Treatment (briefings): +7.83% | max drawdown 5.95%
Control (price only): -8.14% | max drawdown 15.95%
Web search arm: -1.55% | max drawdown 12.63%
Placebo (stale data): -7.70% | max drawdown 10.17%
BTC buy-and-hold: -34.70%
Treatment beat control by +15.97pp. Beat web search by +9.38pp. All 7 experiments positive, range +4.46pp to +15.97pp across two models (Opus 4.6, Sonnet 4.5).
Getting the drill wasn't the hard part, knowing where to drill is