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June 7, 2021 · PDUFA decision

BIIB PDUFA decision: a positive outcome, +38.3%

On June 7, 2021, Biogen Inc. reached its PDUFA decision. The result was a positive outcome, and the stock moved +38.3% in the window around the event.

The move

$286.14
1d before
$395.85
Event day
$395.37
1d after
$396.64
5d after

Pre-catalyst setup

+4.4%
30-day run-up
2711%
30-day volatility