KOSPI jumps 5.85%, chip short squeeze rebound

The global chip selloff triggered by the new model from Luna’s Dark Side last week was squeezed back to completion after two trading days
KOSPI rose 5.85% in a single day, briefly touching above 7,100 points intraday. SK hynix rose 8.7%, Samsung 5.6%. The gains were so large they triggered this year’s 20th buyer-side pause program for algorithmic trading. The Philadelphia Semiconductor Index rose 5.21% the day before, and the next day Korean stocks directly “took the baton”
1. Why did it surge this hard?
The answer isn’t entirely that fundamentals improved; more of it is position structure amplifying the move. US stock short positions are at a historic high. Korean stocks have pulled back nearly 25% from their peak. Heavy short positions are forced to cover when prices reverse. This buying isn’t actively chasing bullishness—it’s passive stop-loss liquidation
In the short term, position structure boosts momentum, so when it rises it can look much stronger than the actual signal. A short squeeze rebound and a trend reversal are two completely different things—same appearance, different core
2. Does this rebound have fundamental support?
The Luna’s Dark Side event itself is a valuation shock. It challenges whether the pricing of AI chip demand is too high. This doubt hasn’t disappeared just because the stock price rebounded
Goldman Sachs just issued a report last week recommending reducing AI trading exposure. The market delivered the opposite move within two trading days. This isn’t the market denying Goldman Sachs—it’s that short-term positioning battles temporarily drowned out the fundamental narrative
The real validation window is this week’s capital expenditure guidance from tech giants’ earnings. If Alphabet, Microsoft, and Meta’s AI investment guidance is maintained or even raised, then this rebound will have the confidence to evolve into a trend repair
If capital expenditure guidance starts to show marginal contraction, the shorts’ logic will return—and the next selloff will be more orderly. You won’t get another short-squeeze rebound to catch you
It feels great watching it rise, but I’d rather wait for earnings to speak before making a call
DYOR not investment advice