Ambarella is trading at $64.32, up 4.30%, as the move appears to track a broad chip-sector rebound supported by strong semiconductor earnings and renewed AI optimism. - Lattice reported record quarterly revenue and upbeat guidance; chipmakers broadly advanced in Tuesday trading. - No new Ambarella-specific announcement explaining the November 3 gain surfaced in the search. Reports of exclusive NXP takeover talks date to October 30 and were not a fresh catalyst today.