A fundamental rule of global economics has flipped: the US dollar now gets stronger when oil prices go up, rather than weaker.
March 31, 2026
Original Paper
When OPEC Speaks: The Dollar's Evolving Reaction to Oil Supply News in the Age of Shale 
SSRN · 6469138
The Takeaway
For decades, rising oil prices were bad news for the US dollar. But since the US became a major oil exporter during the shale revolution, high oil prices now improve the country's trade balance, completely reversing how the world's most important currency reacts to energy shocks.
From the abstract
Over the past two decades, the dollar-oil correlation moved from negative to positive as the U.S. became a net petroleum exporter. We study whether the dollar's response to OPEC announcements changed with this transition. In a daily event study, the reaction to lower-than-expected oil supply news turns from depreciation to appreciation. Structural time-varying-parameter VARs indicate that the reversal is gradual and parallels a terms-of-trade response that stops deteriorating. Interacted panel l