Tesla's Stock Had One of Its Best Days in Months. Here's Why It Popped

Tesla shares jumped nearly 8% on April 15, 2026 after CEO Elon Musk said the company reached the final step before mass production of its AI5 chip, boosting investor optimism about Tesla’s AI-driven vehicle, robot and data-center plans. The rally came amid broader positive catalysts: Intel said it would join a terafab project in Austin to help meet Tesla’s chip needs, and UBS upgraded TSLA to neutral from sell (with a $342 target). Despite the pop, Tesla remains down about 13% year-to-date and roughly 20% below December highs. Market reaction suggests the chip-development news and supply-chain support were the main near-term drivers of the price move.