XBI stock
SPDR® S&P Biotech ETF (XBI) short interest & short volume · 69.9M shares short
SPDR® S&P Biotech ETF official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
XBI short interest fell 5.8% to 69.9M shares in the Oct 15, 2026 report (6.6 days to cover). Daily short volume averaged 64.7% of volume over the last 20 sessions, up from 62.9% the 20 sessions before, the 57th percentile of its own 20-day averages since Oct 6, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 69.9M
- prior 74.2M
- % of float
- —
- no float on file
- Days to cover
- 6.6
- avg vol 10.6M
- Change vs prior report
- -5.8%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 69.9M | $10.47B | -5.8% | — | 6.6 | $149.78 |
| Sep 30, 2026 | 74.2M | $11.70B | -1.4% | — | 8.0 | $157.68 |
| Sep 15, 2026 | 75.3M | $11.59B | +1.1% | — | 9.9 | $154.03 |
| Aug 31, 2026 | 74.5M | $12.10B | -3.5% | — | 8.1 | $162.50 |
| Aug 14, 2026 | 77.1M | $12.14B | -2.2% | — | 10.4 | $157.41 |
| Jul 31, 2026 | 78.8M | $11.59B | +5.0% | — | 9.5 | $147.01 |
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)
- 53.1%
- 927K of 1.7M
- 20-day average
- 64.7%
- prior 62.9%
- Percentile vs own history
- 57th
- 233 periods since 2025
Loading prices…
Source: FINRA Reg SHO daily short sale volume · Latest Nov 11, 2026
Short squeeze score (model)
Price since settlement: +0.9%
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.
XBI'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 · XBI overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-11 | 927,448 | 1,746,926 | 53.1% |
| 2026-11-10 | 1,381,477 | 1,993,319 | 69.3% |
| 2026-11-09 | 1,419,300 | 2,212,471 | 64.2% |
| 2026-11-06 | 1,595,940 | 2,614,858 | 61.0% |
| 2026-11-05 | 2,297,105 | 3,734,154 | 61.5% |
| 2026-11-04 | 2,944,982 | 3,931,943 | 74.9% |
| 2026-11-03 | 1,214,869 | 1,611,617 | 75.4% |
| 2026-11-02 | 1,636,534 | 2,317,956 | 70.6% |
| 2026-10-30 | 1,890,211 | 3,306,344 | 57.2% |
| 2026-10-29 | 2,255,350 | 3,258,277 | 69.2% |
XBI short interest FAQ
What is XBI's short interest?
SPDR® S&P Biotech ETF (XBI) had 69.9M shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does XBI have?
6.6 days: 69.9M shares short divided by an average daily volume of 10.6M for the Oct 15, 2026 period.
Is XBI short interest rising or falling?
XBI short interest fell (-5.8%) from 74.2M to 69.9M shares in the Oct 15, 2026 report.
Is XBI a short squeeze candidate?
Lician's squeeze watch scores XBI 17 out of 100 (low) from the Oct 15, 2026 report: days to cover 16.5/25, change in short interest vs prior report 0/15, price change since settlement date 0.7/20. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of XBI daily volume is sold short?
64.7% on average over the last 20 sessions to Nov 11, 2026 (FINRA Reg SHO daily short volume; the 57th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was XBI's latest FINRA short volume?
On Nov 11, 2026, cached FINRA short volume for SPDR® S&P Biotech ETF (XBI) was 927,448 shares, 53.1% of 1,746,926 total volume.
How many XBI short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for SPDR® S&P Biotech ETF (XBI), from Oct 29, 2026 through Nov 11, 2026.
How did XBI short volume percent change from the prior cached session?
Cached FINRA short volume for SPDR® S&P Biotech ETF (XBI) moved from 69.3% on Nov 10, 2026 to 53.1% on Nov 11, 2026, down 16.2 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.