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HowShorted

WEEK short interest Cboe BZX

Roundhill Weekly T-Bill 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
3,386
vs previous settlement
−10,662 (-75.9%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for WEEK: 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
678
11 Sep 2026
Highest in window
15,010
23 Jul 2026
Days with a balance
145
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Roundhill Weekly T-Bill 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 15K shares.

History

Every FINRA settlement we hold for WEEK, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20263,386−10,6621.00
31 Aug 202614,048+5,4561.00
14 Aug 20268,592−2,4701.00
31 Jul 202611,062−1,6331.00
15 Jul 202612,695+8,1731.00
30 Jun 20264,522+3,5111.00
15 Jun 20261,011−8241.00
29 May 20261,835−6,6971.00
15 May 20268,532+7,6441.00
30 Apr 2026888−13,1941.00
15 Apr 202614,082−6,7471.00
31 Mar 202620,829+19,7721.00
13 Mar 20261,057−2,8531.00
27 Feb 20263,910+3,4201.00
13 Feb 2026490−3971.00
30 Jan 2026887−4,3121.00
15 Jan 20265,199+3,3831.00
31 Dec 20251,816+1,8121.00
15 Dec 20254−8341.00
28 Nov 2025838+6301.00
14 Nov 2025208−2,0781.00
15 Oct 20252,286+4071.00
15 Sep 20251,879−1,7551.00
29 Aug 20253,634−1,6781.00
15 Aug 20255,312+1,9161.00
31 Jul 20253,396+1,6121.00
15 Jul 20251,784−4511.00
30 Jun 20252,235−2901.00
13 Jun 20252,525−1,1121.00
30 May 20253,637+4771.00
15 May 20253,160−6,6171.00
30 Apr 20259,777+4821.37
15 Apr 20259,295+3,8831.34
31 Mar 20255,412+3,6951.25
14 Mar 20251,717–1.00

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

Questions

Frequently asked questions

What is WEEK's short interest?
3,386 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 10,662 from the previous settlement.
Why is there no percentage for WEEK?
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 WEEK'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.

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.