Like accounts in a batch previously carved legs with independent Math.random, so near-identical day targets could split very differently. Leg fractions are now drawn from groupLegFraction(prefix, tradeDate, legIndex) — FNV-1a seeded like dailyBump — so accounts of the same account type on the same leg of the same day split identically when their remaining targets match, and proportionally close otherwise. Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>