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

Rocket Lab (RKLB) was down 3.9% premarket, swinging from a 6.8% increase at Thursday's close.

Micron Technology (MU) declined by 3..5% hours before market open, after a 3.4% fall from the previous session.

POET Technologies (POET) fell by 3.5% pre-bell, after closing Thursday with a 43.2% rise.

Applied Materials (AMAT) was 3.2% lower in premarket activity, reversing a 0.9% increase from Thursday's session.

Nvidia (NVDA) was down 2.6% premarket, swinging from a 4.4% rise at Thursday's close.

Sandisk (SNDK) was 2.4% lower in pre-bell hours, following a 4.5% decline from the previous session.

Tesla (TSLA) fell by 2.2% premarket, after a 0.4% decline at Thursday's close.

Bucking the trend, Microsoft (MSFT) was up 0.1% in premarket activity, following a 1% increase from Thursday's session.