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

Poet Technologies (POET) was up 8.5% in premarket activity, following a roughly 24% jump Tuesday.

Nebius Group (NBIS) rose by 2.7% in pre-bell hours, swinging from a 5.8% decline at Tuesday's close.

Advanced Micro Devices (AMD) was 1.5% higher premarket, following a 3.8% gain in the previous session.

Nvidia (NVDA) advanced by 0.6% pre-bell, reversing a 0.3% decline from Tuesday.

Tesla (TSLA) was up 0.5% premarket, swinging from a 4.5% decline at Tuesday's close.

Iren (IREN) was down 4% pre-bell, swinging from a 6.8% rise in the prior session.

Archer Aviation (ACHR) declined by 3.8% hours before market open, following an 8.5% fall Tuesday.

Opendoor Technologies (OPEN) fell by 1.1% in premarket activity, after closing Tuesday little changed.