Allbirds stock exploded over 600% on April 15, 2026. Shares hit $23 from under $3. The trigger? A pivot from sustainable sneakers to AI compute infrastructure. The once-hot footwear maker, public since 2021 at a $4 billion valuation, sold its brand and assets for $39 million last month. Now it’s rebranding as NewBird AI. A $50 million convertible note from an unnamed institutional investor will fund GPU purchases. The company aims to rent high-performance chips as a GPU-as-a-Service provider. No AI experience. Zero. Allbirds built wool shoes for tech bros. It closed U.S. full-price stores amid slumping sales. The investor relations announcement spells it out: buy GPUs, lease them out, compete with giants like CoreWeave or Lambda. Stockholders vote May 18. Approval needed for the shoe sale to American Exchange Group too. Markets love the hype. Trading volume smashed records. Retail traders piled in via Fidelity. Enterprise value ballooned to $140 million from $10 million. But skeptics see red flags.…