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

Micron Technology (MU) advanced by 5.3% pre-bell, reversing a 2.6% fall from Monday. Micron said it started construction on a high-tech wafer production site within its current manufacturing center in Singapore.

Intel (INTC) was 2.2% higher premarket, after a 5.8% fall in the previous session.

Rocket Lab (RKLB) rose by 1.7% in pre-bell hours, following a 9.5% drop Monday.

Apple (AAPL) was 1% higher pre-bell, after a 3% rise in the previous session.

Nvidia (NVDA) was up 0.6% hours before market open, swinging from a 0.6% decline at Monday's close.

Tesla (TSLA) advanced by 0.6% premarket, after closing Monday with a 3.1% decrease.

Meta Platforms (META) was 0.4% higher in pre-bell activity, following a 2.1% rise in the previous session.

Bucking the trend, UnitedHealth Group (UNH) fell by 12% in premarket hours, following a 1.3% decline from the previous session. UnitedHealth reported a year-over-year decline in Q4 adjusted earnings and issued a downbeat 2026 revenue outlook Tuesday.