Tesla stock today: TSLA slides as supplier slashes a $2.9 billion battery deal to $7,386
NEW YORK, December 30, 2025, 02:35 ET — Market closed Tesla shares fell 3.3% to $459.64 in Monday’s regular session. South Korean battery-materials maker L&F said the value of its 2023 deal to supply Tesla and its affiliates with high-nickel cathode materials — a key ingredient in a battery’s positive electrode — from January 2024 through December 2025 has shrunk to $7,386 from an earlier projection of $2.9 billion. Sources and analysts linked the deal to Tesla’s in-house 4680 cells, and Samsung Securities analyst Cho Hyun-ryul said weaker electric-vehicle (EV) demand and production-yield issues — how many usable cells come