In Seoul, trading screens show a number that would have seemed crazy eighteen months ago. Asia’s fourth-largest economy is tracked by the Kospi, which is South Korea’s main stock index. At the last check on July 6, it was around 8,051 points. To give you an idea, the 52-week low was just above 3,000. That move doesn’t happen in the dark, and it hasn’t.
When you walk into any brokerage office in Yeouido, Seoul’s financial district, you’ll feel a strange mix of happiness and worry. When the index reached new highs earlier this year, currency dealers were seen having a good time. The celebrations keep getting cut short, though. Just last month, investors were scared about Federal Reserve policy, which caused the Kospi to drop more than eight percent in one session. Circuit breakers, which stop trading automatically to avoid panic, have been set off thirty-one times just in 2026. No, that’s not right. It points to a market that is driven as much by emotion as by facts.
Samsung Electronics and SK Hynix are the companies that are powering this rally. Anyone who follows Asian markets knows these names. Most of the Kospi’s gains have come from these two chipmakers, which are both deeply connected to the global AI infrastructure boom. Samsung’s stock rose as much as 4% in early trading on Monday, just before its earnings report on Tuesday, which will be closely watched. The price of SK Hynix went up by almost 2%. Because of how concentrated these two stocks are, the whole index moves along with them, which worries some strategists. You can’t help but notice that the Kospi’s fate has become, in many ways, a bet on whether spending on AI actually makes memory chip makers money.
On the other hand, Goldman Sachs isn’t coming back. The bank released a note over the weekend reiterating a 12-point goal for the Kospi over the next twelve months, which is more than 20% above where it is now. They say that the growth in earnings isn’t just happening in chips but also in energy, materials, and industrials. They say that foreign investors are already moving money into those areas. The Goldman note gives the impression that the rally’s second act might be very different from the first. It might have less to do with Samsung and more to do with the Korean corporate economy as a whole catching up.
However, the doubters make a good case. Around twice as much was sold in South Korea in the first half of the year. Gains that big tend to bring in the kind of speculative money that disappears quickly when people’s views change. Goldman disagrees, pointing out that the way small investors are positioning themselves doesn’t look like what you’d normally see in a market that’s too hot. They say that most of the money that Korean families have is still in real estate, cash, and American stocks. As long as domestic stocks are underweighted, the rally should have more room to move.
The story in the won is a little different. It fell even more from Friday’s close, reaching about 1,534 rubles against the dollar on Monday. A weaker currency can be good for exporters like Samsung, but it also shows that foreign investors aren’t sure about the country. Monday’s session showed how quickly things can change: the Kospi opened sharply higher and briefly traded above 8,300, but by midday it had turned around and dropped more than 2%. Traders in most markets would be scared off by that kind of swing during the day. Things are getting boring in Seoul.
It’s likely that two things will determine what comes next. First, Samsung’s early earnings report for the second quarter on Tuesday. If the numbers show that spending on AI infrastructure is making real, growing profits, Monday’s drop will likely look like a chance to buy. If they let down their guard, it will be impossible to ignore how fragile a chip-dependent rally is. Second, there is the bigger question of whether the Kospi can find different winners. Goldman predicts that earnings will rise by 32% this year and by another 35% in 2027. Those are very high numbers, and they’re based on the idea that everything will go well.
It’s still not clear if the Kospi’s 2026 story ends in a triumph or a lesson. The real rally has been caused by changes in the demand for technology around the world and Korea’s huge role in making semiconductors. But when markets go up this quickly because of two stocks and one theme, people tend to expect companies that carry those stocks to be perfect. So far, Samsung and SK Hynix have done their part. We’ll know by the next earnings report if that’s enough to keep things going or if traders in Seoul will need to find something else to be happy about.
