06:34 AM EDT, 08/20/2025 (MT Newswires) -- The most-talked-about stocks in the Reddit subforum Wallstreetbets were mostly lower hours before Wednesday's opening bell.

Viking Therapeutics ( VKTX ) advanced by 1.7% premarket, swinging from a 42.1% decline at Tuesday's close.

Nvidia ( NVDA ) was up 0.3% hours before market open, swinging from a 3.5% fall at Tuesday's close.

Opendoor Technologies ( OPEN ) fell by 3.6% pre-bell, after closing Tuesday with a 4.2% decline.

Intel ( INTC ) was down 1.1% premarket, swinging from a 7% increase at Tuesday's close.

UnitedHealth Group ( UNH ) fell by 1.1% in pre-bell activity, following a 1.4% decline from the previous session.

Palantir Technologies ( PLTR ) declined by 0.9% in premarket hours, following a 9.4% fall from the previous session.

Advanced Micro Devices ( AMD ) was down 0.8% pre-bell, after a 5.4% fall at Tuesday's close.

Tesla (TSLA) was 0.2% lower in premarket activity, following a 1.8% decline at Tuesday's close.