06:35 AM EDT, 07/29/2025 (MT Newswires) -- The most-talked-about stocks in the Reddit subforum Wallstreetbets were mixed hours before Tuesday's opening bell.

Opendoor Technologies ( OPEN ) was up 2.1% pre-bell, swinging from a 7.9% fall at Monday's close.

Super Micro Computer ( SMCI ) was 1.6% higher premarket, following a 10.2% rise from Monday's session.

Advanced Micro Devices ( AMD ) advanced by 1.4% in premarket activity, after a 4.3% rise from the previous session.

Nvidia ( NVDA ) rose by 1.4% pre-bell, after closing Monday with a 1.9% increase.

Tesla (TSLA) was 0.3% higher in pre-bell hours, following a 3% increase from Monday's session.

UnitedHealth Group ( UNH ) declined by 2.6% hours before market open, reversing a 0.4% increase from the previous session.

enCore Energy (EU) was down 1.6% premarket, swinging from a 0.3% increase at Monday's close.

Alphabet (GOOG) was 0.1% lower pre-bell, after closing Monday with a 0.3% decline.