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MSTY short interest NYSE Arca

YieldMax MSTR Option Income St. 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
4,439,280
vs previous settlement
−1,183,438 (-21.0%)
days to cover
1.99
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for MSTY: 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
33,721
14 Sep 2026
Highest in window
2,591,621
20 Oct 2025
Days with a balance
185
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for YieldMax MSTR Option Income St 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 2.6M shares.

History

Every FINRA settlement we hold for MSTY, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 20264,439,280−1,183,4381.99
31 Aug 20265,622,718+817,0772.20
14 Aug 20264,805,641+1,916,7303.53
31 Jul 20262,888,911−815,0482.95
15 Jul 20263,703,959+393,9973.26
30 Jun 20263,309,962+123,8841.77
15 Jun 20263,186,078+602,9851.77
29 May 20262,583,093−2,974,2221.41
15 May 20265,557,315+897,1162.86
30 Apr 20264,660,199+1,028,8692.48
15 Apr 20263,631,330+361,2422.93
31 Mar 20263,270,088−681,8722.95
13 Mar 20263,951,960−507,2335.72
27 Feb 20264,459,193+416,2406.26
13 Feb 20264,042,953+219,3961.95
30 Jan 20263,823,557−1,224,6702.27
15 Jan 20265,048,227−235,9083.66
31 Dec 20255,284,135+690,5273.51
15 Dec 20254,593,608−16,602,3561.74
28 Nov 202521,195,964−2,334,1611.81
14 Nov 202523,530,125−7,671,6092.06
31 Oct 202531,201,734−4,141,4163.09
15 Oct 202535,343,150−816,7164.18
30 Sep 202536,159,866+2,037,2783.44
15 Sep 202534,122,588−3,658,6424.09
29 Aug 202537,781,230−1,323,7443.61
15 Aug 202539,104,974+1,420,4983.48
31 Jul 202537,684,476−834,1213.06
15 Jul 202538,518,597−7,526,3173.26
30 Jun 202546,044,914+5,222,4125.47
13 Jun 202540,822,502−2,817,0053.44
30 May 202543,639,507+13,792,5543.84
15 May 202529,846,953+5,787,0232.56
30 Apr 202524,059,930+7,898,5873.82
15 Apr 202516,161,343−2,638,1052.02
31 Mar 202518,799,448+375,7724.38
14 Mar 202518,423,676+2,706,4292.54
28 Feb 202515,717,247−1,039,8632.05
14 Feb 202516,757,110+3,161,5712.70
31 Jan 202513,595,539+9,623,1802.88
15 Jan 20253,972,359+1,225,8291.00
31 Dec 20242,746,530+1,322,6871.00
13 Dec 20241,423,843−1,201,0041.00
29 Nov 20242,624,847+316,3741.00
15 Nov 20242,308,473+2,069,5071.00
31 Oct 2024238,966+32,6591.00
15 Oct 2024206,307+44,4431.00
30 Sep 2024161,864−50,8441.00
13 Sep 2024212,708+55,4961.00
30 Aug 2024157,212+16,3721.00
15 Aug 2024140,840−46,6681.00
31 Jul 2024187,508−221,0461.00
15 Jul 2024408,554+333,6931.00
28 Jun 202474,861−173,1751.00
14 Jun 2024248,036+162,2841.00
31 May 202485,752−23,6971.00
15 May 2024109,449+66,4611.00
30 Apr 202442,988+32,4011.00
15 Apr 202410,587−38,3941.00
28 Mar 202448,981−2,9721.00
15 Mar 202451,953+39,5411.00
29 Feb 202412,412–1.00

Scroll inside the table for earlier settlements, back to 29 Feb 2024.

Questions

Frequently asked questions

What is MSTY's short interest?
4,439,280 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 1,183,438 from the previous settlement.
Why is there no percentage for MSTY?
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 MSTY's days to cover?
1.99 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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