In the 1960s US draft dodgers headed north to Canada to avoid the war in Vietnam. Today, some 40 years later, Wall Street may be preparing a similar move to avoid dealing with US president Barack Obama's stricter new banking regulations. Many of Wall Streets top names already have offices in Toronto, including Goldman Sachs, J P Morgan and Citi. US bankers are particularly concerned about protecting their proprietary (or prop) trading and hedge fund operations. It's the kind of stuff that makes Wall Street exciting -- and highly lucrative.