Bayer stock plunges after drug trial halted

Bayer stock plunges after drug trial halted Bayer (BAYRY) shares closed 17% lower on Monday after the company halted a trial for a blood-thinning drug due to "lack of efficacy." The news sent shares of Bristol Myers Squibb (BMY) lower because it's developing a similar drug. Also impacting Bayer shares is the news that the company was ordered to pay $1.56 billion in a lawsuit involving its Roundup weedkiller. Yahoo Finance Live breaks down the stock action. Click here to …