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

Rocket Lab (RKLB) advanced by 1.4% premarket, following a 0.5% increase from the previous session.

Nvidia (NVDA) was up 0.1% pre-bell, swinging from a 0.4% decline at Tuesday's close.

Tesla (TSLA) was 0.1% higher premarket, following a 1.1% decline from the previous session.

Nebius Group (NBIS) fell by 1% hours before market open, after a 1% decline at Tuesday's close.

Oklo (OKLO) declined by 0.8% in premarket hours, after closing Tuesday with a 3.3% fall.

Robinhood Markets (HOOD) was down 0.5% premarket, following a 1.7% fall from the previous session.

Micron Technology (MU) was 0.2% lower pre-bell, after a 0.6% decline from Tuesday's session.

Amazon.com (AMZN) fell by 0.2% premarket, swinging from a 0.2% increase from Tuesday's session.