Range width tradeoff at +30% price move (IL stress-test, RES-LPIS-VALIDATION-01, Table 2.2)
Tight Range [−30%, +40%]
−16.6%
IL at +30% move (still in range)
Highest fee concentration
+40% exit triggers full USDC conversion
Medium Range [−40%, +60%]
−12.3%
IL at +30% move (still in range)
4.3pp less IL vs tight
Moderate fee concentration
Wide Range [−60%, +100%]
−9.3%
IL at +30% move (well in range)
Lowest fee concentration
Stays in range through ±60%
Key insight: Range width does not change the fees/IL ratio in isolation — it changes which price scenarios you're protected against. Tight ranges earn more when price stays in range; they're punished more when price exits. The Fibonacci tool targets the range that maximizes time-in-range based on historical price density.