US Stock Market Most Popular Stocks Today (Dec. 11, 2025): Oracle Crash, Disney–OpenAI AI Deal, PetMed Buyout Buzz
As the closing bell rang on Wall Street this Thursday, December 11, 2025 (around 4 p.m. ET), investors were left staring at one of the most dramatic “rotation” days of the year. The big story: Oracle’s shock AI spending plans blew a hole in the AI trade, even as Disney’s $1 billion investment in OpenAI stole the headlines on the upside. In the “most active” column, traders piled into names like Oracle (ORCL), Nvidia (NVDA), PetMed Express (PETS), HeartBeam (BEAT) and Plug Power (PLUG), alongside a pack of ultra‑volatile microcaps. ChartMill+1 Below is a stock‑by‑stock breakdown of the most popular U.S. stocks today, what moved them, and what traders are watching