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

SpaceX (SPCX) was down 2.2% in premarket activity, following a 0.5% increase from Tuesday's session.

Micron Technology (MU) declined by 2.2% pre-bell, after a 1.7% fall in the previous session. Hundreds of workers at a Micron plant in Taiwan voted to strike following collapsed negotiations over bonus reforms, according to news reports.

Sandisk (SNDK) was down 1.9% hours before market open, following a 2.6% fall Tuesday.

Marvell Technology (MRVL) fell 1.5% pre-bell, after a 5.8% rise in the previous session.

Advanced Micro Devices (AMD) was 1.3% lower in premarket hours, swinging from a 2.8% increase at Tuesday's close.

Western Digital (WDC) declined by 1.2% premarket, after closing the pervious session with a 6.9% fall.

Nvidia (NVDA) was 0.2% lower pre-bell, swinging from a 0.1% increase at Tuesday's close.

Bucking the trend, Hertz Global Holdings (HTZ) advanced by 1.9% in pre-bell activity, following a 15% jump in the previous session.