The attention-grabbing hypothesis has been offered as a behavioural explanation for post-event abnormal returns for FDA drug approval announcements for NYSE listed firms. We show that when event-day mis-specification is accounted for the market reaction is centred on the event-day and that the...

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...