Winnipeg Free Press By: Ross Marowits, The Canadian Press Posted: TORONTO - On Jan. 1, investors celebrating Bay Street's best returns since the global financial crisis couldn't have known what kind of year they were about to face. A sign for Scotiabank's iTRADE at the Scotiabank Plaza Concourse is shown in Toronto on Wednesday Nov. 8, 2017.THE CANADIAN PRESS/Doug Ives TORONTO - On Jan. 1, investors celebrating Bay Street's best returns since the global financial crisis couldn't have known what kind of year they were about to face. The year on stock exchanges was marked by swift and frequent changes in reaction to news events, with updates on the number of active COVID-19 cases or the latest round of vaccine trials moving the needle as much as traditional economic indicators like the unemployment rate or central bank policy changes.