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

Palantir Technologies (PLTR) was down 3.3% premarket, reversing the 1.4% gains from Monday's session.

Micron Technology (MU) advanced by 3.1% pre-bell, after a 6.3% increase from the previous session.

Sandisk (SNDK) was up 1.1% premarket, continuing from an 5.8% increase from the previous session.

Nvidia (NVDA) was 0.2% higher pre-bell, after a 0.02% gain at Monday's close.

Advanced Micro Devices (AMD) rose 1.9% in pre-bell activity, swinging from a 5.3% decrease from Monday's session.

SoundHound AI (SOUN) advanced by 1.4% hours before market open, reversing the 0.9% decline at Monday's close.

Nebius Group (NBIS) fell by 0.8% premarket, swinging from a 14.2% increase in Monday's session.

Microsoft (MSFT) was up 0.5% in premarket hours, after closing Monday with a 0.1% decline.