Information moves stock prices. A vast literature has arisen to exploit and explain that fact. Applied researchers in a variety of fields have used stock market reactions to assess public policy changes. Most of that research has assumed that the information is released on a small set of...

We investigate return patterns of lottery-type-stocks around FDA announcements regarding New-Drug-Applications (NDAs), Biological-Licensing-Applications (BLAs), and New-Molecule-Entities (NMEs). Focusing on post-event returns, we document negative abnormal returns (‘bio-run-down’) for the...