What Is Correlation Breakdown?
A correlation breakdown occurs when assets that normally move together suddenly diverge. If BTC and ETH normally have a 0.85 correlation and suddenly move in opposite directions, that's a breakdown. These events can be triggered by: asset-specific news (ETH-only catalyst), liquidity crises (different assets face different selling pressure), or structural changes (one asset's fundamental narrative shifts).
How Correlation Breakdown Works
Correlation breakdowns are dangerous for hedged positions: if you're long BTC and short ETH as a "hedged" trade based on high correlation, a breakdown means both legs can move against you simultaneously. The hedge fails precisely when you need it most — during unusual market conditions.
Why It Matters for Traders
Correlation breakdowns also create opportunities: when a historically correlated pair diverges without a fundamental reason, the convergence trade (buying the underperformer, selling the outperformer) has high probability of success. The key is distinguishing between temporary breakdowns (noise, exploitable) and permanent regime changes (fundamental shift, not mean-reverting).
