The South Korean stock market has emerged as Asia's top performer in the first half of the year, posting a remarkable 92% gain. However, Goldman Sachs cautions that while the path ahead may be bumpy, it also presents broader opportunities.
According to the investment bank's research, the KOSPI index's stellar performance was primarily driven by significant upward revisions in corporate earnings expectations. The vast majority of the returns came from AI-related technology hardware and semiconductor stocks.
Analyst John Kwon noted, "While volatility has risen and may remain elevated, broader thematic opportunities, sustained rapid earnings growth, and attractive valuations should propel the KOSPI toward our 12-month target of 12,000 points."
A unique aspect of this rally is that the index's sharp rise was not accompanied by a corresponding expansion in valuations. Forward earnings per share (EPS) expectations have been revised up by nearly 200%, while the forward price-to-earnings ratio has actually contracted slightly. This indicates the rally is fueled by improving profit expectations rather than investors simply paying higher multiples.
Market Breadth Narrows to Post-Pandemic Low
Despite the index hitting record highs, market internals show significant divergence. The advance/decline ratio for the KOSPI has fallen to its lowest level since the onset of the COVID-19 pandemic. This means a large number of individual stocks are underperforming the benchmark, with gains concentrated in a select few AI bottleneck companies and memory chip leaders.
Technology hardware and semiconductors have been the absolute dominant themes, contributing 87% of the market's total return year-to-date. This is underpinned by accelerating AI investment, improving memory chip prices, and substantial earnings upgrades.
Specifically, the top two memory chip stocks, Samsung Electronics and SK Hynix, contributed nearly 90% to the index's first-half gains. Their combined market weight has risen to 56%, with an even higher earnings contribution of 72%. Analysts point out this concentration reflects real earnings strength rather than a valuation bubble, but it also means many fundamentally improving companies are being overlooked, setting the stage for stock-picking opportunities in the second half.
Memory Remains Key, But a Second Engine is Needed
The fundamentals for the memory sector remain strong in the first half, supported by rapidly growing computing demand, record supply gaps, sustained pricing power, and relatively low valuations. However, if the pace of earnings upgrades slows, previously lagging sectors could catch up.
The AI investment cycle is broadening from memory to areas like power infrastructure, semiconductor equipment, industrial automation, and application layers. For the Korean market, this could benefit sectors such as robotics, defense, shipbuilding, and energy infrastructure.
Earnings revisions are also spreading. Sectors like industrials, materials, and energy are entering an earnings recovery phase, driven by AI infrastructure spending, power demand, and improved capital expenditure. On valuation, excluding Samsung and SK Hynix, the MSCI Korea index's 12-month forward P/E is around 11.2x, below the MSCI Asia ex-Japan average of 11.8x and lower than most regional markets.
Retail Participation: Less Risky Than It Appears
Concerns have arisen that a surge in retail participation and record-high margin balances might be turning the Korean market into a speculative, retail-driven arena. Goldman Sachs argues that while participation has increased, it is not overheating.
Three key reasons support this view. First, the retail ownership share is only slightly above its long-term average, with foreign investors still holding a significant portion of the market. Second, leverage levels are not as high as they seem; much of the growth in leveraged ETF assets comes from appreciation, not new leveraged inflows. Crucially, the growth rate of investor deposit balances outpaces that of margin loans, causing the margin loan-to-deposit ratio to actually decline, indicating retail investors still hold substantial cash buffers.
Third, Korean household assets remain heavily weighted toward real estate. Retail investors still hold approximately $200 billion in US stocks, with about $10 billion flowing in year-to-date. This diversified allocation suggests significant room remains for them to increase domestic equity exposure if market conditions stay attractive.
Outlook for the Second Half: Bumpy Road to 12,000 Points
Goldman Sachs maintains an overweight stance on Korean equities with a 12-month KOSPI target of 12,000 points. From current levels, this implies over 20% upside for the second half.
This forecast is supported by several core data points. Analysts project full-year 2026 earnings growth for Korea at a substantial 32%, with a further 35% growth expected in 2027. Even excluding the two heavyweight memory stocks, earnings growth for the remaining companies is estimated at 74%. The current KOSPI forward P/E of approximately 6.65x is 2.7 standard deviations below its historical average, representing its lowest level since the 2009 financial crisis.
Analysts state, "This combination of strong earnings growth and low valuation makes Korea the market with the lowest price-to-earnings-to-growth (PEG) ratio in Asia."
Risks, however, persist. Goldman notes the third quarter historically exhibits seasonal weakness, and the index's significant deviation from its moving averages creates technical pressure for a pullback. Furthermore, the expanded size of leveraged ETFs could amplify market volatility through market makers' hedging activities.
Corporate Governance Reform: An Underappreciated Catalyst
Analysts believe corporate governance reform is another crucial pillar supporting the Korean market in the second half, one that is currently under-priced by the market. A packed reform agenda is underway, including measures to strengthen independent director requirements, implement cumulative voting, mandate hybrid shareholder meetings, and introduce a "name-and-shame" disclosure system for companies with persistently low price-to-book ratios (PBR).
Additionally, starting in the second half of 2026, inheritance and gift taxes for companies with a PBR below 0.8x will be calculated based on 80% of net asset value rather than the depressed market price. With over 70% of KOSPI-listed companies still trading below book value—a rate far higher than Japan's TOPIX, the S&P 500, or Europe's STOXX 600—Goldman Sachs sees clear re-rating potential for low-PBR companies as anti-"Korea discount" measures are incorporated into the 2026 tax reform bill. Concurrently, ongoing share buybacks, dividend tax incentives, and "value-up" programs provide companies with the motivation and capability to enhance shareholder returns.
Six Key Opportunity Themes for the Second Half
Analysts see opportunities broadening beyond memory chips to encompass wider themes:
1. Industrials: Defense, shipbuilding, and construction. Defense order momentum is expected to build, with expanding opportunities in Western Europe, while valuations already discount these catalysts. In shipbuilding, order wins are anticipated to re-accelerate, driven by replacement demand for at least 86 very large crude carriers (VLCCs) and high freight rates.
2. Robotics and Physical AI: Korea's robust automotive parts ecosystem positions it as a potential core actuator supplier for humanoid robot manufacturers outside China, a trend already visible with Boston Dynamics. Goldman estimates Korean firms could account for roughly 30% of global humanoid robot production directly and indirectly by 2035.
3. Batteries and Power Infrastructure: The rapid expansion of AI computing demand is making data center energy storage a key structural driver for the battery industry. Goldman's energy team recently raised its 2030 US battery storage market forecast. Korean battery makers hold competitive advantages in this segment, with potentially higher margins than electric vehicle battery operations.
4. Corporate Governance and Anti-Discount Beneficiaries: Companies with high ownership concentration and PBRs below 1x are direct beneficiaries of anti-"Korea discount" policies. Holding companies and preferred shares still trade at discounts of around 40% to common shares or net asset value, indicating governance reforms are not fully priced in.
5. Reflation Trade: Strong earnings from semiconductor leaders are spilling over into the broader economy. Goldman's economics team has upgraded Korea's GDP forecast. Sectors like financials, construction, and department stores could benefit from this reflationary environment.
6. Semiconductor Capital Expenditure Supply Chain: The Korean government's "Three Super Projects" plan involves massive investment to expand semiconductor manufacturing bases. As major chipmakers further increase capital expenditure, KOSDAQ-listed semiconductor parts and materials companies, with greater exposure to front-end and packaging processes, stand to benefit from the upstream capex cycle.
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