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

Energy Fuels (UUUU) rose by 12.4% in premarket activity, following a 16.9% rise from Monday's session.

MP Materials (MP) was 6.7% higher in pre-bell hours, after closing Monday with a 21.3% increase.

Bitfarms (BITF) advanced by 1.7% pre-bell, after a 28.3% increase from the previous session.

POET Technologies (POET) declined by 5.2% in premarket hours, swinging from a 10.5% increase at Monday's close.

UiPath (PATH) was 4.1% lower premarket, reversing a 0.5% increase from Monday's session.

Oklo (OKLO) was down 3.7% hours before market open, swinging from a 16.2% rise at Monday's close.

Rigetti Computing (RGTI) fell by 3% premarket, after closing Monday with a 25% rise.

Advanced Micro Devices (AMD) declined by 2% in pre-bell hours, reversing a 0.7% increase from the previous session.