Issue number 273 of Weekly Post presents the top 50 transfer values for players currently on loan in big-5 league teams. At the head of the table is Philippe Coutinho. However, the price for the Brazilian as estimated by the CIES Football Observatory algorithm (€96.5M) is lower than the option to buy negotiated between Bayern and Barcelona (€120M).
Four other players on loan have an estimated value greater than €50M: Dani Ceballos, Martin Ödegaard, Harry Wilson and Mauro Icardi. While there is in principle no option to buy for the three former players, Paris St-Germain can sign Mauro Icardi for €70M. This is currently a relatively high fee, but it could be no more the case if the Argentinean goes on playing and scoring as he managed to do in October.
With regard to Stefano Sensi and Duván Zapata, the levels of their options to buy are already significantly lower than the estimated values. Inter and Atalanta will probably not hesitate to exercise them. More information on the exclusive CIES Football Observatory approach to assess on a scientific basis the transfer value of professional footballers is available here.