Key Highlights

  • SK hynix's US-listed shares jumped 13.3% to USD 164.70 on October 28, 2026 after the company reported quarterly revenue of 104.62 trillion won and operating profit of 83.33 trillion won.
  • Operating profit of 83.33 trillion won on revenue of 104.62 trillion won is a 79.7% operating margin, simple arithmetic on two reported numbers, extremely high for a manufacturer.
  • JPMorgan put the print 7% and 9% above consensus, while DRAM prices rose almost 30% and NAND prices about 25% from the prior quarter. These are secondhand accounts.
  • One recap cites quarter-on-quarter growth of 32% in revenue and 38% in profit, and another quotes 10.9% for the Korean line, so figures should be checked against the release.

What SK hynix Reported

SK hynix reported quarterly revenue of 104.62 trillion won and operating profit of 83.33 trillion won on October 28, 2026. Dividing profit by revenue gives a 79.7% operating margin, simple arithmetic on two reported numbers. The company's US-listed shares, referred to as an ADR in the material reviewed, rose 13.3% to USD 164.70. One recap states revenue grew 32% and profit 38% from the previous quarter. The Korean-listed line was quoted up 10.9% in another recap and 1.6% on October 29, so the US move should not be read as a single global price. The exact US ticker was not stated in the material reviewed, so none is shown here.

Why Memory Prices Drive the Result

Memory makers earn more when supply is tight and prices rise. JPMorgan said DRAM prices rose almost 30% and NAND about 25% from the prior quarter, and it put the results 7% and 9% above consensus on two measures. Demand from AI data centers is the common explanation, because accelerators need high-bandwidth memory and large pools of conventional DRAM. When prices climb faster than costs, margin expands sharply, which is how an operating margin near 80% becomes possible. Citi was also cited as commenting on the print. Margins like this reflect a price cycle as well as demand, and cycles in memory have reversed before, so the result shows where the market is now, not where it must stay.

Risks and What to Watch

The first risk is cyclical: memory prices can fall when supply catches up, and a margin near 80% leaves a long way down. The second is concentration in AI spending, which was under pressure on October 28 when Alphabet fell on negative free cash flow of USD 9.07 billion. Samsung Electronics, a rival, fell 5.4% on October 29 and the Kospi fell 2.2%, a reminder that Korean chip stocks swing both ways. Watch the October 29 open in the US, any analyst target changes, contract-price data for DRAM and NAND, and capital spending plans at SK hynix and its peers. Each of these could change the outlook quickly.

Where Things Stand

The 13.3% jump happened because SK hynix reported a 79.7% operating margin on higher memory prices and results above consensus. The US-listed shares reflect those numbers but are a single line of a Korean company. The margin is a reflection of a price cycle, and cycles can turn. The figures come from one recap quoting the company and from JPMorgan and Citi notes as cited. Watch the next price data, the follow-through in US trading on October 29 and capital spending commitments. Investors should treat the margin as a snapshot of a price cycle.