The Korea Composite Stock Price Index (KOSPI) has been consistently reaching new all-time highs, positioning the South Korean capital market at an unforeseen milestone. Long-standing factors such as a persistent valuation discount and a pattern of range-bound trading, which have historically constrained the index, appear to be decisively breaking down.

In a recent report, Goldman Sachs has emphatically endorsed the South Korean stock market, naming it the bank's "highest conviction" view in Asia. The firm maintained its "overweight" rating and raised its 12-month target for the KOSPI from 8,000 to 9,000 points. This optimistic outlook is supported by the index's remarkable performance this year, which saw it breach the key 7,000-point level for the first time this week. Year-to-date, the bull market has propelled the KOSPI up by approximately 78%, ranking it among the world's strongest-performing markets.

Goldman Sachs identifies demand for memory semiconductors, driven by artificial intelligence (AI), as the core force behind this rally. South Korea's semiconductor sector, led by Samsung Electronics and SK Hynix, is becoming a critical bottleneck in the global AI supply chain. Analysts at the firm stated, "The prospect of sustained high profitability in the memory semiconductor industry suggests the market is mispricing the durability of these earnings." Despite the recent surge, Goldman believes overall valuations for South Korean stocks remain relatively reasonable, highlighting their investment appeal. The bank projects a 300% growth in South Korean corporate earnings by 2026, led by hardware and semiconductor stocks.

The report specifically highlighted that for DRAM and NAND chips, essential for AI servers and data centers, "a record supply gap, coupled with robust demand from hyperscale data center investments, is driving a sharp increase in memory chip prices." With the rise of high-computing AI agents and the implementation of long-term supply agreements, memory chip manufacturers may be entering a "prolonged period of high profitability."

As of Friday's close, the KOSPI stood at 7,498 points. Although the index fell over 2% in early trading, it fully recovered those losses intraday and briefly surpassed the 7,500 mark. For the week, the KOSPI gained 13.6%, its largest weekly increase since October 2008.

**From 'Cyclical' to 'Structural': Bottleneck Strategy Reshapes Value Logic**

This capital boom is fueled by a global "AI arms race" among IT giants fighting for survival. As noted by an industry expert, large tech companies cannot afford to halt investments, even under free cash flow pressure, as falling behind in this competition risks obsolescence. In this environment, South Korean companies are reaping substantial profits due to their dominant positions in critical bottleneck sectors like semiconductors and electric power.

Another analyst pointed to penetration rates, noting that AI currently accounts for only about 1% of the global knowledge labor market, indicating vast potential for future growth. It is predicted that by 2026, semiconductors will contribute 60% of the KOSPI's total operating profit, forming a solid foundation for the market.

Experts assess that the semiconductor industry has broken free from its traditional boom-bust cycle. High demand for server chips and the security of three-to-five-year long-term supply contracts have created a stable profit base, fundamentally altering the industry's dynamics. A key structural shift, often overlooked by the market, was revealed: the top three memory chip companies are now generating higher profits—and better margins—from server DRAM than from the highly sought-after High Bandwidth Memory (HBM). This signals explosive growth in demand for foundational server memory required for data processing as AI models become more complex. The long-term contracts lock in profits, insulating the sector from the extreme volatility of the past.

**Potential Hazards on the Rally: Passive Funds and Valuation Pressure**

However, the bullish stance from Goldman Sachs and other institutions comes amid intense global debate over whether AI-related investments have become too crowded. The KOSPI has more than doubled since the start of 2025, marking a dramatic reversal for a market long hampered by the so-called "Korea discount." Now, years of government-led corporate governance reforms and shareholder-friendly policies are converging with the global AI investment wave.

While billions of dollars from domestic retail and foreign investors are flowing into the market, the simultaneous influx of money into bearish inverse ETFs indicates that confidence among some investors remains fragile. Market experts caution that on this record-breaking journey, investors must be wary of several "invisible hazards."

First, the "quality" of incoming capital is a concern. A significant portion of recent foreign investment is "passive" money that mechanically tracks the index. Such funds could exit en masse in response to negative external shocks, potentially exacerbating market volatility. Second, foreign investors are typically more sensitive to valuations than local investors. A sharp short-term rally increases the risk of profit-taking sell-offs by international players.

One expert noted that while apparent risks, such as Middle East geopolitical conflicts, are largely priced in, the critical variable to watch is the direction of US monetary policy. Should persistent inflation lead to reduced expectations for Federal Reserve interest rate cuts, it could pose a substantial risk to the market.

**The Key: From 'Semiconductors Alone' to 'Broad-Based Growth'**

The market is closely watching to see if the 7,000-point level can transition from a temporary peak to a new long-term support base. Analysts widely agree that for the rally to be sustainable, momentum must spread beyond semiconductors to a broader range of sectors.

There is anticipation that sectors like "Korean heavy industry"—including shipbuilding, defense, nuclear power, and automobiles—could be integrated into the AI value chain and undergo a re-rating, similar to the Japanese market's rise with government support. However, stock performance is likely to become increasingly divergent. Even if the index continues to climb, the risk of individual stock declines remains. Convincing the market that industries outside of semiconductors can also generate substantial long-term profits will be crucial for the KOSPI's next major leap forward.