AI chip records meet a $20 billion revenue question

Samsung Electronics estimated on Thursday, 8 October 2026, that its third-quarter operating profit reached a record 107.4 trillion won, or $80.2 billion, up 782.5% from a year earlier. Sales were estimated at 195 trillion won, or $145.6 billion, up 127% year-on-year, implying an operating margin of about 55%. If confirmed, the profit figure would be the largest quarterly operating profit ever reported by a technology company, ahead of the $63.7 billion Nvidia booked in its latest quarter, and the first time a South Korean company has topped 100 trillion won in a quarter. It would also be Samsung's fourth record quarter in a row, and it beat the 106.1 trillion won analysts expected, according to LSEG data cited by Euronews.

The driver is memory. Samsung is one of the world's largest memory chipmakers, and AI data centres are buying high-bandwidth memory, the stacked chips that feed data to AI processors, while tight supply is pushing up DRAM and NAND prices. Taiwan's TSMC, the world's largest contract chipmaker, reported September revenue up 54.6% year-on-year at NT$511.86 billion, roughly $16 billion. That took estimated third-quarter revenue to a record NT$1.49 trillion, or $46.8 billion, up 51% year-on-year and 17.6% on the previous quarter, beating the top of TSMC's own guidance range of $44.6 billion to $45.8 billion. Taiwan's overall exports jumped 60.9% to a record $87.2 billion in September, and the island's GDP grew 12.9% in the second quarter.

Yet the same day, chip stocks sold off. The PHLX Semiconductor Index closed down 3.39% at 12,623.72 on Thursday after the Financial Times reported that OpenAI told investors its annualized revenue was approaching $50 billion at the end of September, about $20 billion below the roughly $70 billion figure several outlets had reported late last month. Coherent fell 9.63% to $302.35, Lumentum lost 5.62% to $1,048.60, Micron dropped 4.79% to $1,035.84, Broadcom fell 4.35% to $360.14, AMD lost 3.9% to $620.68 and Nvidia fell 2.94% to $230.48. Samsung's record forecast did not lift memory stocks, and its shares closed 2.42% lower at 262,000 won in Seoul while the KOSPI lost 2.62%.

The gap is largely definitional rather than a miss. Anthropic includes sales made through cloud partners such as AWS and Google Cloud in its annualized figure, while OpenAI does not, and the higher number came from investors trying to put the two on a like-for-like basis. OpenAI has told investors its revenue grew more than 70% over the period, so it did not fall short of anything it had promised. But the FT described annualized revenue as the most important indicator of overall AI demand, and that demand is what justifies the hundreds of billions being spent on infrastructure. The market treated the revision as a downgrade to the whole build-out thesis, not an accounting footnote.

The pressure is sharpest where contracts are largest. Oracle fell more than 5% on the news. Oracle signed a five-year, $300 billion cloud agreement with OpenAI in September 2025, which represents about 45% of its $664 billion in expected future contract revenue. Its latest results showed capital expenditure of $28.5 billion and negative free cash flow of $5.4 billion, and the Wall Street Journal reported the company is seeking more funding for AI chip development. Broadcom is working to arrange more than $50 billion in financing tied to the custom AI chips it is developing with OpenAI, with talks at an early stage with private credit firms including Apollo and Blackstone, per the Journal. The two companies plan to deploy 10 gigawatts of custom accelerators from the second half of 2026 through 2029.

Rates add a second layer of risk. A day after the Fed's September minutes showed most officials expecting another hike by year-end, Governor Christopher Waller said Thursday he anticipates additional increases if data come in as expected. Reuters noted the AI build-out has leaned heavily on debt, so rising rates could become a headwind. The selling extended beyond chips: Applied Digital fell nearly 2% at midday despite reporting fiscal first-quarter revenue of nearly $342 million, up 322% year-on-year, and Bloom Energy, a data-center power supplier, was down nearly 5% at that point. One exception was GlobalFoundries, which rose 2.68% to $49.36 after announcing a five-year, $2 billion deal to make silicon interposers for TSMC's CoWoS advanced packaging in Malta, New York, with production expected to begin in the first half of 2028.

The tension is straightforward: fundamentals at the chipmakers are extraordinary, but their valuations depend on demand from a small number of AI customers whose revenue is being estimated rather than audited. Thursday's move was a reaction to a reported figure, not to any change in company guidance, as Invested Alpha noted. The next real tests are scheduled: TSMC reports full third-quarter results and gives its outlook on 15 October, a day after ASML; Samsung publishes detailed figures on 29 October; and Nvidia reports in November. Until then, the difference between a $50 billion and $70 billion run rate will shape how investors read every AI headline.