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HowShorted

BFIX short interest NYSE Arca

Build Bond Innovation 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
11,510
vs previous settlement
−813 (-6.6%)
days to cover
1.20
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for BFIX: 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
341
10 Sep 2026
Highest in window
11,687
7 Jul 2026
Days with a balance
146
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Build Bond Innovation 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 12K shares.

History

Every FINRA settlement we hold for BFIX, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202611,510−8131.20
31 Aug 202612,323+2,5345.69
14 Aug 20269,789−796.54
31 Jul 20269,868−39,3757.93
15 Jul 202649,243+48,7174.06
30 Jun 2026526−1671.00
15 Jun 2026693−1841.00
29 May 2026877+6691.00
15 May 2026208−1,7251.00
30 Apr 20261,933+1,2751.35
15 Apr 2026658−3161.00
31 Mar 2026974+8021.00
13 Mar 2026172−221.00
27 Feb 2026194−7,6261.00
13 Feb 20267,820+4554.82
30 Jan 20267,365+3,8166.37
15 Jan 20263,549−13,3581.60
31 Dec 202516,907+5,46110.33
15 Dec 202511,446+3,9686.48
28 Nov 20257,478−5805.64
14 Nov 20258,058+3,9371.12
31 Oct 20254,121−6,7451.94
15 Oct 202510,866+6,0234.46
30 Sep 20254,843+2,7161.34
15 Sep 20252,127+6761.55
29 Aug 20251,451+3181.00
15 Aug 20251,133−1,0611.00
31 Jul 20252,194+3761.00
15 Jul 20251,818−3181.00
30 Jun 20252,136+4191.00
13 Jun 20251,717+4971.00
30 May 20251,220−71.00
15 May 20251,227+2011.00
30 Apr 20251,026−5,1431.00
15 Apr 20256,169+5,2311.00
31 Mar 2025938−12,8431.00
14 Mar 202513,781+4,81514.58
28 Feb 20258,966+1,71317.68
14 Feb 20257,253+1,28610.12
31 Jan 20255,967−1,7027.90
15 Jan 20257,669+1,8654.27
31 Dec 20245,804−2,38310.09
13 Dec 20248,187+2514.72
29 Nov 20247,936−1078.10
15 Nov 20248,043−68910.07
31 Oct 20248,732+1,3325.21
15 Oct 20247,400−4,7091.44
30 Sep 202412,109+1,1632.88
13 Sep 202410,946+1,57718.65
30 Aug 20249,369−2,45117.35
15 Aug 202411,820+29018.97
31 Jul 202411,530−63116.66
15 Jul 202412,161−5,0001.84
28 Jun 202417,161+3,82620.58
14 Jun 202413,335−30032.21
31 May 202413,635+6815.07
15 May 202413,567−1,04418.46
30 Apr 202414,611+14,59620.70
15 Apr 202415−761.00
28 Mar 202491−291.00
15 Mar 2024120−13,1091.00
29 Feb 202413,229+12,3652.63
15 Feb 2024864+2101.33
31 Jan 2024654+6431.00
12 Jan 202411+101.00
30 Nov 20231−271.00
15 Nov 202328−2651.00
31 Oct 2023293−4191.00
13 Oct 2023712−7,5891.16
29 Sep 20238,301−1,5086.59
15 Sep 20239,809+20515.09
31 Aug 20239,604−65548.75
15 Aug 202310,259−2,13011.85
31 Jul 202312,389−64919.95
14 Jul 202313,038−1,9141.70
30 Jun 202314,952+74622.86
15 Jun 202314,206+3,32123.10
31 May 202310,885+2,56720.89
15 May 20238,318+3,9076.31
28 Apr 20234,411+4944.88
14 Apr 20233,917−11,7391.82
31 Mar 202315,656+8,96111.15
15 Mar 20236,695−1,71512.35
28 Feb 20238,410−1,2685.88
15 Feb 20239,678−356.36
31 Jan 20239,713+2,2621.00
13 Jan 20237,451−11,6203.44
30 Dec 202219,071+2,50113.84
15 Dec 202216,570+1,86612.37
30 Nov 202214,704+8,9554.24
15 Nov 20225,749+4521.00
31 Oct 20225,297+4,9711.11
14 Oct 2022326+1381.00
30 Sep 2022188−7901.00
15 Sep 2022978+3871.43
31 Aug 2022591−1021.00
15 Aug 2022693−2,6131.00
29 Jul 20223,306+1,7131.60
15 Jul 20221,593+1,3991.00
30 Jun 2022194−6,8591.00
15 Jun 20227,053+5275.93
31 May 20226,526+6,2204.29
13 May 2022306−4,4591.00
29 Apr 20224,765+1,3641.00
14 Apr 20223,401+2,6441.00
31 Mar 2022757−9701.00
15 Mar 20221,727−3,2051.00
28 Feb 20224,932+3,1981.00
15 Feb 20221,734–1.00

Scroll inside the table for earlier settlements, back to 15 Feb 2022.

Questions

Frequently asked questions

What is BFIX's short interest?
11,510 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 813 from the previous settlement.
Why is there no percentage for BFIX?
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 BFIX's days to cover?
1.20 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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