U.S. Treasury presses on with rule opposing serial tax inversions

Reuters: Despite Republican plans to scale back federal regulation next year, the U.S. Treasury is moving to finalize a controversial rule intended to make it harder for American companies to avoid U.S. taxes by redomiciling abroad.

The rule, issued as temporary regulations in April, has been challenged in federal court after it helped scuttle a planned $160 billion merger between Ireland-based Allergan Plc (AGN.N) and U.S. drugmaker Pfizer Inc (PFE.N).

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