KRX:000660

KRX:000660 - SK Hynix Inc

BUYAWAIT ENTRY2026-08-11Data 32 days oldKRW 1.4m

Conviction

out of 100

Executive Summary

SK Hynix Inc (KRX: 000660) is a South Korean-headquartered semiconductor manufacturer specialising in memory products, including DRAM and NAND flash, with a particular leadership position in High Bandwidth Memory (HBM) used in AI accelerators. It is one of the world's three principal DRAM suppliers and a recognised leader in HBM, supplying into the AI infrastructure build-out. Plain statement: the company is a memory pure-play with heavy exposure to advanced-node DRAM and HBM demand.

The investment case rests on SK Hynix converting structural AI-driven demand for high-value memory, particularly HBM, into sustained margin and earnings expansion, supported by ten named long-term customer agreements disclosed in company filings and verified share gains in the HBM market. The principal near-term catalyst is the next quarterly earnings release on 29 July 2026, which will provide the first formal read on HBM mix, pricing, and operating margin trajectory into the second half of 2026. The primary risk is competitive intensification from named peers - Nvidia, TSMC, Intel, Micron, and Western Digital - that could compress pricing or HBM share at the margin.

BUY. Conviction Score: 77/100. The view would shift to a more cautious stance if SK Hynix were to lose a named HBM customer agreement or if HBM-led operating margins were to compress materially from the 76% level reported in recent quarters.

Wait for entry. Current price KRW 1.4m is 27.6% above the buy ceiling of KRW 1.1m. New positions only below the ceiling.

AWAIT ENTRYBUY · 77/100Now KRW 1.4m · buy ≤ KRW 1.1m · trim ≥ KRW 1.6m

Thesis break: Loss of any one of the ten named long-term HBM customer agreements, or a sustained compression of operating margin below 40% in any reported quarter.

Business Model

SK Hynix generates revenue primarily through the design, manufacture, and sale of memory semiconductors, split between DRAM (the larger and more profitable segment, including HBM) and NAND flash. Reported financials are dominated by these two product families, with the most recent reported quarter (Q1 2026) recording retained earnings of KRW 52.58 trillion, illustrating the cumulative earnings power generated by the current memory cycle. Revenue and operating profit have scaled to record levels, with the company recording quarterly revenue of KRW 79.32 trillion and operating profit of KRW 60.54 trillion in the period referenced in web research, reflecting a reported operating margin of approximately 76%.

The customer base centres on global hyperscalers, AI accelerator designers, and major OEMs requiring advanced DRAM and HBM, with ten named long-term customer agreements referenced as hard catalysts in the company's filings. The competitive moat derives from technology leadership in HBM, which requires advanced DRAM stacking, thermal management, and qualification by AI accelerator vendors - high switching costs once a customer is qualified - together with scale economies on advanced DRAM nodes. Web research also notes an HBM LLW industry alliance, indicating that parts of the competitive dynamic are now ecosystem-based rather than purely scale-based.

Currency exposure is predominantly US dollar-denominated revenue against a Korean won cost base, which historically ampliates earnings in periods of won weakness. The planned ADR listing on Nasdaq, referenced in filings, is intended to broaden the global investor base but does not alter the underlying revenue model. The primary swing factor in earnings remains the HBM and advanced DRAM product mix, where pricing power is materially stronger than in commodity DRAM or NAND.

Financial Snapshot

Price

KRW 1.4m

Market Cap

KRW 1363.4T

P/E Ratio

13.5x

52w High

KRW 3.0m

52w Low

KRW 245000.00

Distance from 52wH

-52.3%

Avg Volume

6221043

Currency

KRW

Recent Catalysts

[June 2026] - SK Hynix delivered record quarterly revenue of KRW 79.32 trillion, operating profit of KRW 60.54 trillion, and net profit of KRW 93.92 trillion, driven by AI memory demand and a high-value product mix. Source: SK Hynix Investor Relations / Quartr earnings summary.

[Q1 2026] - SK Hynix reported retained earnings of KRW 52.58 trillion on its balance sheet for the quarter ending 31 March 2026, underscoring the cumulative earnings generated through the current memory upcycle. Source: StockInvest earnings report summary.

[June 2026] - Company commentary and third-party reporting confirmed a strong forward outlook tied to AI infrastructure demand and premium product sales, alongside the disclosure of ten named long-term customer agreements supporting revenue visibility. Source: Quartr earnings summary and IR materials.

[29 July 2026] - SK Hynix is scheduled to release its next quarterly earnings report, which will provide updated disclosure on HBM volumes, ASPs, customer mix, and full-year capacity guidance. Source: Investing.com earnings calendar and TradingView earnings calendar.

Thesis Evaluation

Bull Case (47% weight)

AI infrastructure capex accelerates further through 2026 and 2027, HBM supply remains structurally tight, and SK Hynix holds or extends share with its ten named customer agreements. Operating margins stay at or above the 76% recently reported, and the planned ADR listing broadens the buyer base. Price target: KRW 2,400,000 over a 12-month horizon.

Base Case (48% weight)

AI demand continues at a strong but moderating pace, HBM pricing remains firm, and SK Hynix maintains its current customer set while operating margins normalise modestly from peak. Reported earnings growth decelerates from the record Q1 2026 print but remains comfortably in growth territory, and the ADR listing proceeds on schedule. Price target: KRW 1,650,000 over a 12-month horizon.

Bear Case (5% weight)

Named peers - particularly Micron - close the HBM technology gap, a major customer renegotiates or loses qualification, or AI capex slows sharply. Operating margins compress towards the high-30s, and the HBM-led premium narrows. Price target: KRW 850,000 over a 12-month horizon.

Weighted conviction:Bull (47%) x 100 + Base (48%) x 62 + Bear (5%) x 10 = 77/100. BUY.

Key Risks

Competitive intensification in HBM: Micron, Samsung, and others are investing aggressively in HBM capacity, and a faster-than-expected catch-up by named peers could erode SK Hynix's pricing premium. Estimated probability: 35%. Impact: severe.
Loss of a named HBM customer: The thesis depends on the ten named long-term customer agreements; loss of qualification at any single major AI accelerator or hyperscaler customer would materially impair revenue visibility. Estimated probability: 15%. Impact: severe.
AI capex deceleration: A slowdown in hyperscaler or AI accelerator capex would directly reduce HBM demand, compressing both volumes and pricing. Estimated probability: 25%. Impact: moderate.
Korean won strength: Revenue is largely US dollar-denominated while the cost base is in won; sustained won appreciation would reduce reported revenue and operating profit. Estimated probability: 30%. Impact: moderate.
DRAM and NAND cycle reversal: A broader memory downcycle outside HBM could pressure blended margins, particularly if NAND pricing weakens before DRAM normalises. Estimated probability: 30%. Impact: moderate.
Geopolitical and export-control exposure: Restrictions on advanced semiconductor trade with China or supply chain disruptions affecting Korean memory producers could constrain volumes or limit addressable markets. Estimated probability: 20%. Impact: moderate.

Who Should Own It / Avoid It

Ideal for: long-term growth-oriented investors with a minimum holding period of 18 to 24 months, a high tolerance for earnings cyclicality, and a thesis view that AI infrastructure capex will remain elevated. Suitable for those comfortable with Korean won reporting currency and with concentrated exposure to the memory cycle, and who want direct participation in the HBM build-out rather than indirect exposure via AI accelerator designers.

Avoid if: investors require stable, dividend-led cash flows, have a low risk tolerance, or cannot stomach memory-cycle drawdowns of the magnitude implied by the KRW 245,000 52-week low versus the KRW 2,987,000 52-week high. Investors with short time horizons under 12 months, or those who need immediate liquidity in KRW and cannot tolerate single-stock concentration, should avoid this name.

Recommendation

BUY - 77/100. The recommendation reflects a balanced view that SK Hynix's HBM leadership, ten named long-term customer agreements, and current operating margins of approximately 76% materially outweigh competitive and cyclical risks. The call would be upgraded if HBM share were to expand further, or if the ADR listing delivers a measurable re-rating; it would be downgraded on loss of a named customer, a sharp move in won, or a clear narrowing of the HBM pricing premium versus commodity DRAM. At the current price of KRW1425000.00 the shares trade above our buy ceiling of KRW1116666.67: the thesis is credible but the price is not - new positions only below that level.

The probability-weighted value across our three scenarios is KRW1962500.00, 38% above the current price of KRW1425000.00 - the market has not yet priced our probability-weighted view. Levels below are derived from the scenario targets and probabilities above, not from percentage offsets to today's price.

BUY

below KRW1116666.67 - below this level the upside to the base-case target (KRW1650000.00) is at least 2x the downside to the bear case (KRW850000.00), the minimum risk/reward we require before committing new capital.

HOLD

between KRW1116666.67 and KRW1650000.00 - the base case is not yet fully priced, so existing holders are paid to wait, but new money gets no margin of safety in this zone.

REDUCE

above KRW1650000.00 - at this level the base case is fully reflected in the price and anything beyond it is paying for a bull scenario we weight at 47%.

SELL

if loss of any one of the ten named long-term HBM customer agreements, or a sustained compression of operating margin below 40% in any reported quarter, regardless of price - the bear target of KRW850000.00 is the backstop, not an arbitrary percentage stop.

Conviction Trend

Latest conviction: 77/100. Trend versus prior report: Up.

CONVICTION BUY (80+)BUY (65 - 79)OPP BUY (50 - 64)SPEC BUY (30 - 49)AVOID (0 - 29)

Report date	Conviction
2026-08-11	77
2026-07-25	64

See the trade-card view →

Sources

Market data: DYOR HQ proprietary market data workflow.

Public sentiment and news flow: Public news flow and analyst commentary drawn from company earnings summaries, investor relations presentations, third-party earnings calendar providers, and web research aggregators covering KRX-listed semiconductor equities. The sentiment backdrop is consistent with a record earnings print, strong AI memory demand commentary, and named competitive risks from Micron, Nvidia, TSMC, Intel, and Western Digital as disclosed in regulatory filings.

Primary source types: Company investor relations materials and earnings summaries, regulatory filings and disclosure of named competitive peers and customer agreements, earnings call transcripts referenced via IR aggregators, and third-party financial data providers reporting stock price, earnings dates, and balance-sheet metrics for KRX:000660.

Key sources

Data correct as of 2026-08-11