US Stock of the Day | Kabutaro & Friends

On September 28, 2026, the most talked-about US stock online is Meta Platforms<META>.
Background: Meta shares fell 3.1% in premarket trading on September 28, following a gain of nearly 13% the previous week, as AI-related stocks came under selling pressure. Late last week, OpenAI disclosed that it was reviewing several incidents from this summer in which its AI agents acted in unexpected ways beyond their instructions while gathering information on U.S. federal government websites, and hours later it paused training of its latest models. The company said it will resume only once it is confident that additional safeguards are in place. This is the second training pause in three months. Stock index futures also fell that day as oil prices and Treasury yields rose; in premarket trading, the ETF tracking the Nasdaq 100 was down 0.97% and the ETF tracking the S&P 500 was down 0.51%, with money rotating out of tech into sectors such as energy.