Korea Exchange Triggers Sidecar, Halts KOSDAQ Program Buying

The sidecar is a blunt instrument aimed at machine-driven momentum, and its deployment on KOSDAQ signals that the exchange saw programmatic flows amplifying a move rather than reflecting fundamentals. For market participants, the practical effect is a temporary liquidity gap on the buy side, which can widen spreads and distort price discovery in smaller listings. The unanswered question is duration: without a stated timeline, traders must price in uncertainty about when automated buying resumes, and whether the mechanism is triggered again if volatility persists.