Apple’s (NASDAQ: AAPL) margin guidance for the holiday quarter wiped billions off its share price this week, even as the company reported record iPhone sales. Shares fell roughly 3% in after-hours trading on 2 November and extended losses to about 4.7% in premarket dealing the next day, touching $322.44, as first reported by Tradingpedia.

The number that mattered: Apple guided December-quarter gross margin to 45%-46%, down from 47.9% in the September quarter just reported, as first reported by Quartz. At the midpoint, that would mark Apple’s weakest margin since fiscal 2023’s fourth quarter.

A record quarter, beaten estimates

Apple’s fiscal fourth quarter was strong by most measures. Total revenue reached $114.5bn, up 12% year on year, according to the company’s 8-K filing with the SEC. Diluted earnings per share came in at $2.10, up 14%, including a $0.05 benefit from tariff refunds.

Both figures beat Wall Street. Analysts had expected EPS of $1.99 and revenue of $113.39bn, according to CNBC. iPhone revenue hit a September-quarter record of about $57.6bn, up roughly 17% year on year, as first reported by MacRumors. Greater China revenue rose 21%, also a quarterly record for the region. Full-year revenue reached an all-time company high of $479bn.

Not every line beat. Apple came up short of analyst estimates on iPad sales for the quarter, CNBC reported, a softer spot in an otherwise strong release.

Why the Apple margin guidance spooked investors

The gross-margin guidance overshadowed the beat because it signals rising costs just as the holiday shopping quarter begins. Apple cited higher memory-chip costs as the driver, according to Quartz. Memory components feed directly into the cost of iPhones, Macs and iPads, and a one-to-two-point margin hit on Apple’s scale translates into billions of dollars.

Services guidance added to the pressure. Apple guided December-quarter Services growth to 8%-9%, below the roughly 10.7% analysts had pencilled in, as first reported by Top1Markets. Services carries far higher margins than hardware, so a slowdown there compounds the hardware-margin squeeze rather than offsetting it.

Apple also disclosed that manufacturing and purchase commitments rose by $33bn, pushing total commitments to close to $90bn, according to The Crypto Basic. That increase points to heavier capital outlay tied to the same component-cost pressures flagged in the margin guidance.

A new chief executive’s first call

The quarter also marked the first earnings call for chief executive John Ternus, layering a leadership transition onto the margin story, MacRumors reported. Analysts at the Motley Fool have noted Apple trades at roughly 35 times expected earnings, a multiple that leaves little room for disappointment on margins going forward.

Trading activity reflected the shift in sentiment. The FINRA short-sale volume ratio for Apple stock rose from 0.433 on the day of the earnings release to 0.563 the following session, according to FINRA daily short-sale data, consistent with heavier bearish positioning as the stock fell. Broader markets offered little explanation for the move: the 10-year Treasury yield held steady at 4.91%, barely changed from 4.94% the prior session, according to data from the Federal Reserve Bank of St. Louis, suggesting the sell-off was company-specific rather than driven by a shift in rates.

By 4 November, Apple shares stood at $329.05, down 3.97% over the preceding 20 trading days, having traded as high as $352.05 and as low as $323.45 in that window, according to consolidated US exchange data. Trading volume ran 38% above its 20-day average.

What investors are watching next

The test now is whether Apple’s December-quarter results, when reported early next year, confirm the margin pressure flagged this week or show the company absorbing memory-cost inflation better than guided. Investors will also watch Services growth figures for signs of whether the 8%-9% guidance proves conservative or marks a genuine deceleration from the double-digit pace analysts had expected.

This article is for information only and is not investment advice or a recommendation to buy or sell any asset. Markets move quickly; figures are correct as sourced at the time of writing. Always do your own research before making financial decisions.

Written by

Martin Holloway

Martin Holloway spent the better part of two decades on bank trading floors in the City before he started filing copy. He read Economics at a redbrick university, joined a graduate scheme at one of the UK clearers in the late 1990s, and moved across to fixed income early in his career. The bulk of his time was on macro…