The result was keep. (non-admin closure) Lourdes 12:56, 23 July 2018 (UTC)
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Seems to be mostly a UK-bank specific term that the original author has tried to extend to every single country. Most of the countries on this list don't have a "big four" or the term is not used there. I don't see the scope of this article. Mostly duplicating List of largest banks, proposing some merge into there. – Craig Davison (talk) 12:47, 16 July 2018 (UTC)