The KOSPI index broke through the unprecedented 4,000 level on October 27 last year, marking the beginning of the end for the "Korea Discount." This milestone came just four months after the index surpassed 3,000 in June, shortly after the inauguration of the Lee Jae-myung administration. It took less than three months for the KOSPI to reach the historic 5,000 mark, hitting an intraday high of 5,019.54 on the 22nd and setting a new milestone for the Korean stock market.
Market experts point to three key drivers behind the rapid rally, forecasting that the bull market will continue for the time being.
Sector Rotation Prevents Pullbacks
The first driver is sector rotation, with buying interest flowing from semiconductors to other major sectors including automobiles, nuclear power, and defense. Whenever semiconductor stocks entered short-term corrections, investor funds shifted to other large-cap stocks, leaving no room for the index to decline.
From late last year through early this month, Samsung Electronics (005930.KS) and SK hynix (000660.KS) led the index higher on expectations of AI industry expansion and a semiconductor supercycle. When tech stocks weakened globally and faced resistance at highs, buying interest quickly rotated to automobiles, robotics, shipbuilding, defense, and nuclear power.
On January 13, when both Samsung Electronics and SK hynix—which together account for more than one-third of KOSPI's total market capitalization—declined, the index paradoxically rose. Hyundai Motor (005380.KS) saw its valuation multiples expand rapidly after unveiling Atlas, transforming its narrative from a traditional automaker to a robotics and physical AI company. Its share price has surged 80% year-to-date.
Record Liquidity Floods the Market
Historic liquidity levels have also supported the KOSPI rally. Unlike in the past when retail investor funds concentrated on individual small and mid-cap stocks, recent flows have moved into large-cap focused ETFs, lifting the broader index.
Investor deposits reached 96.33 trillion won as of the previous trading day, marking a third consecutive record high, according to the Korea Financial Investment Association. This represents an approximately 82% increase from 52.8 trillion won a year earlier. Margin trading balances also rose to 29.08 trillion won, increasing for five consecutive trading days.
Foreign investor inflows are also notable. The iShares MSCI South Korea ETF (EWY), a representative ETF investing in Korean equities, saw net inflows of $1.12 billion (approximately 1.6 trillion won) over the past month, pushing its assets under management past $10 billion as of the 16th—roughly triple the previous year's level. The Direxion Daily MSCI South Korea Bull 3X Shares (KORU), a triple-leveraged product, has delivered returns exceeding 600% over the past year.
Attractive Valuations Despite Rally
Despite the sharp index gains, valuation concerns for the KOSPI remain limited as earnings expectations for listed companies are rising rapidly. Securities firms estimate this year's net profit for domestic listed companies at 354 trillion won, revised upward by more than 70 trillion won over the past three months.
Although the KOSPI has gained 17.52% in January alone—the fourth-highest monthly increase since 2000—its 12-month forward price-to-earnings ratio stands at 10.48 times, below the five-year average of 10.6 times. The 12-month forward price-to-book ratio exceeds 1.4 times, above the historical average of 1.0, but analysts say this is not excessive given improving return on equity from earnings growth.
"We have finally recovered to emerging market average valuations, resolving the extreme undervaluation," said Kang Dae-kwon, CEO of Life Asset Management.
Outlook
Experts expect the KOSPI to maintain its strength above the 5,000 level. Late January earnings releases from SK hynix and major U.S. Big Tech companies could drive further earnings upgrades. The government's productive finance initiatives and tax law revisions related to investment incentives are expected to maintain the medium-term upward trajectory. Retail investor FOMO (fear of missing out), which has not yet fully materialized, is also cited as a potential catalyst.
However, concerns about short-term exhaustion are also rising. Elevated interest rates and unpredictable moves by U.S. President Donald Trump ahead of midterm elections could increase market volatility.
"After reaching the 5,000 target, battles with profit-taking are inevitable," said Lee Jong-hyung, head of Kiwoom Securities Research Center. "The direction will be maintained, but the pace of gains will likely slow and stock differentiation will intensify."