The market had braced for the worst, then discovered it had overestimated the danger.
For the first time in its history, South Korea's stock market has seen more than 400 listed companies surpass a market valuation of 1 trillion won — a milestone that speaks not merely to numbers, but to the quiet accumulation of national economic weight. The crossing arrived swiftly, propelled by a market that absorbed geopolitical shock and then found renewed purpose in the promise of artificial intelligence. It is a moment that invites reflection on how capital concentrates, how fear recedes, and how optimism, once rekindled, can rewrite the record books.
- A single day of panic in late February — when U.S. and Israeli strikes on Iran sent the KOSPI plunging 12 percent — threatened to unravel months of market progress.
- The feared spiral into prolonged conflict never came, and capital that had fled returned faster than most observers anticipated.
- Artificial intelligence has become the engine beneath the recovery, drawing investors back into equities as earnings season approaches and AI-linked companies attract renewed conviction.
- By Wednesday, the KOSPI closed at an all-time high of 6,690.9 points, and the count of trillion-won firms jumped from 377 to 405 in just over two months.
- The question now pressing on markets is whether corporate earnings reports will validate the optimism already baked into these historic valuations.
South Korea's stock market reached a historic threshold this week when the Korea Exchange confirmed that 405 listed companies now carry market valuations exceeding 1 trillion won — roughly $680 million each. It is the first time that number has surpassed 400, and it arrived with a speed that surprised even seasoned observers.
Of those 405 firms, 267 trade on the KOSPI and 137 on KOSDAQ, the technology-heavy exchange where faster-growing companies tend to cluster. Seventy-nine of them have crossed into the even more rarefied tier of companies worth more than 10 trillion won.
The journey to this milestone was not smooth. In late February, as the United States and Israel launched military strikes on Iran, the KOSPI shed 12 percent in a single session. The count of trillion-won firms stood at 377 that day, and the market braced for worse. But the conflict did not escalate into the prolonged crisis investors feared, and the recovery was swift.
The deeper force driving the rally has been artificial intelligence. With earnings season approaching, investors have poured back into companies positioned to benefit from the AI boom, lifting the broader market along with them. The KOSPI closed Wednesday at 6,690.9 points — an all-time record, representing not merely a rebound but a genuine advance into new territory.
Whether the milestone endures depends on what comes next: whether AI momentum translates into real earnings, whether geopolitical calm holds, and whether the optimism now priced into Korean equities finds the corporate results to justify it.
South Korea's stock market crossed a symbolic threshold this week: for the first time in the country's history, more than 400 listed companies have climbed above a market valuation of 1 trillion won—roughly $680 million. The milestone arrived on Wednesday, when the Korea Exchange tallied 405 firms meeting that threshold, a jump of 28 companies in just over two months.
The composition of these 405 firms tells a story of where Korean capital is concentrated. Two hundred sixty-seven trade on the KOSPI, the nation's main benchmark index. Another 137 list on KOSDAQ, the technology-heavy exchange where smaller, faster-growing companies tend to cluster. A single firm trades on KONEX, the exchange reserved for mid-sized enterprises and startups. Among all of them, 79 have vaulted into the rarefied air of companies worth more than 10 trillion won.
What makes this number remarkable is the speed of the climb. On February 27, just before the United States and Israel launched military strikes on Iran, the count stood at 377 companies. The market had braced for the worst. In a single trading session, the KOSPI plummeted 12 percent as investors fled to safety. But the feared escalation did not materialize into the kind of prolonged conflict that might have crippled global markets. The recovery came swiftly.
The real fuel for the rally, though, has been artificial intelligence. As corporate earnings season approaches, investors have rediscovered their appetite for companies positioned to benefit from the AI boom. The momentum has been broad enough to lift the entire market. By Wednesday, the KOSPI closed at 6,690.9 points—the highest level ever recorded in the index's history. That record close represents not just a recovery from the February dip, but a genuine advance into new territory.
The crossing of the 400-company threshold is less a story about any single firm and more a reflection of how much capital has accumulated in Korean equities, and how widely distributed that wealth has become. It suggests that the country's listed companies, taken as a whole, have grown wealthier and more numerous in the ranks of substantial enterprises. Whether that growth proves sustainable depends largely on what happens next: whether the AI rally continues to drive earnings, whether geopolitical tensions remain contained, and whether the corporate earnings reports due in the coming weeks justify the optimism that has already priced itself into these valuations.
Citas Notables
Korea's stock market has been on a bullish run recently on a revived artificial intelligence rally ahead of the corporate earnings season.— Korea Exchange data and market analysis
La Conversación del Hearth Otra perspectiva de la historia
What does it mean that 405 companies now exceed 1 trillion won in market cap? Is that just a number, or does it signal something about Korea's economy?
It's both. The number itself is a milestone—it's never happened before. But what it really shows is that Korean companies, collectively, have accumulated significant wealth and that wealth is spread across many sectors, not just a handful of giants.
The jump from 377 to 405 in two months is striking. What changed so dramatically?
Two things collided. First, the market had panicked in late February over the Middle East conflict and dropped 12 percent in a day. Then, when that conflict didn't spiral into something worse, investors came back. But they came back especially hungry for AI-related stocks as earnings season approached.
So the geopolitical event was almost a false alarm?
In a sense. The market priced in catastrophe, then repriced when catastrophe didn't arrive. But the real driver of the rally wasn't just relief—it was the AI momentum. That's what's keeping money flowing in.
Does a record-high KOSPI close mean the market is overheated, or is it justified?
That's the question investors are wrestling with right now. The valuations are built on expectations about AI earnings. If companies deliver on those expectations in the coming weeks, the rally holds. If they disappoint, you could see a correction.
What does this milestone mean for ordinary Korean investors?
It means more of the companies they might own have crossed into a tier of stability and size. But it also means the market has run hard and fast. The risk is that some of that optimism is already baked in.