Overdevest noted that testing for Barra factors has been mainly limited to large markets like the US – markets that are both bigger and more diversified Canada, which is small and highly concentrated. Those unique characteristics make it more difficult to capture winners through factor-based approaches such as momentum, volatility or value.
Research also shows that Canadian portfolios based on specific Barra factors miss out on many of the top performing stocks in Canada and end up capturing a lot of losers that negatively impact performance.
So what should plan sponsors do? The answer is good old-fashioned stock picking, said Overdevest. It might not be as exciting as factor models, but it can help capture more winners and avoid the losers in the Canadian market.