solution2_quote:"Ortiz_will_ultimately_lose_all_of_her_original_$100_investment_per_contract_unless_she_has_nimbly_traded_against_the_position_with_active_delta_hedging_of_the_underlying_stock_index_futures"
请问这句话的后半部分是什么意思。为什么active_delta_hedging会降低损失?delta_hedging不是用来isolate_volatility_risk的么?