.00
15 Feb 2022798,449โˆ’1,064,0131.00
31 Jan 20221,862,462โˆ’153,4681.00
14 Jan 20222,015,930+1,787,5431.14
31 Dec 2021228,387โˆ’293,6891.00
15 Dec 2021522,076โˆ’28,9551.00
30 Nov 2021551,031โˆ’36,5921.00
15 Nov 2021587,623+198,8701.00
29 Oct 2021388,753โˆ’568,8861.00
15 Oct 2021957,639โˆ’34,0741.00
30 Sep 2021991,713โˆ’724,8821.22
15 Sep 20211,716,595+1,272,4262.18
31 Aug 2021444,169โˆ’42,2111.00
13 Aug 2021486,380โˆ’88,3961.00
30 Jul 2021574,776โˆ’121,7631.00
15 Jul 2021696,539โˆ’654,7061.00
30 Jun 20211,351,245+1,037,9761.52
15 Jun 2021313,269สณโˆ’53,1641.00
28 May 2021366,433+137,4061.00
14 May 2021229,027โˆ’1,003,4831.00
30 Apr 20211,232,510+888,8771.45
15 Apr 2021343,633โˆ’373,4821.00
31 Mar 2021717,115+516,1851.00
15 Mar 2021200,930โˆ’4,465,6101.00
26 Feb 20214,666,540+993,5172.25
12 Feb 20213,673,023โˆ’951,7653.38
29 Jan 20214,624,788+4,373,0532.56
15 Jan 2021251,735โˆ’81,9221.00
31 Dec 2020333,657+98,7881.00
15 Dec 2020234,869+35,7711.00
30 Nov 2020199,098+20,6341.00
13 Nov 2020178,464โˆ’817,6401.00
30 Oct 2020996,104+74,3292.72
15 Oct 2020921,775โˆ’82,4272.68
30 Sep 20201,004,202+60,8063.03
15 Sep 2020943,396+770,7842.15
31 Aug 2020172,612+87,5131.00
14 Aug 202085,099โˆ’147,4211.00
31 Jul 2020232,520โˆ’345,9291.00
15 Jul 2020578,449โˆ’356,2591.50
30 Jun 2020934,708โˆ’273,4362.23
15 Jun 20201,208,144+281,7751.82
29 May 2020926,369+567,9473.40
15 May 2020358,422โˆ’1,328,6471.00
30 Apr 20201,687,069+480,6474.79
15 Apr 20201,206,422+913,0222.04
31 Mar 2020293,400โˆ’903,7481.00
13 Mar 20201,197,148+1,116,3711.00
28 Feb 202080,777โˆ’285,0781.00
14 Feb 2020365,855โˆ’501,3971.52
31 Jan 2020867,252+633,3333.63
15 Jan 2020233,919โˆ’617,1871.00
31 Dec 2019851,106+530,7843.18
13 Dec 2019320,322โˆ’624,0071.54
29 Nov 2019944,329+300,8083.79
15 Nov 2019643,521โˆ’519,8481.83
31 Oct 20191,163,369+760,0913.38
15 Oct 2019403,278+153,3741.57
30 Sep 2019249,904+198,4821.37
13 Sep 201951,422โˆ’213,4391.00
30 Aug 2019264,861+9,5291.00
15 Aug 2019255,332+188,8381.14
31 Jul 201966,494โˆ’24,6541.00
15 Jul 201991,148โˆ’49,3011.00
28 Jun 2019140,449โˆ’227,2771.00
14 Jun 2019367,726+155,8211.26
31 May 2019211,905+96,3071.37
15 May 2019115,598โˆ’548,7491.00
30 Apr 2019664,347+359,8822.13
15 Apr 2019304,465โˆ’39,8021.53
29 Mar 2019344,267+310,8511.00
15 Mar 201933,416โˆ’497,3231.00
28 Feb 2019530,739โˆ’800,1653.46
15 Feb 20191,330,904+364,5405.57
31 Jan 2019966,364โˆ’1,967,7143.94
15 Jan 20192,934,078+335,2309.90
31 Dec 20182,598,848+363,4273.98
14 Dec 20182,235,421+817,7326.25
30 Nov 20181,417,689+1,052,7028.16
15 Nov 2018364,987+240,0941.10
31 Oct 2018124,893+86,6211.00
15 Oct 201838,272+11,5531.00
28 Sep 201826,719โˆ’109,8641.00
14 Sep 2018136,583+21,1661.36
31 Aug 2018115,417โˆ’774,4691.19
15 Aug 2018889,886+498,5198.76
31 Jul 2018391,367+228,3823.82
13 Jul 2018162,985+77,6551.92
29 Jun 201885,330โˆ’50,6481.30
15 Jun 2018135,978โˆ’95,2341.12
31 May 2018231,212+72,2881.34
15 May 2018158,924โˆ’218,7531.28
30 Apr 2018377,677+326,3372.53
13 Apr 201851,340โˆ’211,7331.00
29 Mar 2018263,073โˆ’61,1662.86
15 Mar 2018324,239+194,6473.06
28 Feb 2018129,592+95,9621.00
15 Feb 201833,630โˆ’50,1451.00
31 Jan 201883,775โˆ’10,0931.00
12 Jan 201893,868+65,0111.00
29 Dec 201728,857โ€“1.00

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

Questions

Frequently asked questions

What is IUSB's short interest?
1,482,195 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 3,715,099 from the previous settlement.
Why is there no percentage for IUSB?
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 IUSB'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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