Universe Pharmaceuticals ($UPC) closed the week with a massive 180% spike after announcing a patent portfolio acquisition. On paper, it looks like a breakout. In reality, it is a $1M market cap entity with a 3M float.
Out of 2,881 historical instances of catalyst-driven gap-ups of 30% or more, only 34% managed to close green. The other 65% of the time, the gap faded into a red close, yielding a median intraday return of -6.79%. Even $UPC's own historical gap history shows a mean loss of -5.84% on gap-up days.
Buying these after the open isn't trading; it's a lottery ticket with bad odds. 65% of them fade to red. Remember that before Monday's open.