SK Hynix Plunges 15% in a Day: Broker Warns Q2 Operating Profit May Miss Consensus by 8%, HBM Long-Term Contract Pricing in Focus

South Korean memory chip titan SK Hynix suffered a brutal sell-off on Monday, with shares closing down 15.37% at 184,500 won (approximately $123.50), dragging South Korea's KOSPI index down 8.95% and triggering a circuit breaker, while also sparking a broad rout across Asian memory stocks. The trigger for this upheaval was a research report released that day by South Korean brokerage Korea Investment & Securities (KIS), which forecast that SK Hynix's second-quarter operating profit would "slightly miss market expectations."

KIS projected SK Hynix's second-quarter revenue at 80.9 trillion won and operating profit at 60.4 trillion won, representing sequential growth of 54% and 61%, and year-over-year surges of 264% and 556%, respectively. While these forecast figures are exceptionally strong on their own, the operating profit came in about 8% below the market consensus of 65 trillion won, instantly igniting investor unease.

Item (Q2 2026)	KIS Forecast	QoQ	YoY	Market Consensus
Revenue	80.9 trillion won	+54%	+264%	—
Operating Profit	60.4 trillion won	+61%	+556%	65 trillion won (~8% below forecast)
Operating Margin	74.6% (record high)	—	—	—
Blended DRAM ASP	+28.9% QoQ	Original assumption +50%	—	—
NAND Flash ASP	~+50% QoQ	—	—	—
Target Price / Rating	380,000 won / Buy	—	—	—

Note: KIS revised its Q2 blended DRAM ASP sequential growth assumption down from 50% to 28.9%, which directly drove the operating profit forecast reduction; the firm simultaneously cut its 2026 and 2027 operating profit estimates by 9% and 11%, respectively.

HBM Long-Term Contract Pricing: The Core Logic Behind the "Miss"

KIS detailed in its report the fundamental reason the profit forecast fell below consensus: SK Hynix's high-bandwidth memory (HBM) revenue mix is significantly higher than competitors, and its HBM products are typically priced under long-term supply agreements (LTAs). In an upcycle where traditional DRAM and NAND flash spot prices are surging, relatively fixed LTA prices prevent SK Hynix from fully and promptly capturing spot market price gains, causing its overall average selling price (ASP) growth to lag the market average.

This logic appears paradoxical—HBM, as a premium product, should theoretically be more profitable with a higher mix. But the crux lies in the differing pricing structures. KIS forecasts that DRAM and NAND flash ASPs rose approximately 30% and 50% sequentially in the second quarter, but SK Hynix's overall ASP growth was significantly dragged down by HBM contract prices.

KIS emphasized in its report that this earnings forecast reduction does not reflect concerns about performance, but rather a "realistic adjustment" incorporating signed LTA pricing assumptions into its model, and does not signal a slowdown in industry growth or deterioration in corporate profitability. The firm simultaneously cut its 2026 and 2027 operating profit forecasts for SK Hynix by 9% and 11%, respectively, but maintained its 380,000 won target price and "Buy" rating.

KIS further noted that with HBM4 expected to officially enter mass production in the third quarter of this year, SK Hynix's ASP growth is likely to return to market-average levels. The brokerage forecasts that SK Hynix's overall operating margin will reach a record 74.6% in the second quarter, and continue to climb sequentially thereafter.

Valuation Logic Reshaped: From Pricing Leverage to Earnings Sustainability

KIS argued in its report that as the memory industry shifts toward three-to-five-year long-term supply agreements, the core driver of corporate value will transition from "quarterly ASP growth magnitude" to "the duration for which high profitability can be sustained." While LTAs cap short-term pricing leverage, they also enhance earnings stability and reduce the memory industry's historically severe cyclicality. Future market valuation frameworks for memory companies will thus be reshaped, placing greater emphasis on earnings sustainability rather than short-term profit scale.

Multiple Factors Converge: Profit-Taking and Demand Peak Fears

Beyond the direct impact of the KIS report, market participants also pointed to other factors amplifying the selling pressure. SK Hynix had just completed its U.S. IPO the previous Friday (July 10), with its ADR surging nearly 13% on its debut, prompting some capital that had bet on the listing to take profits in the South Korean market.

The IPO itself was a landmark event in this year's global capital markets: SK Hynix priced at $149 per share, raising approximately $26.5 billion, making it the largest foreign company IPO in U.S. history, surpassing Alibaba's $25 billion record set in 2014, and globally second only to SpaceX's $85.7 billion listing in June this year; the offering was more than seven times oversubscribed. The ADR closed last Friday at a premium of about 15% over the Seoul-listed shares, a spread that created room for cross-market capital rotation and served as a technical catalyst for the sell-off in South Korean shares.

NH Investment & Securities senior analyst Ryu Young-ho noted that investors engaged in profit-taking following SK Hynix's U.S. listing, and that the market is also adopting a cautious stance ahead of second-quarter earnings. The analyst pointed out that investors had originally expected SK Hynix's HBM4 chip shipments to begin ramping up from the second quarter, but this increase does not appear to have materialized at scale.

A deeper concern lies in the possibility of a peak in the memory chip cycle. BNK Investment Securities had already cut its target price for SK Hynix to 185,000 won on July 8, assigning a "Neutral" rating, citing a potential slowdown in AI investment by major cloud service providers, weakening semiconductor demand momentum, and a possible inflection point in earnings momentum after year-end. Market worries about an impending industry capacity expansion wave and the sustainability of AI capital expenditure have already driven SK Hynix shares down approximately 38% from their all-time high set in June.

The divergence among brokerages is thus unprecedentedly stark:

Firm (Report Date)	Coverage	Stance	Key Data	Core Rationale
Korea Investment & Securities (7/13)	SK Hynix	Buy	Target 380,000 won	LTAs enhance earnings stability; Q2 operating margin of 74.6% hits record
BNK Investment Securities (7/8)	SK Hynix	Neutral	Target 185,000 won	Cloud provider AI investment may slow; earnings momentum inflection post-year-end
Kiwoom Securities (7/13)	Samsung Electronics	Target Cut	430,000 → 390,000 won	Rising component costs push up end-product prices, potentially backfiring on memory procurement
Daol Investment Securities (7/13)	Memory Sector	Leaning Bullish	—	AI cycle ongoing since April 2023; consensus estimates have room for upward revision before 2027; sees rally resuming in August
Leo Wealth	Industry Supply/Demand	Cautionary	—	Capacity expansion coinciding with weakening demand; supply-demand dynamics warrant vigilance

Notably, SK Hynix CEO Kwak Noh-jung stated last Friday that the memory chip shortage could persist beyond 2030. The true focal point of the bull-bear divide lies in whether AI capital expenditure can sustain this "super cycle" through to its conclusion.

Ripple Effects: Asian Memory Sector Under Broad Pressure

SK Hynix's plunge rapidly spread across the entire Asian memory sector. In the Hong Kong market, a 2x leveraged long SK Hynix ETF fell over 22% in a single day, while a 2x leveraged long Samsung Electronics ETF dropped over 13%. Samsung Electronics shares fell 10.7% on the same day. China's A-share memory concept stocks followed suit, with core names including GigaDevice, Ingenic Semiconductor, Longsys, and Biwin Storage all declining more than 7%.

Market / Instrument	July 13 Performance	Notes
SK Hynix (000660.KS)	-15.37%, closed at 184,500 won	~38% below last month's all-time high
Samsung Electronics (005930.KS)	-10.70%, closed at 25,450 won	Near two-month low
South Korea KOSPI Index	-8.95%, closed at 6,806.93	First close below 7,000 since May 6
South Korea KOSDAQ Index	-4.55%, closed at 799.36	Fell below 800 level
HK 2x Long SK Hynix ETF	>22% single-day drop	Leveraged ETF amplifies volatility
HK 2x Long Samsung Electronics ETF	>13% single-day drop	Leveraged ETF amplifies volatility
A-share GigaDevice, Ingenic, Longsys, Biwin	All down >7%	Memory concept stocks fell across the board

Note: The Korea Exchange activated a sell-side sidecar at 10:34 a.m., halting program trading for five minutes, and further triggered a circuit breaker at 1:28 p.m., suspending market-wide trading for 20 minutes—marking South Korea's seventh circuit breaker this year.

From a broader macro perspective, the memory semiconductor sector has been in a correction phase for roughly the past half-month, with some individual stocks down over 20%. Behind this lies a factor of global capital rebalancing within AI and across markets, including a "sell chips, buy cloud" sector rotation logic, as well as a phased rebound in the Hong Kong market attracting capital backflows. Additionally, according to the Korea JoongAng Daily, renewed geopolitical tensions in the Middle East and a weakening South Korean won on the day also amplified market risk-off sentiment.

Despite the severe market reaction, KIS's overall stance is not pessimistic. The brokerage believes that as the proportion of contract-based revenue increases and HBM capacity expansion squeezes overall supply, SK Hynix's high profitability levels can be sustained over the long term, and its valuation will be repriced accordingly. The 380,000 won target price implies more than 100% upside from current levels.

However, Aleksey Mironenko, Head of Global Investment Solutions at Leo Wealth, cautioned that SK Hynix's massive capital raise is aimed at expanding capacity, while buyers are also continuously innovating to reduce their consumption of memory and computing resources. This implies that industry demand may gradually weaken while the supply side continues to expand—a shift in supply-demand dynamics that warrants vigilance.

As of Monday's (July 13) close, SK Hynix shares stood at 184,500 won (approximately $123.50), cumulatively down approximately 38% from last month's all-time high. South Korea's KOSPI index closed at 6,806.93, with a single-day decline of 8.95%, providing the immediate backdrop for the year's seventh circuit breaker.