Bayer Shares Tumble After Clinical Trial Failure, Loss in Roundup Case

Bayer shares fell sharply after the company stopped a late-stage study for a blood-thinning drug early because of lack of efficacy and was told to pay $1.56 billion in a lawsuit relating to its Roundup weedkiller.

Bayer said late Sunday that it discontinued a Phase 3 clinical trial to test its experimental drug asundexian for prevention of stroke and systemic embolism for patients with the heart-rhythm disorder atrial fibrillation.