FairValue

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

Kluivert

CBNetherlands · Olympique Lyon

№ 578421Established €9.2M −0.14

Player dossierLigue 1

RubenKluivert

CBCentre-BackDefender

Club
Olympique Lyon
League
Ligue 1
Nationality
Netherlands
Age
25
Height
187 cm
Foot
Right
Valued
1 Jun 2026

Reading the valuation

The market values Kluivert at €8M. Model A, which never saw Kluivert during training, estimates €9.2M: the market value is 13% below that estimate.

That is a factor of ×1.15. 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 €4.8M, 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.

▼ −0.14A €9.2M▲ +0.51B €4.8M
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
43
Minutes
2,438
Goals
3
Assists
3
Started
27/43
Min / app
57
Cards
12Y 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 Kluivert…

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 €8M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €8MModel A €9.2M

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

Ruben Kluivert's percentiles among defenders: Goals per 90 90th, Assists per 90 80th, Minutes, two years 42nd, Starts 18th, Minutes, last 365 days 35th, European club minutes 82nd90thGoals80thAssists42ndMinutes18thStarts35thRecent82ndEurope

Dashed ring: the defender median (50th percentile)

Goals per 90

Club goals per 90 minutes played in the two years to the valuation date.

0.11 this player0.03 defender median90th percentile

0.00peer deciles · median line · this player ●0.41

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
€25k
Aug 2020
Peak
€8M
Jun 2026
Model target
€8M
Jun 2026
Valuations
17
4 club changes
Jun 2026€8MOlympique LyonValuation the model is trained to reproduce

Jun 2026: €8M, Olympique Lyon. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2020-08-12€25kFC Utrecht U21
2020-10-24€100kFC Utrecht U21
2020-12-31€200kFC Utrecht U21
2021-10-12€200kFC Utrecht U21
2022-01-12€200kFC Utrecht U21
2022-06-23€200kFC Utrecht U21
2022-09-14€300kFC Utrecht
2022-11-11€300kFC Utrecht
2023-06-23€500kFC Utrecht
2024-01-08€500kFC Dordrecht
2024-06-10€600kFC Dordrecht
2024-12-19€800kCasa Pia AC
2025-05-30€700kCasa Pia AC
2025-10-10€2.5MOlympique Lyon
2025-12-15€2.5MOlympique Lyon
2026-03-27€6MOlympique Lyon
2026-06-01€8MOlympique Lyon

Audit context group-level, not about this player

Audit group
UEFA
Population gap, Model A
+0.093 95% CI +0.063 to +0.124
This player, market vs held-out A
−0.143

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 →

Ligue 1423 players · median €5M

Valued above 59% of the 423 Ligue 1 players.

€100k€750k€5M€30M€8MSee them in the Explorer →

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

Valued above 78% of the 2,065 defenders.

€20k€200k€2M€20M€8MSee them in the Explorer →

Where Kluivert 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).