Mean-reversion algorithm trading 25 FX pairs with options-based tail risk hedging. When the algorithm doubles position size, a straddle (put + call) is purchased: the protective side caps loss at 3% of notional, the recovery side profits from mean reversion. On 76% of doubles the recovery option earns back more than its cost, reducing net hedge expense to 10% of P&L. 20 consecutive profitable months with zero negative months.