AT&T's failed deal for T-Mobile shines a spotlight on the tougher antitrust climate
, placing "a very firm marker that [the U.S. government is] taking antitrust enforcement very seriously." Next big deal to watch
: the proposed $29B merger of Express Scripts (ESRX +3%
) and Medco (MHS +2%
); the latter's shares are up today but trade ~16% below the value of the ESRX offer.