After SK Hynix's IPO surged and then plummeted, is the memory supercycle reaching a temporary peak?

Global HBM core leader SK Hynix completed its ADR listing on NASDAQ, with its stock price surging 12.76% on the first day of trading, setting a record for recent overseas chip companies' U.S. IPO gains. On the listing day, the company's CEO publicly expressed long-term optimism: the world will face the most severe memory chip shortage in history in 2027, and the tight supply-demand balance in memory will persist beyond 2030, injecting a strong long-term positive outlook into the market.

I. Complete Event Review: A Listing Market of Extreme Contrasts

Optimism lasted only two trading days before the market experienced an extreme reversal: SK Hynix's domestic Korean stock plunged 15.37% in a single day, marking the largest single-day drop in nearly 20 years; its U.S. ADR fell 9.3% in sync, nearly wiping out all the gains from the listing day. Panic quickly spread to the global memory industry chain, with Micron and Western Digital also declining significantly. The Philadelphia Semiconductor Index closed down 3.6% for the day, with the entire sector weakening collectively.

The core contradiction behind the dramatic market divergence became clear: corporate management firmly remains bullish on post-2027 computing power and memory demand, while secondary market capital is already pricing in the risk of oversupply from global manufacturers' collective capacity expansion. The divergence between bulls and bears has erupted completely, leading to severe valuation volatility in the memory sector.

II. Deep Dive into Core Bull and Bear Logics

Bull Logic: HBM's Long-term Demand is Inelastic, 2027 Shortage Has Fundamental Support

1. Continuous AI Computing Expansion Drives HBM's Inelastic Demand
Global large models, AI agents, and supercomputing cluster construction are accelerating. High-end HBM is an essential companion to GPU computing power, with HBM usage per AI server being several times higher than traditional servers. Meta, NVIDIA, and major cloud providers continue to ramp up computing infrastructure investment. HBM order lock-in periods have extended to 2027-2028, indicating strong certainty for high-end memory demand.
2. Capacity Expansion Faces Technical Barriers, Supply Release is Slow
HBM production requires advanced processes, high-end packaging, and high-purity wafer support. Building new production lines and expanding capacity takes 2-3 years. Even if Samsung and Micron simultaneously expand high-end memory production, effective new supply before 2027 will be limited and difficult to match the incremental demand from the AI computing boom, creating a natural supply lag in the industry.
3. Memory Industry Capital Expenditure Remains Cautious
After the deep downturn cycle of 2022-2023, the three major memory manufacturers have significantly cut capital expenditure on standard DRAM and NAND. They will not expand capacity indefinitely across the board. While low-end memory faces oversupply, capacity deployment in the high-end HBM segment remains restrained, leading to long-term structural tightness.

Bear Logic: Short-term Capacity Expansion Materializes, Market Prices in Supply Pressure Early

1. Concentrated Release of General Memory Capacity Suppresses Short-term Profits
Currently, Samsung, Hynix, and Micron are simultaneously restarting mature process expansion. Capacity for standard DRAM and consumer-grade NAND continues to come online. However, the recovery speed of demand from consumer electronics and traditional servers lags behind the supply increase, slowing the upward momentum of general memory prices and suppressing companies' short-term gross margins.
2. Capital Trading "Buy the Rumor, Sell the News"
The memory sector has been in a cyclical upturn since 2024, with significant gains. Stock prices have already largely priced in the 2026 memory price increase expectations. Hynix's listing is a case of "good news is priced in," prompting capital to take profits and exit at high levels. Coupled with market concerns about concentrated capacity release post-2028, long-term oversupply expectations are weighing on valuations.
3. Risk of Phased Slowdown in AI Demand
If global tech giants slow down their capital expenditure pace, or if the commercialization of AI applications falls short of expectations, leading to reduced budgets for computing hardware procurement, it would directly weaken the medium-to-long-term demand elasticity for HBM. The market is already anticipating this pessimistic scenario.

III. Structural Differentiation Opportunities in Sub-sectors

1. High-end HBM Industry Chain (Long-term Core Theme)

The high-end HBM products from SK Hynix, Samsung, and Micron have extremely high barriers to entry and are tied to long-term orders from NVIDIA, AMD, and leading cloud providers. The 2027 shortage logic is difficult to disprove. The sector's recent sharp decline is driven by sentiment-driven correction and has room for medium-to-long-term valuation recovery. Upstream packaging, high-purity target materials, and memory testing equipment suppliers will benefit simultaneously.

2. General DRAM/NAND (Limited Upside, Focus on Trading Ranges)

Demand for memory in consumer, mobile, and traditional server markets is stable. Industry capacity expansion brings supply increases, limiting price upside. The pace of corporate profit recovery is slowing. This segment is only suitable for short-term trading on price rallies, not for long-term heavy allocation.

3. Domestic Memory Independence Track (Independent Cycle)

Domestic memory manufacturers are not constrained by the overseas giants' capacity expansion logic. Domestic substitution is the long-term core logic. Government, computing power, and domestic servers continue to adopt domestic memory chips, creating a cycle misalignment with overseas memory. After corrections, this segment has independent allocation value and can move independently.

IV. Two Scenarios for Future Market Outlook

Scenario One: Short-term Sentiment Correction, Super-cycle Not Yet Peaked

This sharp decline is a valuation correction driven by sentiment following the listing catalyst and short-term supply concerns. It does not change the core fundamental of structural HBM shortage in 2027.
Future Trend: The sector gradually stabilizes and bottoms out within 1-3 weeks, with HBM core leaders leading the recovery rebound; general memory stocks consolidate at lows.
Allocation Strategy: Accumulate HBM leaders and upstream memory equipment/material stocks on dips; avoid general consumer memory stocks.

Scenario Two: Cycle Peaks Temporarily, Entering 3-6 Months of Consolidation

If subsequent spot memory prices continue to weaken, and major manufacturers lower their 2027 capital expenditure guidance, leading to persistent market oversupply expectations, the memory sector will enter a medium-to-long-term adjustment phase.
Future Trend: The sector continues to trend downward in a volatile manner, with only the domestic memory independence track maintaining resilience.
Allocation Strategy: Reduce exposure to overseas memory leaders and switch to domestic substitution and computing equipment defensive sectors.

V. Summary

Short-term

The sector is in an oversold sentiment phase. Avoid blindly buying the dip. Wait for two key stabilization signals: spot memory prices stop falling and start rising, and leaders like Hynix stop declining and close positive. Prioritize allocation to high-barrier HBM sub-sectors; avoid general memory foundries and low-end flash memory companies.

Medium-to-long-term

The memory industry is experiencing structural differentiation. Abandon the mindset of "the whole sector rising together":

1. Hold the three main themes for the long term: HBM, memory equipment, and domestic memory;
2. Reduce holdings in general consumer-grade memory stocks on rallies, as oversupply will constrain long-term profit potential.$SK Hynix(SKHY.US)