MGC stock
Vanguard Mega Cap Index Fund ETF Shares (MGC) short interest & short volume · 37K shares short
Vanguard Mega Cap Index Fund ETF Shares official short interest (FINRA, twice monthly) and daily short volume (FINRA Reg SHO), with history, % of float and days to cover.
What changed
MGC short interest rose 10.5% to 37K shares in the Oct 15, 2026 report (1.0 days to cover). Daily short volume averaged 55.6% of volume over the last 20 sessions, down from 60.3% the 20 sessions before, the 64th percentile of its own 20-day averages since Oct 6, 2025.
Short interest
Official, twice monthly · settled Oct 15, 2026
- Shares short
- 37K
- prior 33K
- % of float
- —
- no float on file
- Days to cover
- 1.0
- avg vol 116K
- Change vs prior report
- +10.5%
| Report date | Shares short | $ value short | Change | % float | Days to cover | Price |
|---|---|---|---|---|---|---|
| Oct 15, 2026 | 37K | $10.5M | +10.5% | — | 1.0 | $284.72 |
| Sep 30, 2026 | 33K | $9.4M | +63.5% | — | 1.0 | $282.31 |
| Sep 15, 2026 | 20K | $5.7M | +56.2% | — | 1.0 | $278.81 |
| Aug 31, 2026 | 13K | $3.7M | -65.1% | — | 1.0 | $281.45 |
| Aug 14, 2026 | 37K | $10.6M | -35.7% | — | 1.0 | $284.07 |
| Jul 31, 2026 | 58K | $15.9M | +160.8% | — | 1.0 | $273.05 |
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)
- 48.5%
- 17K of 34K
- 20-day average
- 55.6%
- prior 60.3%
- Percentile vs own history
- 64th
- 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.
MGC'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 · MGC overview
| Date | Short | Total | Short % of volume |
|---|---|---|---|
| 2026-11-11 | 16,540 | 34,107 | 48.5% |
| 2026-11-10 | 49,023 | 73,762 | 66.5% |
| 2026-11-09 | 29,729 | 46,241 | 64.3% |
| 2026-11-06 | 38,021 | 115,762 | 32.8% |
| 2026-11-05 | 55,587 | 86,285 | 64.4% |
| 2026-11-04 | 44,052 | 58,441 | 75.4% |
| 2026-11-03 | 30,254 | 42,908 | 70.5% |
| 2026-11-02 | 21,608 | 47,744 | 45.3% |
| 2026-10-30 | 33,107 | 68,112 | 48.6% |
| 2026-10-29 | 36,399 | 65,352 | 55.7% |
MGC short interest FAQ
What is MGC's short interest?
Vanguard Mega Cap Index Fund ETF Shares (MGC) had 37K shares sold short and not yet covered in FINRA's Oct 15, 2026 settlement report.
How many days to cover does MGC have?
1.0 days: 37K shares short divided by an average daily volume of 116K for the Oct 15, 2026 period.
Is MGC short interest rising or falling?
MGC short interest rose (+10.5%) from 33K to 37K shares in the Oct 15, 2026 report.
Is MGC a short squeeze candidate?
Lician's squeeze watch scores MGC 6 out of 100 (low) from the Oct 15, 2026 report: days to cover 2.5/25, change in short interest vs prior report 3.2/15. It is a transparent model of how crowded the short side is, not a forecast that a squeeze will happen.
What share of MGC daily volume is sold short?
55.6% on average over the last 20 sessions to Nov 11, 2026 (FINRA Reg SHO daily short volume; the 64th percentile of its own 20-day averages). Short volume counts market makers' same-day short sales, so it is not short interest.
What was MGC's latest FINRA short volume?
On Nov 11, 2026, cached FINRA short volume for Vanguard Mega Cap Index Fund ETF Shares (MGC) was 16,540 shares, 48.5% of 34,107 total volume.
How many MGC short-volume sessions are listed on this page?
This page lists 10 cached FINRA short-volume sessions for Vanguard Mega Cap Index Fund ETF Shares (MGC), from Oct 29, 2026 through Nov 11, 2026.
How did MGC short volume percent change from the prior cached session?
Cached FINRA short volume for Vanguard Mega Cap Index Fund ETF Shares (MGC) moved from 66.5% on Nov 10, 2026 to 48.5% on Nov 11, 2026, down 18.0 percentage points.
Not investment advice. Figures as filed or reported, not a live feed.