Volume accumulation (above-200DMA + 20d-vs-90d volume spike)

Thesis (marginal): Stocks in an established uptrend (above 200-day MA) with a sudden 20-day volume spike (z-score >= 1.0 vs the 90-day baseline) and confirming positive recent returns should continue for 20-40 days as institutional accumulation builds.

Code: research/accumulation_validate.py Report: research/accumulation_report.json (n=2,074)

Why we're parking it: Real signal but the magnitude is too small to support an options structure after frictions.

Hit-rate 57 % is real (significantly above coinflip on n=2,074) but the ~0.5-1 % edge per trade is too small for the options-spread framework that worked for bounce / coil / PEAD. After 30 % friction haircut, edge would round to zero in practice.

Verdict: Not added to the watch-list. Could be combined with other filters to amplify (e.g. accumulation + PEAD = stricter buy signal) but on its own the alpha is too thin.