Korea Exchange Triggers Sidecar, Halts KOSDAQ Programmatic Buying

The sidecar is a mechanical, not fundamental, intervention: it pauses the programmatic bid rather than repricing risk, so the signal is about market plumbing under stress, not about KOSDAQ fundamentals. The immediate effect falls on algorithmic and systematic participants, who lose a key source of liquidity and may see wider spreads or sharper moves in their absence. The open question is whether the halt is a brief technical timeout or a precursor to broader risk-off behavior; the undisclosed trigger threshold and resumption timing leave that unresolved.