S & P 500 is back into negative territory for 2009, worst day in 2 months

TSX plunges 4.4% on World Bank warning.

North American markets fell Monday as commodities prices collapsed on warnings from the World Bank that the global economy would decline more than it had forecast in March.

"We see a very difficult 2009, with negative growth in the OECD area. Unemployment problems are going to continue to linger," Angel Gurria, the head of the OECD, told Reuters in on the sidelines of a conference in Paris.