Mean-reversion algorithm trading 25 FX pairs with options-based tail risk hedging. When the algorithm doubles position size, a 30-day strangle (put + call, 1% OTM) is modeled: the protective side caps loss at ~3% of doubled notional plus the premium, enforced by a mandatory close at option expiry. Spot fills are real (21 consecutive profitable months unhedged); the hedge overlay is simulated and has cost -11.4% of spot P&L under the rule-enforced model, including 3 negative overlay months. See the Hedge Report for the full cost breakdown and per-event disclosures.