Ambarella is trading 4.74% higher at $66.11, with unconfirmed takeover speculation appearing to support the shares. - A report this week suggested Nvidia could join NXP Semiconductors and Qualcomm as a potential bidder; the speculation remains unconfirmed. - No new company announcement was identified for October 23. - Some chip stocks are rebounding after Thursday’s selloff, but semiconductor trading is mixed and the supplied sector context does not clearly explain Ambarella’s gain.