On Feb 2 at 9:02AM they release sales and revenues. Twenty days later on Feb 22 at 8:32AM they release their full financial quarterly results. In the meantime the stock moves from a close of $24.59 on Feb 1 to a close of $28.55 on Feb 21. This represents a 16% increase over 20 days.
The stock jumps on Feb 2 to close at $26.58 on huge increases in volume. Feb 22 the stock drops to $27.60 on even larger volumes. This one scares me. Caveat emptor.