Learn / Risk management
Answer page / risk management
Topic cluster / Market neutral and hedgingA market-neutral trade can still lose because neutrality to broad beta does not guarantee stability in the relationship between the legs. If the spread logic depends on a co-movement that stops holding, the trade can bleed even while overall market direction was mostly removed.
What to remember
A hedge can reduce market direction and still leave you exposed to the relationship inside the pair. If the spread mean, relative demand, or cross-asset linkage changes, the trade can lose for reasons that have little to do with broad beta.
Correlation breakdowns often come from regime shifts, one-sided liquidity stress, catalyst asymmetry, or event resolution that changes how one leg should be valued relative to the other.
Look for rolling-correlation instability, spread-distribution changes, and periods where benchmark beta stayed controlled but the pair still drifted in one direction. Those are clues that the problem is relationship decay rather than hedge absence.
The main defenses are modest sizing, walk-forward testing, explicit stop conditions, and paper trading that keeps relationship stability under live observation. A market-neutral label should never replace ongoing doubt about whether the pair still behaves like the same object.