FairValue

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  • EnvironmentOverviewWhat FairValue measures, what it found, where to go next.
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  • TerminalMarket LandscapeHow observed value is distributed, and where the model drifts.

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Álvaro

Carreras

LBSpain · Real Madrid

№ 811778World Class €63.6M −0.24

Player dossierLaLiga

ÁlvaroCarreras

LBLeft-BackDefender

Club
Real Madrid
League
LaLiga
Nationality
Spain
Age
23
Height
186 cm
Foot
Left
Valued
5 Jun 2026

Reading the valuation

The market values Carreras at €50M. Model A, which never saw Carreras during training, estimates €63.6M: the market value is 21% below that estimate.

That is a factor of ×1.27. 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 €33.9M, 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.

▼ −0.24A €63.6M▲ +0.39B €33.9M
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
87
Minutes
7,445
Goals
6
Assists
7
Started
83/87
Min / app
86
Cards
27Y 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 Carreras…

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 €50M

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €50MModel A €63.6M

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

Álvaro Carreras's percentiles among defenders: Goals per 90 76th, Assists per 90 73rd, Minutes, two years 99th, Starts 85th, Minutes, last 365 days 96th, European club minutes 90th76thGoals73rdAssists99thMinutes85thStarts96thRecent90thEurope

Dashed ring: the defender median (50th percentile)

Minutes, two years

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

7,445 this player2,860 defender median99th 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
€2M
Jul 2022
Peak
€60M
Dec 2025
Model target
€50M
Jun 2026
Valuations
13
5 club changes
Jun 2026€50MReal MadridValuation the model is trained to reproduce

Jun 2026: €50M, Real Madrid. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2022-07-01€2MManchester United
2022-10-27€2.5MPreston North End
2023-03-24€6MPreston North End
2023-06-01€7MManchester United
2023-12-22€7MGranada CF
2024-06-06€7MSL Benfica
2024-10-08€8MSL Benfica
2024-12-19€18MSL Benfica
2025-03-31€28MSL Benfica
2025-05-30€35MSL Benfica
2025-10-02€50MReal Madrid
2025-12-12€60MReal Madrid
2026-06-05€50MReal Madrid

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
−0.240

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 →

LaLiga509 players · median €4M

Valued above 96% of the 509 LaLiga players.

€100k€1M€10M€100M€50MSee them in the Explorer →

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

Valued above 98% of the 2,065 defenders.

€20k€200k€2M€20M€50MSee them in the Explorer →

Where Carreras 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).