Invesco National AMT-Free Municipal Bond ETF (PZA) short interest & short volume · 164K shares short
Invesco National AMT-Free Municipal Bond ETF official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
PZA short interest fell 57.8% to 164K shares in the Oct 15, 2026 report (1.0 days to cover). Daily short volume averaged 31.9% of volume over the last 20 sessions, up from 21.6% the 20 sessions before, the 42nd percentile of its own 20-day averages since Oct 6, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 164K
- prior 389K
- % of float
- —
- no float on file
- Days to cover
- 1.0
- avg vol 5.0M
- Change vs prior report
- -57.8%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 164K | $3.6M | -57.8% | — | 1.0 | $21.59 |
| Sep 30, 2026 | 389K | $8.3M | +31.3% | — | 1.0 | $21.39 |
| Sep 15, 2026 | 297K | $6.5M | +94.8% | — | 1.0 | $21.98 |
| Aug 31, 2026 | 152K | $3.4M | -33.9% | — | 1.0 | $22.60 |
| Aug 14, 2026 | 230K | $5.3M | -6.7% | — | 1.0 | $23.03 |
| Jul 31, 2026 | 247K | $5.6M | -53.1% | — | 1.0 | $22.86 |
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)
- 43.3%
- 420K of 970K
- 20-day average
- 31.9%
- prior 21.6%
- Percentile vs own history
- 42nd
- 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.
PZA'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 · PZA overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-11 | 420,181 | 970,298 | 43.3% |
| 2026-11-10 | 1,021,860 | 2,000,728 | 51.1% |
| 2026-11-09 | 1,075,672 | 1,745,244 | 61.6% |
| 2026-11-06 | 820,517 | 1,856,046 | 44.2% |
| 2026-11-05 | 699,632 | 1,655,504 | 42.3% |
| 2026-11-04 | 414,079 | 989,705 | 41.8% |
| 2026-11-03 | 518,291 | 1,132,182 | 45.8% |
| 2026-11-02 | 1,121,149 | 2,158,433 | 51.9% |
| 2026-10-30 | 537,149 | 1,952,381 | 27.5% |
| 2026-10-29 | 489,396 | 1,534,399 | 31.9% |
PZA short interest FAQ
What is PZA's short interest?
Invesco National AMT-Free Municipal Bond ETF (PZA) had 164K shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does PZA have?
1.0 days: 164K shares short divided by an average daily volume of 5.0M for the Oct 15, 2026 period.
Is PZA short interest rising or falling?
PZA short interest fell (-57.8%) from 389K to 164K shares in the Oct 15, 2026 report.
Is PZA a short squeeze candidate?
Lician's squeeze watch scores PZA 3 out of 100 (low) from the Oct 15, 2026 report: days to cover 2.5/25, change in short interest vs prior report 0/15. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of PZA daily volume is sold short?
31.9% on average over the last 20 sessions to Nov 11, 2026 (FINRA Reg SHO daily short volume; the 42nd percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was PZA's latest FINRA short volume?
On Nov 11, 2026, cached FINRA short volume for Invesco National AMT-Free Municipal Bond ETF (PZA) was 420,181 shares, 43.3% of 970,298 total volume.
How many PZA short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Invesco National AMT-Free Municipal Bond ETF (PZA), from Oct 29, 2026 through Nov 11, 2026.
How did PZA short volume percent change from the prior cached session?
Cached FINRA short volume for Invesco National AMT-Free Municipal Bond ETF (PZA) moved from 51.1% on Nov 10, 2026 to 43.3% on Nov 11, 2026, down 7.8 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.