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It's that time of the transfer year again and where all the fans of their clubs are hoping to see their club bring in good reinforcements at good prices.

Since the biggest assets/investment of a club are its players, I decided to do an analysis where we will see if the players bought last season have appreciated or devalued.

In this analysis, I will only analyze some clubs from Premier League.

Premier League

Arsenal

Arsenal had an average performance of 59%, with the maximum devaluation of a player being 29% and the maximum appreciation of a player being 243%.

Chelsea

Chelsea had an average performance of -24%, with the maximum devaluation of a player being -67% and the maximum appreciation of a player being -20%, i.e., all contracted players were devalued.

Liverpool

Liverpool had an average performance of 46%, with the maximum devaluation of a player being -19% and the maximum appreciation of a player being 171%.

Man City

Manchester City had an average performance of 55%, with the maximum devaluation of a player being -35% and the maximum appreciation of a player being 200%.

Man United

Manchester United had an average performance of -12%, with the maximum devaluation of a player being -43% and the maximum appreciation of a player being 47%.

Tottenham

Tottenham had an average performance of -6%, with the maximum devaluation of a player being -38% and the maximum appreciation of a player being 39%.

We can conclude that Chelsea was the club that had the worst performance in last season's contractions.
The best performance was Arsenal, having managed to value a player by 243%.