KOSPI and KOSDAQ both triggered consecutive buy-side sidecars on Tuesday morning — a rare dual activation — as Korean equities staged a swift recovery from Black Monday, when a historic 8.29% plunge wiped out an estimated 554 trillion won (USD 399 billion) in market capitalization in a single session.
Program buy orders on the KOSPI were suspended at 9:12 a.m. KST after KOSPI 200 futures surged more than 5% above Monday's close and held the gain for a full minute, the threshold required to trigger the mechanism. Just sixteen minutes later, at 9:28 a.m., a second buy-side sidecar activated in the KOSDAQ market, pointing to broad-based recovery momentum rather than strength confined to blue-chip heavyweights.
Chip giants reclaim key price levels. Samsung Electronics (005930.KS) climbed to 304,250 won (+2.96%), clawing back above the psychologically important 300,000-won mark that it had been forced under for the first time this year during Monday's rout. SK hynix (000660.KS) rose to 2,031,000 won (+6.28%), recovering the 2-million-won threshold it lost on the same session. Samsung Electro-Mechanics, a key component supplier, added 8.59%.
The overnight catalyst came from Wall Street. The Philadelphia Semiconductor Index surged 5.8% on Monday evening — its steepest single-day gain in months — while the Nasdaq Composite added 0.86% to close at 25,929.66. The U.S. rebound was itself a reversal from a two-day pullback that had dragged Korean chip stocks into their sharpest correction since the 2022 bear market.
Smart money moved in during the plunge. NH Investment & Securities raised its target price for Samsung Electronics to 530,000 won — from 490,000 — on Monday, even as the stock fell. Separately, data showed that clients ranked in the top 1% of investment returns at one major brokerage were among the heaviest net buyers of Samsung shares during Tuesday's rebound, a pattern analysts associate with accumulation rather than short-term speculation.
KOSDAQ biotechs joined the surge. Alteogen, the peptide half-life extension developer, jumped 15.89%, reversing a two-day sell-off that had been partly driven by global risk aversion rather than company-specific news. Rainbow Robotics gained 3.44%.
Analysts caution on forward volatility. "The shock from the two-day plunge was so severe that a phase of expanded volatility could continue this week," said Han Ji-young, a market strategist at Kiwoom Securities, citing residual uncertainty over U.S. semiconductor export controls — the policy shock that triggered Monday's sell-off — and the upcoming U.S. CPI print, which could influence the Federal Reserve's rate trajectory.
The KOSPI opened at 7,697.76 and reached an intraday peak of 7,847.74, recovering roughly half the ground lost in the previous session's 676-point collapse. The KOSDAQ opened at 937.69 and hit 957.96 before paring gains.
Sources:
KOSPI, KOSDAQ Trigger Buy-Side Sidecars as Markets Rebound Sharply — Seoul Economic Daily
Samsung Up 6%, SK hynix Up 8% as Korea's Top Two Rally in Pre-Market — Seoul Economic Daily
Top 1% Investors Pile Into Samsung Electronics — Seoul Economic Daily
