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

Nvidia (NVDA) fell by 10.6% in premarket hours, following a 3.1% decline from the previous session. Nvidia and other technology stocks were down sharply in Monday's pre-bell activity after Chinese artificial intelligence startup DeepSeek released an open-source AI model that it said can run on less sophisticated chips.

Advanced Micro Devices (AMD) declined by 6.2% pre-bell, after closing Friday with a 0.2% fall.

Microsoft (MSFT) was 6.2% lower in premarket activity, following a 0.6% decline at Friday's close.

Palantir Technologies (PLTR) was down 5.6% in pre-bell hours, after closing unchanged on Friday.

MicroStrategy (MSTR) fell by 4.9% hours before market open, following a 5.2% decline from Friday's session.

Tesla (TSLA) was 4.5% lower premarket, following a 1.4% decline at Friday's close.

Apple (AAPL) was down 0.6% pre-bell, after closing Friday with a 0.4% fall.

Antero Midstream (AM) was 0.1% lower premarket, following a 1.1% fall at Friday's close.