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VBIL short interest Nasdaq Global Market

Vanguard Institutional Index F. 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
1,636,424
vs previous settlement
+883,170 (+117.2%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for VBIL: 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
2,299
10 Sep 2026
Highest in window
717,109
18 Aug 2026
Days with a balance
137
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Vanguard Institutional Index F 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 717K shares.

History

Every FINRA settlement we hold for VBIL, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20261,636,424+883,1701.00
31 Aug 2026753,254+89,5491.00
14 Aug 2026663,705+266,8181.00
31 Jul 2026396,887−1,213,3451.00
15 Jul 20261,610,232+735,2611.00
30 Jun 2026874,971+41,6141.00
15 Jun 2026833,357−978,2511.00
29 May 20261,811,608+456,5241.00
15 May 20261,355,084+1,165,0251.00
30 Apr 2026190,059−440,8971.00
15 Apr 2026630,956−106,5841.00
31 Mar 2026737,540−103,5721.00
13 Mar 2026841,112+359,3201.00
27 Feb 2026481,792−76,2681.00
13 Feb 2026558,060+372,4481.00
30 Jan 2026185,612−388,6681.00
15 Jan 2026574,280+61,5001.00
31 Dec 2025512,780+333,4561.00
15 Dec 2025179,324−446,5661.00
28 Nov 2025625,890+145,9881.00
14 Nov 2025479,902−106,5851.00
31 Oct 2025586,487+457,9221.00
15 Oct 2025128,565−441,4081.00
30 Sep 2025569,973+224,3981.00
15 Sep 2025345,575+317,2231.00
29 Aug 202528,352−60,2781.00
15 Aug 202588,630+46,9631.00
31 Jul 202541,667−206,4531.00
15 Jul 2025248,120+209,8171.00
30 Jun 202538,303−12,6301.00
13 Jun 202550,933+12,9161.00
30 May 202538,017−38,8261.00
15 May 202576,843+25,8581.00
30 Apr 202550,985−13,7311.00
15 Apr 202564,716+32,1161.00
31 Mar 202532,600−5,0031.00
14 Mar 202537,603+11,3011.00
28 Feb 202526,302+21,9921.00
14 Feb 20254,310–1.00

Scroll inside the table for earlier settlements, back to 14 Feb 2025.

Questions

Frequently asked questions

What is VBIL's short interest?
1,636,424 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 883,170 from the previous settlement.
Why is there no percentage for VBIL?
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 VBIL'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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