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NMB short interest NYSE Arca

Simplify National Muni Bond ET. 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
610
vs previous settlement
−2,721 (-81.7%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for NMB: 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
112
14 Sep 2026
Highest in window
30,778
7 Jul 2026
Days with a balance
132
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Simplify National Muni Bond ET 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 31K shares.

History

Every FINRA settlement we hold for NMB, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 2026610−2,7211.00
31 Aug 20263,331+7391.00
14 Aug 20262,592−1,1121.00
31 Jul 20263,704−1,0711.00
15 Jul 20264,775−8071.00
30 Jun 20265,582+4,1451.04
15 Jun 20261,437−2,0531.00
29 May 20263,490−5421.40
15 May 20264,032−3,1511.56
30 Apr 20267,183−7,5392.70
15 Apr 202614,722+7,5972.06
31 Mar 20267,125−2,7641.45
13 Mar 20269,889+5,1933.20
27 Feb 20264,696+2,0783.10
13 Feb 20262,618−5,7971.00
30 Jan 20268,415+9553.04
15 Jan 20267,460−1742.20
31 Dec 20257,634−4643.20
15 Dec 20258,098+2,9551.88
28 Nov 20255,143−4,6473.99
14 Nov 20259,790+1,1142.56
31 Oct 20258,676−842.45
15 Oct 20258,760+4,0548.10
30 Sep 20254,706−1,7221.01
15 Sep 20256,428−7501.46
29 Aug 20257,178−48,7424.65
15 Aug 202555,920+49,5106.17
31 Jul 20256,410−3,0511.29
15 Jul 20259,461+6,4242.03
30 Jun 20253,037+1,2991.29
13 Jun 20251,738−24,0651.00
30 May 202525,803+25,6764.69
15 May 2025127−13,1511.00
30 Apr 202513,278−1,5859.16
15 Apr 202514,863+4,7171.33
31 Mar 202510,146+2,9704.49
14 Mar 20257,176+1,9221.00
28 Feb 20255,254+261.00
14 Feb 20255,228+4,1031.87
31 Jan 20251,125−2,3211.00
15 Jan 20253,446+2,5781.69
31 Dec 2024868−1,6591.00
13 Dec 20242,527−1,0551.00
29 Nov 20243,582+8251.00
15 Nov 20242,757+1,8791.62
31 Oct 2024878+1571.00
15 Oct 2024721−10,1971.00
30 Sep 202410,918+10,5696.85
13 Sep 2024349–1.00

Scroll inside the table for earlier settlements, back to 13 Sep 2024.

Questions

Frequently asked questions

What is NMB's short interest?
610 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 2,721 from the previous settlement.
Why is there no percentage for NMB?
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 NMB'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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