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

Advanced Micro Devices (AMD) was 2.4% higher in premarket activity, after closing Monday with a 1% increase.

Tesla (TSLA) advanced by 2.4% in pre-bell hours, following an 8.2% increase from the previous session.

Hims & Hers Health (HIMS) rose by 2.3% premarket, swinging from a 34.6% fall at Monday's close.

Alphabet (GOOG) was up 1.3% in pre-bell activity, reversing a 1% decline from the previous session.

UnitedHealth Group (UNH) advanced by 0.4% hours before market open, reversing a 0.4% decline from the previous session.

Circle Internet Group (CRCL) was down 2.3% in premarket activity, swinging from a 9.6% rise at Monday's close.

Rocket Lab (RKLB) declined by 1% in pre-bell hours, after closing Monday with a 9.1% increase.

AST SpaceMobile (ASTS) was 0.3% lower pre-bell, following a 9.3% rise at Monday's close.