Aviva to return $5.5 billion to investors, Cevian demands more

LONDON (Reuters) -British insurer Aviva pledged on Thursday to return at least 4 billion pounds ($5.5 billion) to shareholders, sending its shares surging, but activist investor Cevian Capital demanded more.FILE PHOTO: An Aviva logo sits on the window of the company head office in the city of London, Britain March