Netflix shares fell more than 6% in premarket trading on October 21, 2026, after the company lowered revenue guidance for its advertising-supported tier. The revision overshadowed a strong third-quarter earnings report, in which Netflix exceeded profit expectations.
The company cited a slower-than-anticipated ramp-up in ad sales and greater competition in the digital ad market as reasons for the change. The market reaction reflects investor concerns about the long-term monetization of streaming services that increasingly rely on advertising for growth. It also raises concerns that ad-market challenges could weigh on other major players in the communication services sector as they expand their ad-supported offerings.