Merrill Cites $1.4 Billion Exposure To Long-Term
Merrill Lynch & Co says it had $1.4 billion of financial exposure to Long-Term Capital Management; Merrill Lynch says it covered exposure by requiring hedge fund to provide cash and government bonds as collateral; Merrill Lynch is leading member of consortium of 14 big financial companies that injected $3.6 billion into hedge fund to stave off bankruptcy; Merrill says it participated in bailout because it feared that Long-Term Capital's collapse would damage world's financial system (M)