How 37 banks became 4 banks in less than 20 years

‘Big Four’ is an idiomatic name for the four major banks in a number of countries. The entire banking industry is essentially monopolized by these four establishments. In Australia they are – National Bank of Australia, Commonwealth Bank, Westpac, Australia and New Zealand Banking Group. In the UK – Barclays, HSBC, Lloyds Banking Group and The Royal Bank of Scotland Group. And in the U.S the Big Four are Citi Group, JP Morgan Chase, Bank of America and Well Fargo.

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