⚠ The Cycle Has Not Been RepealedHigh threat

SK hynix (SKHY) — threat to the moat

Three years ago this company sold memory for less than it cost to make; the fabs, the engineers and the industry structure are the same ones.

A 76% operating margin1 is the most important number in SK hynix's results and the most misleading one, because the correct comparison is not to last quarter. It is to 2023.

Operating margin, through the last cycle15.1%20220%202323.4%202448.6%202576.3%Q2 20262023 was -23.6%: revenue ₩32,766bn against cost of sales ₩33,299bn.
The line has been below zero twice in a decade. Nothing structural prevents a third.

In that year SK hynix produced revenue of ₩32.77 trillion, an operating loss of ₩7.73 trillion and a net loss of ₩9.11 trillion2. The same company, the same fabs, the same engineers, three years earlier. Memory prices had fallen, and in this industry falling prices do not compress margins gradually — they invert them, because the cost base is almost entirely fixed and a fab does not care what its output sells for.

The mechanism that produces the next one is already running. All three DRAM producers are adding capacity, for the same reason, at the same time, on the same forecast. SK hynix is ramping M15X through 2026 and opening Yongin's first fab in early 20273. Capacity ordered during a shortage arrives during a surplus; this is not a prediction so much as a description of every previous memory cycle.

One thing is genuinely different, and it is not the order book — there isn't one4. It is the balance sheet: ₩87,958 billion of cash against ₩18,587 billion of borrowings5, where a previous bust would have forced capital spending cuts at precisely the wrong moment.

The falsifier is operating margin. Not its level — its direction over four consecutive quarters. Memory margins have never once compressed gently.

The number that tests this threat
Reported
2023 revenue against 2023 cost of sales
₩32,766B sold, ₩33,299B to make it

A gross loss before a single won of research or overhead, producing a loss for the year of ₩9,138 billion — the same company, the same fabs, three years before a 76% operating margin. All three producers are now adding capacity at once. Watch operating margin's direction over four consecutive quarters; memory margins have never once compressed gently.

Source: SK hynix Form 424B4 prospectus (10 July 2026) ↗
References
  1. ReportedAn operating margin near 76% in the second quarter of 2026.
    SK hynix Inc., preliminary results of operations for the second quarter of 2026 (SEC Form 6-K, 29 July 2026) — revenue W 79,318,746 million, up 50.9% on Q1 2026's W 52,576,287 million and 256.8% on Q2 2025's W 22,231,952 million; operating profit W 60,542,608 million, up 61.0% sequentially and 557.2% year on year, an operating margin of about 76%; profit before income tax W 122,708,355 million; profit for the period W 93,922,593 million. First-half 2026 revenue W 131,895,033 million, operating profit W 98,152,891 million and profit W 134,268,502 million. Prepared on a consolidated basis under K-IFRS and unaudited. — Q2 2026 (quarter ended 30 June 2026) · publ. 2026-07-29 · source ↗
  2. Reported2023 revenue of ₩32,766bn, an operating loss of ₩7,730bn and a loss for the year of ₩9,138bn.
    SK hynix Inc., Form 424B4 prospectus — consolidated income statements and management's discussion (SEC, CIK 2120882). FY2025: revenue W 97,147bn, cost of sales W 38,456bn, gross profit W 58,691bn, selling and administrative expenses W 5,019bn, research and development W 6,466bn, profit for the year W 42,948bn. FY2024: revenue W 66,193bn, gross profit W 31,828bn, R&D W 4,436bn, profit W 19,797bn. FY2023: revenue W 32,766bn, cost of sales W 33,299bn, a gross loss of W 533bn, an operating loss of W 7,730bn and a loss for the year of W 9,138bn, following a fall in memory prices from the third quarter of 2022. Q1 2026: revenue W 52,576bn, cost of sales W 10,897bn, gross profit W 41,679bn, R&D W 2,451bn, profit W 40,346bn. — FY2023-FY2025 and Q1 2026 · publ. 2026-07-10 · source ↗
  3. ReportedM15X ramps through 2026 and Yongin's first fab opens in early 2027.
    SK hynix Inc., Form 424B4 prospectus for its Nasdaq offering (SEC, CIK 2120882) — FY2025 revenue W 97,147bn, cost of sales W 38,456bn, gross profit W 58,691bn, S&A W 5,019bn, R&D W 6,466bn and profit for the year W 42,948bn, against FY2024 revenue W 66,193bn / profit W 19,797bn and FY2023 revenue W 32,766bn / cost of sales W 33,299bn / gross loss W 533bn / loss for the year W 9,138bn; Q1 2026 revenue W 52,576bn, gross profit W 41,679bn, profit W 40,346bn. IDC market shares for Q1 2026: second in DRAM at 29.1%, first in HBM at 56.4%, second in NAND at 18.5%, with the three DRAM producers together above 90% of revenue. DRAM products were 77.1% of total sales in 2025 and 77.3% in Q1 2026; NAND 21.3% and 22.0%. Competitors named: Samsung Electronics, Micron Technology and CXMT in DRAM; Samsung Electronics, Kioxia, Micron Technology and Sandisk in NAND; competitive factors listed as 'pricing; manufacturing costs, yields and product availability; product performance, quality and reliability'. First to develop HBM using TSV packaging, commercialised HBM3E in 2024 and developed HBM4 in 2025; HBM carried a per-gigabyte price premium of more than five times traditional DRAM in 2025. M15X cleanroom opened October 2025 with wafer input from Q1 2026; Yongin construction began February 2025 with the first fab's phase-one cleanroom expected Q1 2027; an advanced packaging plant (P&T7) is under construction in Cheongju and one is planned in Indiana for the second half of 2028. Intel's NAND business cost US$6.6bn in December 2021 plus US$2.2bn in March 2025, operated as Solidigm; NAND mass production is transitioning from 176-layer to 238- and 321-layer technologies. Gartner forecasts DRAM revenue of US$143bn in 2025 rising to US$401bn in 2027, HBM US$33bn to US$86bn and NAND US$68bn to US$341bn. A substantial portion of sales is attributable to a limited number of customers located in the United States and China; the two largest were 14.8% and 12.4% of revenue in Q1 2026 and the largest was 23.9% of revenue in 2025. The offering was 177,900,000 ADSs at US$149.00, each ADS one-tenth of a common share, representing 17,790,000 shares against 712,702,365 outstanding; Baillie Gifford, Coatue and Situational Awareness Partners indicated non-binding interest of up to US$7bn. — FY2023-FY2025 and Q1 2026 · publ. 2026-07-10 · source ↗
  4. ReportedThere is no order backlog based on long-term supply contracts.
    SK hynix Inc., semi-annual business report for the six months to 30 June 2026 (SEC Form 6-K, 18 August 2026) — 'The Company determines supply volumes and prices on a monthly and quarterly basis by mutual agreement with major customers, and there is no order backlog based on long term supply contracts.' Total equity W 262,693,228 million at 30 June 2026 against W 120,666,751 million at 31 December 2025; cash and cash equivalents, short-term financial instruments and short-term investment assets W 87,957,923 million against W 34,942,253 million; total borrowings W 18,586,634 million against W 22,247,905 million; debt-to-equity 32.80%, net borrowing ratio not disclosed because it is negative. For the six months to 30 June 2026, revenues of W 17,608,702 million (13.35%) and W 17,187,421 million (13.03%) were derived from external Customers A and B respectively; for the six months to 30 June 2025, W 10,890,639 million (27.31%) came from Customer A. IDC market share: DRAM 29.9% in 2023, 33.4% in 2024, 34.8% in 2025 and 29.1% in Q1 2026; NAND 19.6%, 21.4%, 20.9% and 18.5%. Gartner's world DRAM market: US$78.7bn in 2022 (-15.4%), US$49.9bn in 2023 (-36.5%), US$91.6bn in 2024 (+82.7%) and US$146.9bn in 2025 (+60.0%). Announced investments include approximately W 15 trillion for M15X in Cheongju, approximately W 19 trillion for the P&T7 advanced packaging plant and W 21,608.1 billion for Yongin, against long-term plans of roughly W 600 trillion for the Yongin cluster and W 100 trillion for Cheongju. The company developed the world's first 321-layer QLC NAND. China's State Administration for Market Regulation cleared the Intel NAND acquisition conditionally, obliging the group to maintain a reasonable pricing policy, increase production and support the entry of third-party competitors into the Chinese eSSD market for five years from December 2021. — six months to 30 June 2026 · publ. 2026-08-18 · source ↗
  5. Reported₩87,957.9bn of cash against ₩18,586.6bn of borrowings.
    SK hynix Inc., semi-annual business report for the six months to 30 June 2026 (SEC Form 6-K, 18 August 2026) — 'The Company determines supply volumes and prices on a monthly and quarterly basis by mutual agreement with major customers, and there is no order backlog based on long term supply contracts.' Total equity W 262,693,228 million at 30 June 2026 against W 120,666,751 million at 31 December 2025; cash and cash equivalents, short-term financial instruments and short-term investment assets W 87,957,923 million against W 34,942,253 million; total borrowings W 18,586,634 million against W 22,247,905 million; debt-to-equity 32.80%, net borrowing ratio not disclosed because it is negative. For the six months to 30 June 2026, revenues of W 17,608,702 million (13.35%) and W 17,187,421 million (13.03%) were derived from external Customers A and B respectively; for the six months to 30 June 2025, W 10,890,639 million (27.31%) came from Customer A. IDC market share: DRAM 29.9% in 2023, 33.4% in 2024, 34.8% in 2025 and 29.1% in Q1 2026; NAND 19.6%, 21.4%, 20.9% and 18.5%. Gartner's world DRAM market: US$78.7bn in 2022 (-15.4%), US$49.9bn in 2023 (-36.5%), US$91.6bn in 2024 (+82.7%) and US$146.9bn in 2025 (+60.0%). Announced investments include approximately W 15 trillion for M15X in Cheongju, approximately W 19 trillion for the P&T7 advanced packaging plant and W 21,608.1 billion for Yongin, against long-term plans of roughly W 600 trillion for the Yongin cluster and W 100 trillion for Cheongju. The company developed the world's first 321-layer QLC NAND. China's State Administration for Market Regulation cleared the Intel NAND acquisition conditionally, obliging the group to maintain a reasonable pricing policy, increase production and support the entry of third-party competitors into the Chinese eSSD market for five years from December 2021. — six months to 30 June 2026 · publ. 2026-08-18 · source ↗
Sources
Generated September 23, 2026