The former CEO of the Caisse de dépôt et placement du Québec said Monday he takes responsibility for some of the fund's $39.8-billion loss last year.

Henri-Paul Rousseau headed the fund from 2002 until he left in May 2008, a period during which the Caisse made a big, ill-fated investment in asset-backed commercial paper.

"I'll tell you straight off — the ABCP situation developed when I was the top guy at the Caisse and, as such, I assume total responsibility," Rousseau said in a speech to the Montreal Board of Trade.

The ABCP market froze up in 2007 amid the U.S. subprime mortgage money meltdown. ABCP losses accounted for $4 billion of the total losses last year for the Caisse.

Rousseau said the Caisse was hit by a "perfect storm" in the financial world through a combination of factors, including a sharp drop in the Canadian dollar.

Rousseau said he still believes the Caisse is well-positioned for the future, despite its big loss last year.

Rousseau is now the vice-chairman of Power Corp.