The Trump administration issued a stop-work order, over national security concerns, on a nearly completed offshore wind project for Massachusetts and Rhode Island.

An order to stop work on the Revolution Wind project off Rhode Island further rattled the beleaguered Danish company.

Orsted A/S shares fell as much as 19% to a record low after the Trump administration blocked construction of an almost-finished offshore wind farm, throwing a wrench into the Danish company’s planned 60 billion-kroner ($9.