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HowShorted

MST short interest Nasdaq Global Market

Tidal Trust II Defiance Levera. 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
68,221
vs previous settlement
+41,747 (+157.7%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for MST: 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
16,685
14 Sep 2026
Highest in window
1,501,639
10 Nov 2025
Days with a balance
189
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Tidal Trust II Defiance Levera 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 1.5M shares.

History

Every FINRA settlement we hold for MST, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202668,221+41,7471.00
31 Aug 202626,474−26,3651.00
14 Aug 202652,839+21,2531.00
31 Jul 202631,586−3,2201.00
15 Jul 202634,806+14,2971.00
30 Jun 202620,509−7,9021.00
15 Jun 202628,411+2071.00
29 May 202628,204+12,9111.00
15 May 202615,293−6,6981.00
30 Apr 202621,991+5,9921.00
15 Apr 202615,999−23,2981.00
31 Mar 202639,297−22,7041.00
13 Mar 202662,001−84,8071.00
27 Feb 2026146,808−1,224,7341.00
13 Feb 20261,371,542−30,8971.83
30 Jan 20261,402,439+139,4482.87
15 Jan 20261,262,991+396,1422.17
31 Dec 2025866,849+312,9243.08
15 Dec 2025553,925−596,4621.41
28 Nov 20251,150,387−1,648,5541.00
14 Nov 20252,798,941+1,805,2872.23
31 Oct 2025993,654+191,7081.51
15 Oct 2025801,946−1,029,6671.22
30 Sep 20251,831,613+366,3402.96
15 Sep 20251,465,273+179,8733.71
29 Aug 20251,285,400−24,7332.55
15 Aug 20251,310,133+664,1411.61
31 Jul 2025645,992−92,4811.00
15 Jul 2025738,473+602,9251.00
30 Jun 2025135,548+55,6951.00
13 Jun 202579,853−54,7381.00
30 May 2025134,591+43,0381.00
15 May 202591,553–1.00

Scroll inside the table for earlier settlements, back to 15 May 2025.

Questions

Frequently asked questions

What is MST's short interest?
68,221 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, up 41,747 from the previous settlement.
Why is there no percentage for MST?
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 MST'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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