When rumors of the Swiss central bank again intervening to drive down the value of the Swiss franc hit the world’s currency trading desks late last week, it underscored just how hard global governments are fighting against the strong currencies that can derail exports while also blunting consumer demand at home.

From its high of $147 a barrel last July, West Texas Intermediate Crude oil prices have crashed a cumulative 74%. That ranks as one of the worst absolute declines for any asset since the onset of deflation last July as investors dump most commodities, except gold, silver and several other soft commodities.