Will Napoli win the 2026-27 UEFA Champions League Championship?
Belief Systems Market Grade
Very weak market quality
As of Nov 3, 2026 · F since Oct 23, 2026Measured from Oct 4 to Nov 3, 2026
Some data was missing in this period, so no grade change can be confirmed until it recovers. Gaps are never filled in.
Rates how well this market trades, from A+ (best) to F: how much you can trade near the price, and how many different traders take part. Not a forecast of the outcome.
- Market status
- Active
- Under review
- No
- Data
- Data-limited · 100% observed
- Trading activity
- Limited trading activity
Liquidity and integrity
The two measures behind the grade.
Liquidity
Very weak
How easily the market trades: the depth of buy and sell quotes, the cost of a typical trade, and how steadily trading happens.
F since Oct 23, 2026 · steady
Integrity
Very strong
How broad and orderly trading is: how many different traders take part, and how often quotes are missing, one-sided, or crossed.
It screens for concentrated trading. It is not proof that a market can’t be manipulated, since many accounts can belong to one trader.
A+ since Nov 3, 2026 · steady
Both are recalculated daily over the same 30-day period. The overall grade moves more slowly: a change has to hold before it counts.
Grade changes
Every change stays on the record, including corrected ones.
Grades from before launch were never published, so no letters show.
- Sep 16, 2026First grade
Grade history
All three use the same A+ to F scale. Gaps are days with no grade. Dots mark days with missing data.
Details and citationShowHide
The grade
- Market status
- ActiveCurrent grade, reviewed daily.
- Under review
- No
- Data status
- Data-limitedSome data was missing, and gaps are never filled in.
- Grade limits
- D from the weaker of liquidity and integrity (in force)C+ from trading activity (in force)
- Trading activity
- Limited trading activity (T0)Little trading backed the quotes, or too few trades were seen to tell. The grade can be C+ at most.
- Grade since
- Oct 23, 2026
The data
- Data observed
- Full · 100%
- Days observed
- 30 of 30 needed
- Measured over
- Oct 4 to Nov 3, 2026
- First observed
- Aug 17, 2026
- Last complete day
- Nov 3, 2026
- Data check codes
- inputs_unavailabletrade_coverage_gap
Identifiers and versions
- Record ID
- polymarket:0xda7529b0c94d63cce1ee4492612ab21a2fd1a91f89d3765b1d1f39826157644c:1A change to what the market question means starts a new record.
- Venue
- Polymarket
- Market ID
- 0xda7529b0c94d63cce1ee4492612ab21a2fd1a91f89d3765b1d1f39826157644c
- Correction
- Original
- Calculation status
- data_limited
- Last confirmed change
- None
- Methodology version
- mg-1.2
- Calibration version
- mg-cal-1.0
Cite this grade
Market Grades by Belief Systems: Will Napoli win the 2026-27 UEFA Champions League Championship? Market Grade F (data-limited).
- Episode:
- polymarket:0xda7529b0c94d63cce1ee4492612ab21a2fd1a91f89d3765b1d1f39826157644c:1
- Flags:
- inputs_unavailable, trade_coverage_gap
- Lifecycle:
- Active
- Data status:
- Data-limited
- Under review:
- No
- Trading activity:
- Limited trading activity (T0) · grade limits D (weaker component), C+ (trading evidence)
- Book coverage:
- full · 100%
- As of:
- 2026-11-03 · window 2026-10-04 to 2026-11-03
- Versions:
- mg-1.2 / mg-cal-1.0