Social Buzz: Wallstreetbets Stocks Advance Premarket Tuesday; MongoDB, Reddit to Open Higher

06:43 AM EDT, 09/29/2026 (MT Newswires) -- The most-talked-about stocks in the Reddit subforum Wallstreetbets were advancing hours before Tuesday's opening bell. MongoDB (MDB) rose 1.6% premarket, swinging from an 18.5% decline at Monday's close. The company said Chief Executive and President Chirantan CJ Desai is stepping down from his roles, effectively immediately, in order to pursue a senior role at Meta Platforms. Reddit (RDDT) advanced by 2% pre-bell, after closing Monday with a 4.5% fall. Micron Technology (MU) was up 1.6% in premarket hours, swinging from a 2.6% decline at Monday's close. Nvidia (NVDA) was 0.8% higher premarket, after a 1.7% increase from the previous session. Advanced Micro Devices (AMD) advanced by 1.1% just hours before market open, after closing Monday with a 3.6% decline. SpaceX (SPCX) rose 1% in pre-bell activity, following a 2.2% decline from Monday's session. Meta Platforms (META) advanced by 0.5% pre-bell, swinging from a 4.8% fall at Monday's close. Tesla (TSLA) was 0.3% higher in premarket hours, after a 3.9% decline from the previous session.