Álvarez, 26, has publicly expressed his desire to leave the Metropolitano, but the Madrid club have no intention of facilitating a move to a direct rival on anything less than their own terms. Barcelona have been told they will not receive Marc Casadó, Ferran Torres or any other player as part of a deal — cash only.
Barcelona currently lack the financial capacity to meet that figure, making the transfer contingent on significant player sales that would both raise funds and reduce the wage bill to comply with financial fair play requirements.
Arsenal represent a more realistic suitor. The Gunners could potentially construct an offer of around €70m plus Arsenal striker Viktor Gyökeres, a combination Atletico Madrid would consider — unlike anything Barcelona have to offer. For now, however, Álvarez is understood to have his sights set solely on a move to the Camp Nou rather than the Emirates.
The standoff leaves all three clubs in holding positions heading into the summer, with the Argentine's future unresolved and the price tag set by Atlético acting as the primary obstacle to any resolution.
Atlético's hardline stance reflects their awareness that selling a player of Álvarez's quality to a Liga rival at a discount would be indefensible to their supporters. The €150m figure may well be designed as much to discourage as to invite — but it also means that if Barcelona cannot raise the funds, a deal simply will not happen regardless of how strongly the player pushes for it.
That dynamic gives Arsenal a structural advantage they will be aware of. The Gyökeres component of a potential Arsenal offer addresses Atlético's desire for a proven striker to cover any departure, making the London club's path to the deal more credible than Barcelona's in the near term.