Apple Results to Give Clues on How Hard Memory Prices Are Biting

Apple Inc.’s stock is taking a hit as investors try to assess how much rapidly rising memory prices are eating into its bottom line. Investors will get a peek when the iPhone maker reports its earnings after the close Thursday.

Since hitting a high on Dec. 2, Apple shares are down about 10%, among the worst performers in the Magnificent Seven tech giants and one of the biggest drags on the S&P 500 Index in terms of points over that stretch. The stock is coming off its eighth consecutive down week, the last time it had a worse ...