New Delhi, July 24 -- Here's the good news: The Hershey Co. says it's not raising prices for Halloween candy this year.

But here's the bad news: Hershey and other chocolate makers are continuing to hike prices, saying a volatile cocoa market gives them no choice.

Hershey, the maker of Reese's, Whoppers, barkThins and other chocolate candies, said Wednesday that it will be raising U.S. retail prices later this fall. In some cases, pack sizes will get smaller; in others, list prices will rise. The average price increase will be in the low double-digit percentages.

"This change is not related to tariffs or trade policies. It reflects the reality of rising ingredient costs including the unprecedented cost of cocoa," Hershey said in a state...