By Agence France-Presse
Apple skidded 6.6 percent to close at $207.48. That left the valuation right at $1 trillion, after briefly slipping below the milestone it topped in August.
The firm said net profit climbed 32 percent to $14.13 billion on revenue that was up 20 percent to $62.9 billion with help from growing sales of digital content and services to users and other Apple gadgetry.
However, the market was disappointed that Apple fell short of expectations, with sales of 46.9 million iPhones and a forecast for the key holiday season that was not as robust as anticipated.
"Apple will have trouble maintaining its recent valuation bump if the market clearly sees declines in shipments," said analyst Richard Windsor on his Radio Free Mobile blog.
Other analysts said the outlook remains positive for Apple as it diversifies its revenue base with more services such as streaming music and Apple Pay, and moves toward the launch of a video service that could compete with Netflix.
"Services revenue continues to increase at pace," said Neil Saunders of the research firm GlobalData.
"We believe this represents a massive forward opportunity for Apple and, as such, welcome the news that the company is looking into streaming video services."