Drug wholesaler McKesson (MCK -2.5%) is one of the S&P 500's biggest decliners today, hit by...

|About: McKesson Corporation (MCK)|By:, SA News Editor

Drug wholesaler McKesson (MCK -2.5%) is one of the S&P 500's biggest decliners today, hit by a valuation downgrade to Equal-weight by Morgan Stanley. The firm says earnings look "flattish" next year due to fewer new exclusive generics, and any EPS growth would simply be the result of stock buybacks instead of meaningful sales. It adds that with no new catalysts over the near term, the upside looks limited.