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HowShorted

MTBA short interest NYSE Arca

Simplify MBS 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
17,483
vs previous settlement
−17,450 (-50.0%)
days to cover
1.00
Settlement date
15 Sep 2026

Shares short over time

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

Fails to deliver

The SEC's fails-to-deliver figure for MTBA: 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
133
8 Sep 2026
Highest in window
29,739
10 Aug 2026
Days with a balance
112
Window
16 Sep 2025 to 14 Sep 2026
Aggregate net short position time series for Simplify MBS 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 30K shares.

History

Every FINRA settlement we hold for MTBA, newest first.

Full reported short interest history
Settlement dateShares shortChangeDays to cover
15 Sep 202617,483−17,4501.00
31 Aug 202634,933−119,3991.00
14 Aug 2026154,332+89,2211.16
31 Jul 202665,111+34,7471.00
15 Jul 202630,364+10,2731.00
30 Jun 202620,091−9,8541.00
15 Jun 202629,945+16,0071.00
29 May 202613,938−4,6171.00
15 May 202618,555+4,8611.00
30 Apr 202613,694+1,4041.00
15 Apr 202612,290−32,5771.00
31 Mar 202644,867−13,9051.00
13 Mar 202658,772+16,9071.00
27 Feb 202641,865+6,1391.00
13 Feb 202635,726+15,9521.00
30 Jan 202619,774−36,5261.00
15 Jan 202656,300+28,8761.00
31 Dec 202527,424+2,0811.00
15 Dec 202525,343−45,2441.00
28 Nov 202570,587+39,3001.00
14 Nov 202531,287+10,1541.00
31 Oct 202521,133−261,6431.00
15 Oct 2025282,776+208,6821.57
30 Sep 202574,094−87,8791.00
15 Sep 2025161,973+73,8031.03
29 Aug 202588,170+65,2951.00
15 Aug 202522,875+3,2731.00
31 Jul 202519,602−105,1571.00
15 Jul 2025124,759+103,0061.00
30 Jun 202521,753+7,6371.00
13 Jun 202514,116−55,0031.00
30 May 202569,119+11,7901.00
15 May 202557,329+42,4301.00
30 Apr 202514,899−60,2381.00
15 Apr 202575,137+38,4421.00
31 Mar 202536,695−133,8831.00
14 Mar 2025170,578+72,1341.00
28 Feb 202598,444+30,0001.00
14 Feb 202568,444−66,7651.00
31 Jan 2025135,209−11,5371.00
15 Jan 2025146,746+58,1181.00
31 Dec 202488,628−7,6051.00
13 Dec 202496,233−5,9691.00
29 Nov 2024102,202+25,3781.00
15 Nov 202476,824−20,2711.00
31 Oct 202497,095−1,333,3671.00
15 Oct 20241,430,462+1,319,7367.90
30 Sep 2024110,726−229,3701.00
13 Sep 2024340,096+249,7751.80
30 Aug 202490,321+72,2371.00
15 Aug 202418,084−40,0561.00
31 Jul 202458,140+1,2431.00
15 Jul 202456,897+28,9971.00
28 Jun 202427,900−158,0031.00
14 Jun 2024185,903+164,9312.04
31 May 202420,972−50,1921.00
15 May 202471,164−56,2241.00
30 Apr 2024127,388+37,9841.00
15 Apr 202489,404+34,3731.00
28 Mar 202455,031−16,7871.00
15 Mar 202471,818+60,3541.00
29 Feb 202411,464+1,5581.00
15 Feb 20249,906−43,7751.00
31 Jan 202453,681+8,5731.00
12 Jan 202445,108+35,2191.00
29 Dec 20239,889−5,5381.00
15 Dec 202315,427+8,2421.00
30 Nov 20237,185−64,0061.00
15 Nov 202371,191–1.00

Scroll inside the table for earlier settlements, back to 15 Nov 2023.

Questions

Frequently asked questions

What is MTBA's short interest?
17,483 shares short for settlement date 15 Sep 2026, per FINRA's consolidated short interest report, down 17,450 from the previous settlement.
Why is there no percentage for MTBA?
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 MTBA'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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