The most talked-about stocks in the Reddit subforum Wallstreetbets were higher hours before Tuesday's opening bell.

AST SpaceMobile (ASTS) rose by more than 7% in pre-bell activity, following a 10% rise from Friday's session.

BlackBerry (BB) was 10% higher premarket, after a nearly 19% increase from the previous session.

Micron Technology (MU) was up 6.3% premarket, after closing Friday with a 1.5% decrease.

Nvidia (NVDA) was up 1.4% hours before market open, swinging from a 1.9% decline at Friday's close.

Rocket Lab (RKLB) advanced by 5.7% pre-bell, continuing from the 8.2% rise at Friday's close.

Microsoft (MSFT) was 0.3% higher pre-bell, following a 0.1% fall from the previous session.

Nokia (NOK) increased by 0.8% in pre-bell activity, following a 9.1% rise from the previous session.

DTE Energy (DTE) gained by 2% premarket, adding to the 1.1% rise at Friday's close.