	first boston fbc swiss affiliate boosts stake first boston the swiss affiliate of first boston inc said it raised its stake in the company to shares or pct of the total from shares or pct in a filing with the securities and exchange commission financiere credit suisse said it bought first boston common shares between feb and at prices ranging from to dlrs a share or mln dlrs total it said it bought the shares as part of an agreement to raise its minority stake in first boston to pct the same stake level first boston holds in financiere credit suisse reuter 
