There is a figure that organises almost everything in this business, and it is worth keeping in mind before going further. The vast majority of player transfers can be explained by models built on performance and objective characteristics. Goals, assists, age, contract, minutes. Hard data that someone with a spreadsheet can predict without breaking a sweat. The football transfer market, that supposed playground of sheikhs and agents, turns out to be quite dull and predictable. Rational, even.
The problem is the remaining fraction. Statistics do not rule there. What rules there is the story someone decides to tell about a player. And that fraction, which looks marginal, is the one that drives headlines, inflates valuations and ruins budgets. The thesis is simple and a little uncomfortable. Hype does not add value, it front-loads it. It charges today for an expectation the pitch has not yet confirmed, and in many cases never will.
The counterintuitive part is that this portion is not distributed at random. It has rules, and the rules are psychological before they are economic. Sports economics has an elegant name for this: signalling theory. An unknown player appears at a World Cup, scores against an elite national team, and suddenly the entire market reinterprets everything it thought it knew about him. He has not improved in a week. What has changed is the power of the spotlight shining on him.
And here is the detail almost nobody wants to admit. The signal is not valuable in itself; it is valuable because of the opponent. Scoring against Argentina and scoring against Senegal are, on paper, the same goal. A ball crossing the line. But the perceived value they generate has nothing to do with each other, because public and media expectations are infinitely higher in the first case. The human brain runs on the availability heuristic, that habit of overvaluing what is recent and conspicuous. A goal in a World Cup final is burned into collective memory. A brace on a Tuesday against a modest opponent evaporates before the evening news.
That is why international tournaments are machines for manufacturing individual bubbles. They are amplifying showcases where an anonymous player suddenly shares the frame with the best on the planet. Poli and colleagues made it clear: a brilliant performance at a global event can send a player's expected value soaring. But the effect depends on context, and context is, essentially, who you shone against and how many people were watching. France wins in 2018 and Mbappé and Griezmann get another market label attached, even though they were already established stars. James Rodríguez in 2014, Lahm and Schweinsteiger in 2010. The tournament did not discover them, it certified them. And the market paid for the certification as though it were new talent.
The engine behind all of this is a cocktail of self-reinforcing biases. Confirmation bias pushes fans and social media to amplify any news that validates what they already wanted to believe — the young prospect who is going to take over the world — and to ignore anything pointing the other way. Frisby and Wanta defined it with surgical precision. Media hype occurs when coverage exceeds the real significance of the event. The media pump a player up, expectations inflate, and those expectations generate a pressure the footballer himself has to carry on his back. The overnight star arrives at the club already in debt to his own legend.
Alexis Sánchez at Manchester United is the instruction manual. Enormous media noise preceded the deal. Then reality arrived: five goals in forty-five matches. The expectation had completely distorted the valuation, and when the pitch sent the bill there was no narrative to cover it. Darwin Núñez at Liverpool, Antony at United. Mega-signings the subsequent performances never justified. Textbook cases of competitive bidding, where several clubs bid out of fear of missing out and end up overpaying. The winner's curse, they call it. You win the auction and discover you won it precisely because you were the one most wrong about the price.
The parallel with finance is not a pretty metaphor, it is structural. Neymar to PSG for 222 million in 2017 acted as a trigger. A single irrational purchase shook the entire market. In the seasons that followed, Premier League transfer spending surged, and one deal dragged all the others along, exactly as optimism spreads through a bubble before it bursts. Some also point to a shift in price trends with the arrival of Financial Fair Play, which, rather than cooling the market, may have contributed to an environment of excessive trading and rising prices. Institutional brakes, sometimes, accelerate.
It is worth being honest about the strongest objection, because it exists and it is a good one. If the bulk of the market is rational and modelable, talking about bubbles is an overstatement. Most transfers are grounded in solid fundamentals, and hype only affects a handful of noisy deals that dominate front pages but do not represent the bulk of the business. That is true. The football market is not a casino; it is a mostly predictable system with a speculative margin. But that margin is precisely the one that wrecks balance sheets, ties a club to an unpayable contract, and turns a promising young player into a toxic asset before he turns twenty-five. That margin is not much until it happens to you.
And there is a silent loser in all of this: the player who did similar things without entering the narrative. The striker at a modest club who scores a brace and nobody rewrites his value, because the public's attention was already taken up with someone at a big club. Same goal, different echo. Hype does not reward performance; it rewards the visibility of performance, and those two things are confused so often that almost nobody distinguishes them anymore. The market pays for the photo, not the move.
The next time an unknown player scores against a giant at a World Cup and his price triples in a week, remember that the player has not changed. What has changed is who was watching, and for how long they are going to keep doing so.
