South Korea’s KOSPI rose 75% in 2025, the best annual return among major stock indices. By mid May 2026, it was up a further 88% year-to-date, with gains linked mainly to artificial intelligence.
Rising equity participation has also been linked to younger people being priced out of housing. “Value-Up” reforms have aimed to reduce the “Korea Discount” and improve shareholder returns.
The AI boom has brought more focus on inequality, housing costs and generational pressure. Debate in Seoul has included whether AI-related gains should support public investment, citizen dividends, pension support, education, startup funding, or wider social spending.
Presidential policy chief Kim Yong-beom wrote that extra tax revenue tied to AI could be redirected to strengthen social programmes. Officials later said his comments were personal views, and the market briefly fell.
Labour tensions have emerged in semiconductors. Samsung Electronics workers have threatened large-scale strikes later this month after pay talks failed, while SK Hynix accepted bonus reforms last year after AI-driven earnings growth.
Some Wall Street firms, including JPMorgan Chase & Co, have pointed to a possible move towards 10,000. Foreign buying has started to ease, market breadth has narrowed, and flows into AI-linked stocks have remained strong.
Given the KOSPI’s historic performance, we must acknowledge the powerful upward momentum that has defined the market since 2025. The index’s 75% gain last year, followed by another 88% so far in 2026, shows that fighting this trend has been a losing strategy. The core driver remains the global AI boom, where Korean semiconductor giants are central players.
However, the market is becoming increasingly sensitive to social and political risks, which presents new opportunities for traders. The recent discussions about taxing AI profits for social spending, though not yet formal policy, caused a notable dip, revealing a new fragility. This means we should anticipate greater volatility around political announcements, especially those concerning wealth redistribution.
The immediate focus should be on the potential for labor unrest at Samsung Electronics later this month. We are seeing a significant rise in the implied volatility of KOSPI 200 options expiring in late May and June, particularly for out-of-the-money puts. This indicates that traders are actively pricing in the risk of a strike, making these protective options more expensive but potentially necessary.
Therefore, a prudent strategy involves using options to maintain upside exposure while hedging against sudden downturns. Buying call options on key AI names or the KOSPI 200 index allows for participation in further gains with a defined risk. Simultaneously, buying put options can serve as insurance against negative shocks from either the strike negotiations or unexpected policy proposals.
We are also observing signs of technical weakness beneath the surface. Data from the Financial Supervisory Service confirms that foreign investors, after being consistent net buyers for over a year, have become net sellers in the first two weeks of May. This, combined with a narrowing market breadth where fewer stocks are driving the index higher, suggests the rally is becoming more concentrated and fragile.
Looking at volatility gauges, the VKOSPI has climbed from near-historic lows of 15 in late 2025 to over 22 recently, signaling growing nervousness. This environment is ideal for strategies that profit from price swings, such as long straddles, ahead of known events like the labor negotiation deadlines. We must be positioned for a market that can rally on AI optimism one day and sell off on a political headline the next.
