South Korea’s KOSPI surges nearly 45% in two months — retail investors averaging two accounts per person are a big reason

A lightning rally driven by chips, reform and retail

South Korea’s benchmark KOSPI index closed at 6,244.13 on February 27, placing it in record-high territory and up 44.89% year‑to‑date — roughly a two‑month run from the calendar year start. The benchmark’s total market capitalization hit about $3.76 trillion on February 25, vaulting South Korea past France to become the world’s ninth‑largest equity market. What’s behind the move? Strong corporate profits, aggressive governance reforms and a tidal wave of new investor money — including a very active retail base.

Semiconductors and a few giants carry the market

Two companies dominate the story: Samsung Electronics and SK Hynix together account for roughly 40% of South Korea’s market cap. Analysts are forecasting unusually large profits for memory makers as demand for high‑bandwidth memories (HBM) for AI GPUs and rising memory prices lift margins. Broker estimates put Samsung’s first‑quarter operating profit near 32.5 trillion KRW (about 156 billion RMB) and SK Hynix around 28.3 trillion KRW. It has been reported that Samsung’s memory division even quoted a steep price rise in talks with Apple — reportedly testing large increases — and Apple reportedly accepted a take‑it‑or‑leave‑it price to lock capacity. Whether anecdote or fact, the broader trend is clear: memory prices have climbed sharply and are supporting outsized earnings.

Policy push and retail behaviour: governance rules meet household savers

Seoul’s policy push has been explicit. Since 2024 regulators and exchanges have pressed listed firms to improve shareholder returns and governance (the “Korea Value‑up” initiative), and the government has tightened rules to combat artificially depressed stock prices. New measures include stricter valuation for inheritance/gift tax where price suppression is suspected, mandatory cancellation of repurchased treasury shares within a year, and a public “poor governance” list for laggards. At the same time, 2025 reforms liberalized foreign investment rules and cut transaction taxes to attract overseas capital.

But domestic retail participation is the other standout. It has been reported that Korea had about 124.5 million “active trading accounts” at the end of January — a stock of accounts that works out to roughly two accounts per person given a population near 52 million. Multiple drivers explain this: minors can open accounts and generous 10‑year gift allowances (e.g., 20 million KRW tax‑free for minors, 50 million KRW for adults) encourage family gifting and multi‑account strategies; IPO allocation and “new‑share” lotteries are distributed by account, so opening multiple accounts can boost chances. The result is unusually high retail activity that amplifies price moves.

What Western investors should watch

The rapid rally raises classic questions: sustainability, concentration risk, and geopolitics. Korea’s market is heavily concentrated in memory and large caps, which leaves it sensitive to cyclical swings and policy shifts. Geopolitical tensions and export controls on advanced chip tech remain a background risk that could reshape supply chains and demand patterns — a reminder that much of the rally is tied to an industry at the centre of U.S.‑China strategic competition. For now, Korea’s blend of corporate profit momentum, governance reforms and a mobilized retail base has created a striking market rebound — but investors should be mindful that the forces that drove the rally can also reverse it quickly.