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momentum-system/research
momentum devandClaude Fable 5 e9a1f577a9 feat: research.slippage — paper-vs-real fill variance from recorded NBBO
Prices each closed round-trip against the nearest quote_snapshots NBBO:
per-trade spread cost, book-walk flag (order size > displayed ask), and a
cost-adjusted P&L total. Measured this week: 0.3-0.5% median spreads on
gate-passing names, ~12% profit drag — far below the static 2-4% microcap
proxy. Coverage gaps (quote recorder only follows tracked names) reported
per-trade, not silently dropped.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-22 10:04:47 -05:00
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