South Korea's financial services regulator has asked major commercial banks to prepare around $4 billion in financing to support a credit cooperative hit by customer withdrawals, two banking sources familiar with the matter said on Monday. An official at the Financial Services Commission confirmed that banks had been asked to prepare liquidity through repurchase-agreement facilities to aid MG Community Credit Cooperatives, but did not comment on the amount. Depositors were lining up last week to withdraw funds from a branch of MG Community Credit Cooperatives after local media reported ...