SK Hynix Plunges 15% as AI Chip Rally Loses Momentum
SK Hynix had a brutal session on July 13, with the stock falling 15.37% to 1.845 million won, while South Korea’s KOSPI index was hit hard and later closed down 8.95% at 6,806.93 points, according to market reporting cited by various outlets. The selloff also pushed the stock roughly 38% below its June 25 peak, confirming that the AI-chip is now deep into a sharp correction.
What Happened
The move was not just a normal bad day. Various reports posted this drop to be its biggest single-day drop on record in Seoul, after a powerful rally earlier in the year left investors looking for reasons to lock in gains. The broader Korean market also came under heavy stress, with local reports saying a circuit breaker or market-wide trading halt was triggered as the KOSPI fell sharply.
The immediate trigger appears to have been a mix of profit-taking and renewed caution around the memory-chip cycle, which had been one of the hottest trades in Asia. Investors who had made big gains started heading for the next exit at the same time, and that made the fall feel much steeper.
Checking the Numbers
The claim that SK Hynix erased nearly $200 billion in market value is broadly in line with the move from a peak valuation of about $1.25 trillion to roughly $1.05 trillion, which is a decline of about $200 billion. Moreover, SK Hynix has already crossed the $1 trillion valuation market during the AI-driven boom, so the company was coming off a very high base before this selloff began.
The July slide also fits the wider trend seen in recent days, when chip stocks across Korea and elsewhere started wobbling as investors reassessed how long the AI memory boom can keep running at full speed. Earlier in July, SK Hynix dropped 14.57% in one session, showing that the pressure had been building before Monday’s shock.
Why Investors Panicked
SK Hynix has been one of the clearest winners of the AI trade because its memory chips are tied to demand from AI servers and data centres. This made the stock a favorite, but it also made it vulnerable when sentiment turned. Once a stock rises fast enough, even a small change in mood can turn into a big drop, especially when traders rush to protect profits.
There is also a broader fear that expectations got too aggressive. The market has priced in a supply, and strong earnings growth. When investors started asking whether growth could stay that strong, the mood shifted from celebration to caution very quickly.
Market Mood
The KOSPI’s steep fall added fuel to the fire. Market reports on July 13 said the index was dragged into a market-wide panic, with some outlets describing a trading halt and others referring to a circuit breaker response as losses deepened. This kind of move usually tells traders that the fear is no longer limited to one stock but it is spreading across the whole market.
For SK Hynix, the message is clear: the AI story is still alive, but the market is no longer willing to pay any price for it. After such a fast climb, the stock is now being treated less like a one-way winner and more like a name that swings violently in both directions.
What Comes Next
For now, this looks like a classic reality check after an extraordinary run. The company is still well-known within the industry but with the latest drop it is clear that sentiments can quickly flip when a crowded trade starts unwinding.
Moreover, SK Hynix did not suddenly become a weak company overnight. What changed was the market’s appetite for paying huge prices for future growth, and that appetite has clearly cooled.
