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…

Kaique

Pereira

GKBrazil · CD Nacional

№ 964590Established €2.4M −0.17

Player dossierLiga Portugal

KaiquePereira

GKGoalkeeperGoalkeeper

Club
CD Nacional
League
Liga Portugal
Nationality
Brazil
Age
23
Height
193 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Pereira at €2M. Model A, which never saw Pereira during training, estimates €2.4M: the market value is 16% below that estimate.

That is a factor of ×1.19. 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 €2.8M, 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.

▼ −0.17A €2.4M▼ −0.35B €2.8M
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
34
Minutes
3,060
Started
34/34
Min / app
90
Cards
4Y 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 Pereira…

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 €2M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €2MModel A €2.4M

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 485 goalkeepers

Kaique Pereira's percentiles among goalkeepers: Minutes, two years 56th, Starts 62nd, Minutes, last 365 days 68th, European club minutes 32nd56thMinutes62ndStarts68thRecent32ndEurope

Dashed ring: the goalkeeper median (50th percentile)

Minutes, last 365 days

Club minutes in the final year of the window: recent involvement, or the absence of it.

2,520 this player1,560 goalkeeper median68th percentile

0peer deciles · median line · this player ●4,970

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
€400k
May 2023
Peak
€2M
May 2026
Model target
€2M
May 2026
Valuations
9
2 club changes
May 2026€2MCD NacionalValuation the model is trained to reproduce

May 2026: €2M, CD Nacional. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2023-05-12€400kSociedade Esportiva Palmeiras
2023-07-25€400kSociedade Esportiva Palmeiras
2023-12-11€400kSociedade Esportiva Palmeiras
2024-03-28€400kSociedade Esportiva Palmeiras
2024-06-17€400kSociedade Esportiva Palmeiras
2024-12-19€300kSC Farense
2025-05-30€600kSC Farense
2025-12-18€1MCD Nacional
2026-05-28€2MCD Nacional

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
−0.173

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 61% of the 423 Liga Portugal players.

€20k€200k€2M€20M€2MSee them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 59% of the 485 goalkeepers.

€20k€200k€2M€20M€2MSee them in the Explorer →

Where Pereira 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).