NEW YORK — Apple’s blockbuster revenue growth is slowing drastically, as iPhone sales plateau and the company finds itself lacking revolutionary new products.

The company’s warning, issued Wednesday as part of its financial results for the holiday quarter, sent Apple’s stock plunging by more than 10 percent, wiping out a year’s gains.

Analysts said the warning suggested Apple can no longer sustain its growth without new products. Its last revolutionary creation, the iPad, was launched in 2010. Co-founder Steve Jobs, who was the engine behind the creation of the iPod, iPhone and iPad, died in 2011.

“It has been an overriding concern with Apple that they would not be able to generate revenue growth just rolling out new versions of old products,” said Jeff Sica, president and chief investment officer of SICA Wealth Management. “Now they’ve proven it in their numbers.”

On a conference call with analysts, Apple CEO Tim Cook rebutted that idea, but gave no details.

“We’re working on some incredible stuff,” he said.

Before he died, Jobs told biographer Walter Isaacson that he had figured out how to create a groundbreaking, easy-to-use TV set. Since then, company watchers have been waiting for Apple to bring something. Cook said the company was still working on it.

“I tend to believe that there’s a lot we can contribute in the space, and so we continue to pull the string and see where it leads us,” he said.

Fueled by earlier versions of the iPhone, Apple’s market capitalization decisively overtook that of Exxon Mobil in early 2012, making it the world’s most valuable company. With Wednesday’s drop, Apple is worth just 5 percent more than Exxon.