On October 27, 2017, the share price of McKesson Corporation and two other major US pharmaceutical distributors dropped by 7-12 per cent over only a few days. The stock price drop was fuelled by reports that Amazon Inc. had quietly acquired wholesales pharmacy licences in 12 US states and, a short time later, formed an independent venture with Berkshire Hathaway Inc. and JP Morgan Chase & Co. to improve the cost and quality of health care for the US employees of all three companies. These two notable events in the US pharmaceuticals market did not go unnoticed by a group of students enrolled in a value investing class, who wondered if it was possible for Amazon Inc. to disrupt the US health care industry, or if the market was overreacting to the two reports. Was McKesson Corporation's future in the pharmaceutical distribution business in jeopardy, or was its stock suddenly in a favourable buy position?

Student spreadsheet to case W20488