TOKYO—Treasury Secretary Janet Yellen has embarked on an international lobbying blitz for a proposal she says will stave off a global recession, working to address technical and diplomatic challenges to her plan to cap the price of Russian oil.
The goal of the proposed price cap, which Ms. Yellen has been championing for months, is twofold: bring energy prices down by keeping Russian oil flowing to the global market and limit the revenue Russia derives from the sales.
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