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

Sandisk (SNDK) was up 4.1% in pre-bell activity, after closing Friday with a 4% decline.

Micron Technology (MU) advanced by 4.1% premarket, reversing a 0.5% decline from the previous session.

AST SpaceMobile (ASTS) was 2.6% higher pre-bell, after a 5.1% increase from Friday's session.

SpaceX (SPCX) rose by 1.9% hours before market open, swinging from a 5.4% decline at Friday's close.

DTE Energy (DTE) was up 1.1% in premarket activity, following a 0.5% decline from the previous session.

Nvidia (NVDA) advanced by 0.7% pre-bell, after a 2.2% decline from Friday's session.

Alphabet (GOOG) was 0.5% higher in premarket hours, swinging from a 2.2% fall at Friday's close.

Microsoft (MSFT) declined by 0.4% pre-bell, after a 1.8% fall at Friday's close.