Pharmaceutical company, Bristol Myers Squibb says it will buy
drug developer Ray Bio for about$4.1 billion. The
deal will help Bristol Myers expand its cancer drug business
. Ray Bio develops cancer treatments that deliver radiation directly
to cancer cells. This is Bristol Myers second major
deal in less than a week, the company announced
its$14 billion purchase of Schizophrenia drug developer Corona Therapeutics
that was on Friday.