A court appeal by Apple for the temporary suspension of an antitrust judgment on its electronic book pricing has been refused.
The judge held that Apple had violated antitrust laws by conspiring with publishers to raise electronic book prices in 2010.
US District Judge Denise Cote held that collusion had continued even after her findings.
She noted that the publishers and Apple seemed to express together their opposition to some government recommendations, "reflecting a seriously continuing danger of collusion."
The judge held in July that Apple had conspired with publishers to spoil the $9.99 e-book price Amazon.com had established.
The court believed that Apple had joined five major book publishers to gang up on Amazon to the detriment of consumers.
Apple has denied it did anything wrong, even as the book publishers involved in the case settled to avoid going to trial.
The case uncovered that e-book prices rose after Apple signed with publishers so-called agency agreements.
The move meant publishers rather than retailers set the prices for each title.