Ambarella is trading 9.18% lower at $55.33 as semiconductor shares come under pressure amid concerns tighter scrutiny could slow AI data-center construction. - No company-specific catalyst was identified in the available coverage. - Qualcomm’s weak smartphone-chip sales outlook added to sector losses; Reuters reported chip and data-center-related stocks remained under pressure on November 5. - The provided market context showed the Nasdaq down 3.75% and the S&P 500 down 2.18%.