Samsung Electronics delivered one of the most striking earnings figures in its history and watched its share price fall anyway.
The South Korean technology group, the world's largest maker of memory chips, estimated second-quarter operating profit at 89.4 trillion won, about $58.44 billion.
That is a roughly 19-fold jump on the same period a year earlier, and more than the company earned in the previous three years combined.
Revenue rose 129% to 171 trillion won.
Yet the shares fell as much as 9% in early trading before recovering some ground, wiping tens of billions of dollars off the company's value.
The reaction looks contradictory, but the reasons are straightforward once the run-up to the results is taken into account.
Already priced in
The first is that the good news was already in the price.
Samsung shares have soared roughly fivefold over the past year, driven by an AI-fuelled surge in demand for memory chips that has pushed prices to record highs.
By the time the profit figure landed, the market had spent months pricing in a historic quarter.
The numbers confirmed that expectation rather than beating it by enough to justify further buying, so investors took profits instead.
A telling revenue miss
A second reason lies in the detail beneath the headline.
Samsung's revenue slightly missed some forecasts, which analysts attributed to more moderate price rises in DRAM, the conventional memory used in most computers and phones, than the market had assumed.
Investors have increasingly bet on structural, lasting strength in memory prices, so any sign of softer increases unsettles them.
The bigger worry
The third and most important reason is a growing unease about the durability of the boom itself.
The memory rally rests on enormous spending by American technology giants such as Meta, Microsoft, Amazon and Alphabet, which are pouring capital into AI data centres.
Analysts and investors are now openly weighing whether that phase of scarcity, in which chipmakers can name their price, is giving way to one of abundance.
If the largest cloud operators tighten their capital spending, as a recent Morgan Stanley note warned they might, demand across the AI hardware supply chain could weaken.
Delays to data-centre construction from labour shortages, power constraints or local opposition could have the same effect.
There is also concern that these companies may need to borrow heavily to fund infrastructure whose returns remain uncertain.
Knee-jerk or bubble?
So is the sell-off a knee-jerk reaction or evidence of a bubble deflating?
The most accurate answer is that it is largely the former, shaped by the latter fear.
Much of the fall is mechanical: profit-taking after a spectacular rally, amplified by leveraged trading through local exchange-traded funds that has made Samsung's shares unusually volatile.
Stripping out one-off bonus provisions, agreed in a wage deal that ties a share of semiconductor profits to worker pay, operating profit would likely have topped 100 trillion won.
That underlines how strong the quarter actually was.
The business fundamentals do not point to a bubble bursting; several analysts expect the memory shortage to deepen into next year as demand outpaces new capacity.
What has really changed
What the reaction does show is a shift in what investors are willing to reward.
After months of triple-digit gains, the market is no longer content with record profits alone and now wants evidence that AI spending will translate into sustained earnings growth.
Samsung's results were not weak; expectations had simply climbed higher than even a 19-fold profit rise could clear.
The sell-off is better read as a recalibration of those expectations than as the first crack in the AI trade.
