FairValue

Checking model

Esc

  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
  • EnvironmentTerminalExplore, compare and track players; market, league and model views.
  • EnvironmentStoriesValuations, head-to-heads and research findings, told as stories.
  • TerminalPlayer ExplorerSearch, filter and sort the player export.
  • TerminalComparison StudioTwo to four players on one scale.
  • TerminalWatchlistsNamed collections, kept in this browser.
  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

↑ ↓ to move · Enter to open · Esc to closeLoading player index…

Maracás

CBBrazil · Moreirense FC

№ 373187Emerging €927k −0.28

Player dossierLiga Portugal

Maracás

CBCentre-BackDefender

Club
Moreirense FC
League
Liga Portugal
Nationality
Brazil
Age
32
Height
184 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Maracás at €700k. Model A, which never saw Maracás during training, estimates €927k: the market value is 24% below that estimate.

That is a factor of ×1.32. Model A's typical held-out miss is ×1.50 either way, so this gap is within its usual error.

Without league and club, Model B estimates €1.4M, further from the market. Model B is usually further off (typical miss ×2.07): league and club explain much of how the market prices players.

A gap describes the model's arithmetic for this player's inputs, not what the player is worth.

▼ −0.28A €927k▼ −0.71B €1.4M
Pitch length is a log value scale fitted to this player's figures. ● observed · ◇ Model A · dashed ◇ Model B · each arc is a residual, log(observed) − log(estimate).
Apps
59
Minutes
5,060
Goals
5
Assists
1
Started
56/59
Min / app
86
Cards
15Y 0R

Club matches, two years to the valuation date

The Valuation Journey

What moves Model A

Asking the prediction API to explain Model A for Maracás…

SHAP describes the model's arithmetic for this player's inputs, not what causes market value. Model B can be explained only by the live service; Model A also has a published explanation for the research players.

Model A vs Model B against the observed €700k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €700kModel A €927k

Asking the prediction API…

Held-out estimates come from cross-validation, with this player outside the training data: the honest comparison. Served models were refitted on every player, this one included, so they sit closer to the market. Shaded band: Model A's typical miss (×1.50 either way).

Player traitspercentiles vs 2,065 defenders

Maracás's percentiles among defenders: Goals per 90 83rd, Assists per 90 36th, Minutes, two years 84th, Starts 84th, Minutes, last 365 days 78th, European club minutes 30th83rdGoals36thAssists84thMinutes84thStarts78thRecent30thEurope

Dashed ring: the defender median (50th percentile)

Minutes, two years

Total club minutes in the two-year window: how much the player was used.

5,060 this player2,860 defender median84th percentile

451peer deciles · median line · this player ●9,111

No passing, progression or defensive actions exist in the dataset, so no trait claims to measure them.

Valuation history every Transfermarkt valuation on record

First valuation
€75k
May 2015
Peak
€1M
Dec 2021
Model target
€700k
May 2026
Valuations
19
4 club changes
May 2026€700kMoreirense FCValuation the model is trained to reproduce

May 2026: €700k, Moreirense FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2015-05-31€75kUnknown
2015-09-11€75kUnknown
2015-12-15€75kUnknown
2019-10-11€300kFC Paços de Ferreira
2019-12-30€300kFC Paços de Ferreira
2020-08-17€400kFC Paços de Ferreira
2021-01-28€700kFC Paços de Ferreira
2021-05-21€700kFC Paços de Ferreira
2021-12-27€1MFC Paços de Ferreira
2022-05-31€900kFC Paços de Ferreira
2022-10-07€750kAl-Wahda FC
2023-03-02€700kFC Paços de Ferreira
2023-06-16€500kFC Paços de Ferreira
2023-12-27€600kMoreirense FC
2024-06-06€1MMoreirense FC
2024-12-19€1MMoreirense FC
2025-05-30€1MMoreirense FC
2025-12-18€800kMoreirense FC
2026-05-28€700kMoreirense FC

Audit context group-level, not about this player

Audit group
non-UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
−0.280

The group comes from first-listed citizenship and is never a model input. Across the population, non-UEFA players' market values sit about 10% above Model A's held-out estimates, relative to UEFA players in the same leagues. One player's residual says nothing about that pattern (typical miss ×1.50), and none of it is evidence of discrimination: the target may itself be biased. Open the Fairness Audit

In context observed value among comparable players in this build

All players in the Terminal →

Liga Portugal423 players · median €1M

Valued above 33% of the 423 Liga Portugal players.

€20k€200k€2M€20M€700kSee them in the Explorer →

Defenders, all leagues2,065 players · median €2M

Valued above 26% of the 2,065 defenders.

€20k€200k€2M€20M€700kSee them in the Explorer →

Where Maracás appears

Watchlists and the comparison tray are kept in this browser only.

Near this valuation closest observed values: same league, then same position

Counts and ranks of observed Transfermarkt values only; model errors are never ranked here. Full player export: Every player in the modelling population (D-011).