SPMB stock
SPDR Portfolio Mortgage Backed Bond (SPMB) short interest & short volume · 724K shares short
SPDR Portfolio Mortgage Backed Bond official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
SPMB short interest rose 76.8% to 724K shares in the Oct 15, 2026 report (1.0 days to cover). Daily short volume averaged 57.1% of volume over the last 20 sessions, up from 43.7% the 20 sessions before, the 41st percentile of its own 20-day averages since Oct 6, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 724K
- prior 409K
- % of float
- —
- no float on file
- Days to cover
- 1.0
- avg vol 2.8M
- Change vs prior report
- +76.8%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 724K | $15.5M | +76.8% | — | 1.0 | $21.39 |
| Sep 30, 2026 | 409K | $8.7M | -1.7% | — | 1.0 | $21.14 |
| Sep 15, 2026 | 417K | $9.0M | +73.4% | — | 1.0 | $21.55 |
| Aug 31, 2026 | 240K | $5.3M | -37.4% | — | 1.0 | $21.97 |
| Aug 14, 2026 | 384K | $8.4M | -57.1% | — | 1.0 | $22.00 |
| Jul 31, 2026 | 896K | $19.6M | +261.2% | — | 1.0 | $21.92 |
Days to cover is short interest divided by FINRA's average daily volume for the period: how many average days of trading it would take shorts to buy back.
Source: FINRA equity short interest (twice monthly) · Settlement Oct 15, 2026
Daily short volume
Share of each day's volume sold short · FINRA Reg SHO
- Latest (Nov 11)
- 47.8%
- 282K of 589K
- 20-day average
- 57.1%
- prior 43.7%
- Percentile vs own history
- 41st
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 11, 2026
Short squeeze score (model)
Model, not a forecast: 40 pts short interest % of float (full at 30%), 25 pts days to cover (full at 10), 15 pts rise in short interest since the prior report (full at +50%), 20 pts price gain since the settlement date (full at +25%). Missing inputs score 0.
SPMB's squeeze score and its inputs with Lician Pro.Start 3-day trial — $149/yr
Market-wide: most shorted stocks, biggest changes and unusual short volume · SPMB overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-11 | 281,590 | 588,924 | 47.8% |
| 2026-11-10 | 1,229,992 | 1,730,334 | 71.1% |
| 2026-11-09 | 462,153 | 767,493 | 60.2% |
| 2026-11-06 | 1,139,080 | 1,664,132 | 68.5% |
| 2026-11-05 | 1,597,622 | 2,065,515 | 77.3% |
| 2026-11-04 | 1,062,261 | 1,542,917 | 68.8% |
| 2026-11-03 | 713,991 | 1,179,150 | 60.5% |
| 2026-11-02 | 607,008 | 964,370 | 62.9% |
| 2026-10-30 | 701,668 | 1,321,994 | 53.1% |
| 2026-10-29 | 511,522 | 1,486,459 | 34.4% |
SPMB short interest FAQ
What is SPMB's short interest?
SPDR Portfolio Mortgage Backed Bond (SPMB) had 724K shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does SPMB have?
1.0 days: 724K shares short divided by an average daily volume of 2.8M for the Oct 15, 2026 period.
Is SPMB short interest rising or falling?
SPMB short interest rose (+76.8%) from 409K to 724K shares in the Oct 15, 2026 report.
Is SPMB a short squeeze candidate?
Lician's squeeze watch scores SPMB 18 out of 100 (low) from the Oct 15, 2026 report: days to cover 2.5/25, change in short interest vs prior report 15/15. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of SPMB daily volume is sold short?
57.1% on average over the last 20 sessions to Nov 11, 2026 (FINRA Reg SHO daily short volume; the 41st percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was SPMB's latest FINRA short volume?
On Nov 11, 2026, cached FINRA short volume for SPDR Portfolio Mortgage Backed Bond (SPMB) was 281,590 shares, 47.8% of 588,924 total volume.
How many SPMB short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for SPDR Portfolio Mortgage Backed Bond (SPMB), from Oct 29, 2026 through Nov 11, 2026.
How did SPMB short volume percent change from the prior cached session?
Cached FINRA short volume for SPDR Portfolio Mortgage Backed Bond (SPMB) moved from 71.1% on Nov 10, 2026 to 47.8% on Nov 11, 2026, down 23.3 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.