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HowShorted

BUCK short interest NYSE Arca

Simplify Treasury Option Incom. 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
309,140
vs previous settlement
−19,312 (-5.9%)
days to cover
1.24
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for BUCK: 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
1,535
11 Sep 2026
Highest in window
24,320
9 Jul 2026
Days with a balance
132
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Simplify Treasury Option Incom 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 24K shares.

History

Every FINRA settlement we hold for BUCK, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026309,140−19,3121.24
31 Aug 2026328,452+58,1171.59
14 Aug 2026270,335−15,6301.49
31 Jul 2026285,965−85,1561.81
15 Jul 2026371,121+14,3752.42
30 Jun 2026356,746+3,4851.28
15 Jun 2026353,261+41,9842.37
29 May 2026311,277−36,5822.28
15 May 2026347,859−93,1752.67
30 Apr 2026441,034+108,6923.35
15 Apr 2026332,342+61,1132.14
31 Mar 2026271,229−23,6651.86
13 Mar 2026294,894−74,6741.43
27 Feb 2026369,568+103,0132.09
13 Feb 2026266,555+5,0391.00
30 Jan 2026261,516−63,1771.00
15 Jan 2026324,693+49,9182.29
31 Dec 2025274,775+7,2281.51
15 Dec 2025267,547+8,9571.97
28 Nov 2025258,590+1,7261.56
14 Nov 2025256,864−68,3722.08
31 Oct 2025325,236−4842.34
15 Oct 2025325,720−11,4312.36
30 Sep 2025337,151−104,3832.95
15 Sep 2025441,534+103,3563.20
29 Aug 2025338,178+4,1842.52
15 Aug 2025333,994−88,8022.50
31 Jul 2025422,796+107,4683.73
15 Jul 2025315,328−34,0312.13
30 Jun 2025349,359−7,6211.94
13 Jun 2025356,980−69,3662.51
30 May 2025426,346+109,5862.65
15 May 2025316,760+17,1331.15
30 Apr 2025299,627+49,3842.20
15 Apr 2025250,243−171,4851.00
31 Mar 2025421,728+33,9471.00
14 Mar 2025387,781−55,7971.00
28 Feb 2025443,578+34,7711.21
14 Feb 2025408,807+123,5371.88
31 Jan 2025285,270−113,8751.00
15 Jan 2025399,145+87,7421.48
31 Dec 2024311,403−17,9692.40
13 Dec 2024329,372+48,2653.52
29 Nov 2024281,107−22,7112.75
15 Nov 2024303,818+6,4165.33
31 Oct 2024297,402+2,8414.53
15 Oct 2024294,561−51,2033.30
30 Sep 2024345,764+63,3105.13
13 Sep 2024282,454−1278.19
30 Aug 2024282,581+244,1415.16
15 Aug 202438,440−26,1061.51
31 Jul 202464,546+23,4041.00
15 Jul 202441,142−18,9851.19
28 Jun 202460,127+22,4962.04
14 Jun 202437,631−2,5231.67
31 May 202440,154+26,3371.82
15 May 202413,817−5,3091.00
30 Apr 202419,126+7,7741.00
15 Apr 202411,352−45,0441.00
28 Mar 202456,396+15,9921.42
15 Mar 202440,404+20,8321.22
29 Feb 202419,572−3,6051.00
15 Feb 202423,177+1,3791.00
31 Jan 202421,798+14,3781.00
12 Jan 20247,420+2,0891.00
29 Dec 20235,331−3,4621.00
15 Dec 20238,793−4,8761.00
30 Nov 202313,669+5,6441.00
15 Nov 20238,025+7,2591.00
31 Oct 2023766+6721.00
13 Oct 202394+361.00
29 Sep 202358−1,0311.00
15 Sep 20231,089+9931.00
31 Aug 202396−4,0201.00
15 Aug 20234,116−1,7641.22
31 Jul 20235,880−14,3591.00
14 Jul 202320,239+8,1923.51
30 Jun 202312,047−1,2636.13
15 Jun 202313,310−10,6166.07
31 May 202323,926+12,1796.99
15 May 202311,747−14,3963.65
28 Apr 202326,143+4,25318.92
14 Apr 202321,890−7,3003.38
31 Mar 202329,190+22,0624.29
15 Mar 20237,128+2391.00
28 Feb 20236,889−1,0444.70
15 Feb 20237,933+68213.36
31 Jan 20237,251−10,8255.42
13 Jan 202318,076+2418.33
30 Dec 202218,052+3342.28
15 Dec 202218,019−7646.52
30 Nov 202218,783+15,3232.63
15 Nov 20223,460–1.00

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

Questions

Frequently asked questions

What is BUCK's short interest?
309,140 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 19,312 from the previous settlement.
Why is there no percentage for BUCK?
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 BUCK's days to cover?
1.24 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.

Ranked companies with a percentage: most shorted US stocks. Other funds by shares short and days to cover: most shorted ETFs. Other symbols with counts only: shares short without a percentage. Browse by name: US companies A to Z.