Naomi Nix / Washington Post:
Internal documents show Instagram's aggressive campaign to win back teens, including by boosting teen-friendly influencers, adjusting its algorithm, and more  —  The company pursued a yearslong strategy to win teens back even after critics said it wasn't safe, records show.

Ben Schoon / 9to5Google:
A Google support page in Hindi says the company is rolling out an option to let users change their Gmail addresses while retaining all data and services  —  For quite some time now, Google has allowed users to change their account email address if they are using a third-party email address …

Rafe Rosner-Uddin / Financial Times:
The top 10 US tech billionaires collectively added $550B+ to their combined net worth in 2025, reaching $2.5T by December 24, up from $1.9T at the year's start  —  Elon Musk stays on top as Nvidia's Jensen Huang powers up the rankings on an AI-fuelled surge in fortunes

Reuters:
Chinese state media: China launches three VC funds of $7.1B+ each to back early-stage “hard technology” startups valued below ¥500M, or about $71M  —  China on Friday launched three venture capital funds to invest in “hard technology” areas, state broadcaster CCTV reported.

Marco Quiroz-Gutierrez / Fortune:
Cursor CEO Michael Truell warns that “vibe coding” advanced projects may create “shaky foundations” and eventually “things start to kind of crumble”  —  Michael Truell, cofounder and CEO of Cursor.STUART ISETT—FORTUNE  —  Cursor may utilize AI …