55As regards, in particular, a contractual term providing, under a mortgage loan agreement, for that loan to be remunerated by interest calculated on the basis of a variable rate established, as in the case in the main proceedings, by reference to an official index, the transparency requirement must be understood as requiring, in particular, that an average consumer, who is reasonably well-informed and reasonably observant and circumspect, is in a position to understand the specific functioning of the method used for calculating that rate and thus evaluate, on the basis of clear, intelligible criteria, the potentially significant economic consequences of such a term on his or her financial obligations (judgment of 3 March 2020, Gómez del Moral Guasch, C‑125/18, EU:C:2020:138, paragraph 51 and the case-law cited).
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