Ørsted shares fall 25% after it reveals troubles in US business

Almost 7bn wiped off value of world's largest offshore wind company over possible 1.8bn write-down

Shares in the world's largest offshore wind company have tumbled by nearly a quarter after it said it may have to write down the value of its US portfolio by nearly 2bn.

Orsted said it had been hit by a flurry of setbacks in its American business, triggering a rapid sell-off in its shares, listed in Copenhagen.