The Loop-Gain Matrix: Coupled Rebalancing Feedback and the Blind Spots of Scalar Stability Monitoring
How leveraged funds hide systemic risk by watching the wrong numbers
When multiple leveraged exchange-traded funds trade related assets, they create hidden feedback loops that single-product monitoring completely misses. Researchers found that watching each fund individually reports 'safe' while the full system is actually unstable, and in Korea's 2026 crisis, invisible spillover from one fund's rebalancing accounted for 41% of price swings in another asset.
Regulators and exchanges currently monitor leveraged funds one at a time, meaning they cannot see the cascade risks that emerge when funds rebalance together. The Korean case shows these blind spots are real and costly: investors in Samsung Electronics experienced large, unmeasured price moves caused by rebalancing in a separate stock complex. Fixing this requires monitoring the entire web of connected funds, not each in isolation.