FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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Juan

Castillo

GKColombia · Vitória Guimarães SC

№ 662446Emerging €855k −0.54

Player dossierLiga Portugal

JuanCastillo

GKGoalkeeperGoalkeeper

Club
Vitória Guimarães SC
League
Liga Portugal
Nationality
Colombia
Age
23
Height
191 cm
Foot
Right
Valued
28 May 2026

Reading the valuation

The market values Castillo at €500k. Model A, which never saw Castillo during training, estimates €855k: the market value is 42% below that estimate.

That is a factor of ×1.71. Model A's typical held-out miss is ×1.50 either way, so this gap is larger than its usual error.

Without league and club, Model B estimates €1M, 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.

▼ −0.54A €855k▼ −0.72B €1M
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
16
Minutes
1,440
Started
16/16
Min / app
90
Cards
1Y 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 Castillo…

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 €500k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €500kModel A €855k

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

Juan Castillo's percentiles among goalkeepers: Minutes, two years 28th, Starts 62nd, Minutes, last 365 days 47th, European club minutes 32nd28thMinutes62ndStarts47thRecent32ndEurope

Dashed ring: the goalkeeper median (50th percentile)

Starts

Share of appearances started rather than entered from the bench.

100% this player100% goalkeeper median62nd percentile

70%peer deciles · median line · this player ●100%

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
€150k
Sept 2022
Peak
€1M
Sept 2024
Model target
€500k
May 2026
Valuations
14
1 club change
May 2026€500kVitória Guimarães SCValuation the model is trained to reproduce

May 2026: €500k, Vitória Guimarães SC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2022-09-05€150kFortaleza CEIF
2022-12-30€150kFortaleza CEIF
2023-07-12€250kFortaleza CEIF
2024-01-04€300kFortaleza CEIF
2024-03-05€600kFortaleza CEIF
2024-06-11€800kFortaleza CEIF
2024-09-23€1MFortaleza CEIF
2024-12-10€1MFortaleza CEIF
2025-04-07€800kFortaleza CEIF
2025-06-20€600kFortaleza CEIF
2025-09-30€800kVitória Guimarães SC
2025-12-18€1MVitória Guimarães SC
2026-03-19€700kVitória Guimarães SC
2026-05-28€500kVitória Guimarães SC

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
−0.536

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 20% of the 423 Liga Portugal players.

€20k€200k€2M€20M€500kSee them in the Explorer →

Goalkeepers, all leagues485 players · median €1M

Valued above 27% of the 485 goalkeepers.

€20k€200k€2M€20M€500kSee them in the Explorer →

Where Castillo 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).