Fortum Keeps Atomic Secrets That Nordic Power Rivals Make Public

Fortum Oyj, Finland’s biggest utility, is choosing to delay nuclear-output data that its peers release instantly, forcing traders to pay third-party suppliers for the information that can determine power prices.

Fortum, which doesn’t release any such figures at all, will start to publish the data with a five-day delay by the end of this year, Mari Kalmari, a spokeswoman based in Espoo, Finland, said July 3 by phone. The deferral makes the information “quite useless,” according to Jari Hallivuori, the power-purchasing manager at Turku-based Oy Turku Energia, one of Fortum’s competitors.