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April 26, 2023 · earnings

ALKS earnings: a negative outcome, -7.0%

On April 26, 2023, Alkermes plc reached its earnings. The result was a negative outcome, and the stock moved -7.0% in the window around the event. It had already run +8.8% in the 30 days into the catalyst — the kind of pre-event run-up that often precedes binary readouts.

The move

$28.40
1d before
$26.42
Event day
$26.38
1d after
$26.66
5d after

Pre-catalyst setup

+8.8%
30-day run-up
2400%
30-day volatility
2.2×
volume spike