Orsted’s Worst Week on Record Hints at More Volatility to Come

Since its market debut more than nine years ago, wind power pioneer Orsted A/S has experienced the highs of ranking among Europe’s most valuable energy companies, and this week’s low of giving up all stock gains since going public.

Orsted’s plans to raise as much as 60 billion Danish kroner ($9.4 billion) in a stock sale is putting the shares on track for their worst week on record, having plunged 34% so far this week.

The company is the biggest declinerthis year in Europe’s Stoxx 600 Utilities Index, which has rallied on lower interest rates and investor preference ...