Houston does not have a J-Star drone frame factory. The 4:05 PM ET release does not claim one either. It "highlights capital initiatives to fund planned U.S. expansion for drone frame manufacturing."
Read the verbs: highlights, fund, planned. None of them is built, opened or shipped.
$YMAT is +107.75% after hours. The float is about 3M shares and the market cap about $14M. The headline gives no dollar size for those capital initiatives, no timeline and no source for the money. It describes how a plan would be paid for. It does not describe a production line.
The stock's own record is a coin flip. On the 13 prior sessions where YMAT opened at least 5% higher, it closed below that session's open 54% of the time, with a median of -0.95%. Tonight's print is an after-hours move, not an opening gap, and Monday's open has not happened yet.
Then put the phone face down until Monday.