FairValue

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

Fotheringham

RWScotland · St. Johnstone FC

№ 652672Emerging €540k −0.43

Player dossierPremiership

KaiFotheringham

RWRight WingerAttack

Club
St. Johnstone FC
League
Premiership
Nationality
Scotland
Age
22
Height
169 cm
Foot
Right
Valued
10 Dec 2025

Reading the valuation

The market values Fotheringham at €350k. Model A, which never saw Fotheringham during training, estimates €540k: the market value is 35% below that estimate.

That is a factor of ×1.54. 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 €1.2M, 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.

▼ −0.43A €540k▼ −1.21B €1.2M
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
20
Minutes
677
Goals
0
Assists
0
Started
6/20
Min / app
34
Cards
0Y 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 Fotheringham…

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 €350k

Checking API
EmergingEstablishedEliteWorld Class€2M€10M€30M€100k€1M€100MMarket €350kModel A €540k

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 1,583 attackers

Kai Fotheringham's percentiles among attackers: Goals per 90 3rd, Assists per 90 6th, Minutes, two years 8th, Starts 10th, Minutes, last 365 days 17th, European club minutes 63rd3rdGoals6thAssists8thMinutes10thStarts17thRecent63rdEurope

Dashed ring: the attacker median (50th percentile)

European club minutes

Share of minutes played in UEFA club competitions.

5% this player0% attacker median63rd percentile

0%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
€50k
Jan 2021
Peak
€375k
Jun 2024
Model target
€350k
Dec 2025
Valuations
12
1 club change
Dec 2025€350kSt. Johnstone FCValuation the model is trained to reproduce

Dec 2025: €350k, St. Johnstone FC. Dotted lines mark the €2M, €10M and €30M tier boundaries.

Show as a table
DateMarket valueClub
2021-01-18€50kDundee United FC
2021-06-28€75kDundee United FC
2021-12-31€100kDundee United FC
2022-06-27€100kDundee United FC
2023-03-22€200kDundee United FC
2023-06-26€200kDundee United FC
2023-12-05€350kDundee United FC
2024-06-21€375kDundee United FC
2024-12-03€375kDundee United FC
2025-06-17€375kDundee United FC
2025-10-09€350kSt. Johnstone FC
2025-12-10€350kSt. Johnstone FC

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
−0.433

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 →

Premiership311 players · median €400k

Valued above 45% of the 311 Premiership players.

€20k€150k€1M€7.5M€350kSee them in the Explorer →

Attackers, all leagues1,583 players · median €2.5M

Valued above 10% of the 1,583 attackers.

€20k€300k€5M€75M€350kSee them in the Explorer →

Where Fotheringham 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).