Three investing professionals square off in a challenge to raise money for charity. It's the Holland Bloorview Investor challenge to raise funds for the Holland Bloorview Kids Rehabilitation Hospital. We have top investing picks from: Aubrey Hearn, vice-president and senior portfolio manager at Sentry Investments, Sean McNulty, CEO and portfolio manager at XIB Asset Management Inc, and Alex Sasso, CEO and portfolio manager at NCM Investments.