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

Micron Technology (MU) was up 1.9% premarket, after a 0.2% increase at Thursday's close.

Nvidia (NVDA) advanced by 1.5% in premarket hours, following a 1.8% rise in the previous session.

Broadcom (AVGO) was 1.2% higher in pre-bell activity, swinging from a 2.7% decline at Thursday's close.

SpaceX (SPCX) was up 0.3% pre-bell, after a 6.4% increase in the previous session.

Lululemon Athletica (LULU) fell by 19% hours before market open, reversing a 1.4% increase at Thursday's close. The company overnight reported a decline in its fiscal Q2 results and cut its full-year outlook.

Zscaler (ZS) was down 3% premarket, after a 2.9% increase in the previous session.

Tesla (TSLA) declined by 2% pre-bell, swinging from a 5.4% rise at Thursday's close.

Robinhood Markets (HOOD) was 1.4% lower in premarket activity, after closing Thursday with a nearly 17% rise.