Deletion of Big Four (banking)

Comment: and the nominator deserves a |fish slap who has not stated why article should be deleted, also , this is a basic term in australia in a similar way that every ozzie knows that "Granny Smith|granny smith" is referring to an apple, and not someone's nanna, even gnews search knows this ie. entering "big four banks australia" brings back https://www.google.com.au/search?tbm=nws&ei=SCxRW5vIFprs8wXd65K4CQ&q=big+four+banks+australia&oq=big+four+banks+australia&gs_l=psy-ab.3..0.102532.103919.0.105263.6.6.0.0.0.0.267.503.2-2.2.0....0...1c.1.64.psy-ab..4.1.235....0.QRygYppTnWY many, many hits
Stance: keep
Cited policy: Wikipedia:Whacking with a wet trout (WP:TROUT||WP:AFDNOTCLEANUP)