Stocks making the biggest moves midday: Biogen, Rivian, Bank of America, Airbnb & more

January 14, 2026

TL;DR

Biogen's stock fell more than 4% after warning of a $222 million pretax charge impacting net income.
Trip.com's stock plunged 17% following a Reuters report of a Chinese market regulator investigation.
Broad weakness in travel stocks, including Airbnb, Booking, and Expedia, was attributed to a potential China crackdown and fewer foreign visitors to the U.S.
Rivian shares declined over 8% after UBS downgraded the EV maker to 'sell' citing market enthusiasm for AI potential already being priced in.
Intuitive Surgical shares fell nearly 4% as the company forecast fewer da Vinci surgical robot procedures in 2026, despite reporting better-than-expected preliminary fourth-quarter revenue.
AppLovin's stock decreased more than 9% despite Evercore ISI initiating coverage with an 'outperform' rating.
Netflix is reportedly preparing a $72 billion all-cash bid for Warner Bros. Discovery's studios and HBO Max.
Wells Fargo shares dropped more than 5% after reporting weaker-than-expected fourth-quarter revenue and net interest income.
Bank of America's shares fell 5% despite reporting better-than-expected fourth-quarter earnings and revenue, driven by stronger net interest income.
Citigroup shares declined over 4% after reporting fourth-quarter adjusted earnings and revenue that surpassed analyst expectations.

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