NY -- Standard&Poor's CreditWire 6/23/97 -- Standard&Poor's today has affirmed its triple-'B'-plus senior debt rating of Canadian-based Fairfax Financial Holdings LTD. (Fairfax) following the announcement that the company is acquiring 100% of the outstanding stock of Sphere Drake Holdings LTD. and its principal insurance subsidiaries Sphere Drake Insurance PLC and Sphere Drake Insurance (Bermuda) LTD. for a purchase price of approximately $221 million (CN$298 million). Total debt of $325 million (CN$438.8 million) is affected. At the same time, the triple-'B' claims-paying ability and counterparty credit ratings of Sphere Drake Insurance PLC and Sphere Drake Insurance (Bermuda) LTD are placed on CreditWatch with positive implications. These rating actions are contingent upon Fairfax's success in raising equity to