Health-care companies rose amid deal intrigue.
Shares of Bristol Myers Squibb initially surged after reports that British rival AstraZeneca was preparing a blockbuster buyout offer.
Lantheus Holdings agreed to be acquired by Curium, a fellow radiopharmaceutical company controlled by investment firm CapVest Partners, for an initial $6.7 billion.
Two people have died in connection with the cyclosporiasis outbreak that has spread across the U.S. this summer, according to public-health officials in Michigan, marking the first deaths tied to the unusually large flare-up of the foodborne illness.
Investment firm KKR struck a deal to acquire medical-device outsourcing company Integer Holdings for about $4.3 billion in cash.
