ソース:[1] Bitcoin (BTC) Traders Buy More Downside Protection After Federal Reserve Rate Cut: Deribit (https://www.coindesk.com/markets/2025/09/19/b ...)[2] BTC Options: Front-End Vol Crushed and Skew Flips to Downside Premium - Deribit Insights (https://vertexaisearch.cloud.google.com/groun ...)[3] Global Markets React to Fed Rate Cut and Outlook (https://vertexaisearch.cloud.google.com/groun ...)