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HowShorted

MUC short interest NYSE

BLACKROCK MUNIHOLDINGS CALIFOR. FINRA's reported shares short for this symbol, twice a month by settlement date, shown as the regulator publishes them. No percentage is shown: an SEC filer exists but no defensible share count is available yet.

Shares short
262,097
vs previous settlement
+137,451 (+110.3%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for MUC: 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
1,105
14 Sep 2026
Highest in window
59,016
7 Oct 2025
Days with a balance
107
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for BLACKROCK MUNIHOLDINGS CALIFOR 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 59K shares.

History

Every FINRA settlement we hold for MUC, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026262,097+137,4511.00
31 Aug 2026124,646+75,7501.00
14 Aug 202648,896+17,4091.00
31 Jul 202631,487−134,6891.00
15 Jul 2026166,176+111,2361.00
30 Jun 202654,940+17,9491.00
15 Jun 202636,991−8,9431.00
29 May 202645,934−36,6121.00
15 May 202682,546+14,2581.00
30 Apr 202668,288+9,0651.00
15 Apr 202659,223−21,1561.00
31 Mar 202680,379+20,0361.00
13 Mar 202660,343−27,4251.00
27 Feb 202687,768−16,7851.00
13 Feb 2026104,553−631,9181.00
30 Jan 2026736,471+557,2582.46
15 Jan 2026179,213−23,5001.00
31 Dec 2025202,713+162,4921.00
15 Dec 202540,221−37,6341.00
28 Nov 202577,855−32,9671.00
14 Nov 2025110,822+36,0271.00
31 Oct 202574,795+17,5921.00
15 Oct 202557,203−28,3311.00
30 Sep 202585,534+21,1481.00
15 Sep 202564,386+11,9211.00
29 Aug 202552,465−1,1601.00
15 Aug 202553,625−7,4511.00
31 Jul 202561,076+6,6541.00
15 Jul 202554,422+2,9021.00
30 Jun 202551,520+25,2391.00
13 Jun 202526,281−71,8431.00
30 May 202598,124−29,7901.00
15 May 2025127,914+30,7661.00
30 Apr 202597,148−31,8631.00
15 Apr 2025129,011+89,3901.00
31 Mar 202539,621−42,3891.00
14 Mar 202582,010+65,4941.00
28 Feb 202516,516−57,8571.00
14 Feb 202574,373+14,6151.00
31 Jan 202559,758+24,9191.00
15 Jan 202534,839+32,9341.00
31 Dec 20241,905−58,9931.00
13 Dec 202460,898+29,2451.00
29 Nov 202431,653+14,4081.00
15 Nov 202417,245−57,4741.00
31 Oct 202474,719+40,9461.00
15 Oct 202433,773−36,6641.00
30 Sep 202470,437+38,0341.00
13 Sep 202432,403+11,8711.00
30 Aug 202420,532+5,2931.00
15 Aug 202415,239+12,9921.00
31 Jul 20242,247−139,3211.00
15 Jul 2024141,568+117,5091.00
28 Jun 202424,059−10,2401.00
14 Jun 202434,299+5,9271.00
31 May 202428,372−10,6381.00
15 May 202439,010+12,0451.00
30 Apr 202426,965−10,1631.00
15 Apr 202437,128+8,4471.00
28 Mar 202428,681−24,8541.00
15 Mar 202453,535−28,7811.00
29 Feb 202482,316−54,3861.00
15 Feb 2024136,702−99,0991.00
31 Jan 2024235,801+44,6491.00
12 Jan 2024191,152+41,4011.00
29 Dec 2023149,751+66,4271.00
15 Dec 202383,324−10,9861.00
30 Nov 202394,310+63,1121.00
15 Nov 202331,198−202,1211.00
31 Oct 2023233,319+90,1221.00
13 Oct 2023143,197−107,1051.00
29 Sep 2023250,302+132,3651.00
15 Sep 2023117,937+97,2561.00
31 Aug 202320,681+15,3641.00
15 Aug 20235,317−42,0291.00
31 Jul 202347,346−54,6611.00
14 Jul 2023102,007−7,7401.00
30 Jun 2023109,747+11,3461.00
15 Jun 202398,401+87,8091.00
31 May 202310,592−13,8771.00
15 May 202324,469−3,8271.00
28 Apr 202328,296+4,6971.00
14 Apr 202323,599−23,7221.00
31 Mar 202347,321+1,3001.00
15 Mar 202346,021+35,3071.00
28 Feb 202310,714−10,1381.00
15 Feb 202320,852−75,0151.00
31 Jan 202395,867+75,4201.00
13 Jan 202320,447+13,9531.00
30 Dec 20226,494−3,2171.00
15 Dec 20229,711−15,3391.00
30 Nov 202225,050−6,7591.00
15 Nov 202231,809+26,0541.00
31 Oct 20225,755−7,4391.00
14 Oct 202213,194−17,4611.00
30 Sep 202230,655−4,2041.00
15 Sep 202234,859−33,5191.00
31 Aug 202268,378+21,8021.00
15 Aug 202246,576−7,1091.00
29 Jul 202253,685+21,0591.00
15 Jul 202232,626+9,6891.00
30 Jun 202222,937−102,3831.00
15 Jun 2022125,320+105,3521.00
31 May 202219,968−35,4171.00
13 May 202255,385+29,8801.00
29 Apr 202225,505+9,5541.00
14 Apr 202215,951−184,3181.00
31 Mar 2022200,269+103,9392.16
15 Mar 202296,330+28,1001.10
28 Feb 202268,230+5,9131.00
15 Feb 202262,317−4,7631.00
31 Jan 202267,080+3211.00
14 Jan 202266,759−14,8761.06
31 Dec 202181,635+5,6011.00
15 Dec 202176,034−47,4451.46
30 Nov 2021123,479−21,3041.99
15 Nov 2021144,783+110,2592.31
29 Oct 202134,524+9,2651.00
15 Oct 202125,259−2,5701.00
30 Sep 202127,829+20,2901.00
15 Sep 20217,539−26,8361.00
31 Aug 202134,375−2,6561.00
13 Aug 202137,031−9,5021.00
30 Jul 202146,533+3,9691.05
15 Jul 202142,564+7,0111.00
30 Jun 202135,553−40,9281.00
15 Jun 202176,481−8041.00
28 May 202177,285+46,9611.45
14 May 202130,324+12,8611.00
30 Apr 202117,463+13,5111.00
15 Apr 20213,952−67,9661.00
31 Mar 202171,918+1,5301.23
15 Mar 202170,388+55,0691.00
26 Feb 202115,319−5,1061.00
12 Feb 202120,425−6,9421.00
29 Jan 202127,367+19,0681.00
15 Jan 20218,299−39,3821.00
31 Dec 202047,681−5,7401.00
15 Dec 202053,421+1,5741.00
30 Nov 202051,847+37,3741.00
13 Nov 202014,473−8,0361.00
30 Oct 202022,509−3,6071.00
15 Oct 202026,116+9,2301.00
30 Sep 202016,886−1,5521.00
15 Sep 202018,438−7311.00
31 Aug 202019,169−34,7401.00
14 Aug 202053,909+1,4421.00
31 Jul 202052,467+44,7391.00
15 Jul 20207,728−91,0501.00
30 Jun 202098,778−9,3431.59
15 Jun 2020108,121+63,9601.46
29 May 202044,161+31,4211.00
15 May 202012,740+10,1471.00
30 Apr 20202,593−12,9261.00
15 Apr 202015,519−58,9211.00
31 Mar 202074,440+27,4711.00
13 Mar 202046,969+44,0251.00
28 Feb 20202,944−17,1341.00
14 Feb 202020,078−17,6351.00
31 Jan 202037,713−3,6241.00
15 Jan 202041,337+32,9201.00
31 Dec 20198,417+1,6421.00
13 Dec 20196,775−18,6401.00
29 Nov 201925,415+17,3751.00
15 Nov 20198,040−36,4571.00
31 Oct 201944,497+26,2511.00
15 Oct 201918,246−3581.00
30 Sep 201918,604−8,2721.00
13 Sep 201926,876−11,2811.00
30 Aug 201938,157−38,4301.00
15 Aug 201976,587+43,8261.00
31 Jul 201932,761+23,6271.00
15 Jul 20199,134−27,6131.00
28 Jun 201936,747+6,8411.00
14 Jun 201929,906+7,4741.00
31 May 201922,432+5081.00
15 May 201921,924−5,8271.00
30 Apr 201927,751+9281.00
15 Apr 201926,823+1621.00
29 Mar 201926,661−9,2971.00
15 Mar 201935,958+16,1601.00
28 Feb 201919,798+6,1561.00
15 Feb 201913,642−9,3301.00
31 Jan 201922,972+6,2291.00
15 Jan 201916,743+10,9241.00
31 Dec 20185,819−3,9401.00
14 Dec 20189,759+7,5971.00
30 Nov 20182,162−4641.00
15 Nov 20182,626−12,9651.00
31 Oct 201815,591+1,5481.00
15 Oct 201814,043+12,8371.00
28 Sep 20181,206−4,6551.00
14 Sep 20185,861+5,6301.00
31 Aug 2018231−8,5971.00
15 Aug 20188,828+4,3041.00
31 Jul 20184,524−16,9281.00
13 Jul 201821,452+17,7871.00
29 Jun 20183,665−6,7071.00
15 Jun 201810,372+4,1421.00
31 May 20186,230−14,2341.00
15 May 201820,464+4,1821.00
30 Apr 201816,282−7,0641.00
13 Apr 201823,346+19,4331.00
29 Mar 20183,913−19,7531.00
15 Mar 201823,666+21,9001.00
28 Feb 20181,766−6,3081.00
15 Feb 20188,074−3881.00
31 Jan 20188,462+7,9451.00
12 Jan 2018517−14,4571.00
29 Dec 201714,974–1.00

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

Questions

Frequently asked questions

What is MUC's short interest?
262,097 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 137,451 from the previous settlement.
Why is there no percentage for MUC?
Because no defensible share count exists to divide by: an SEC filer exists but no defensible share count is available yet. The symbol maps to an SEC filer, but its share count cannot be used yet. A newly listed company needs two cover-page counts on file before the first is trusted; a split or an unexplained jump pauses publication until a fresh SEC count corroborates it; a secondary share class publishes under the company's primary line; and a foreign filer's short count is in depositary-share units. This page upgrades to a percentage automatically once a defensible count exists.
What is MUC'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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