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Looking Under the Hood: Canadian Equity Concentration and Diversification | EP218
June 18, 2026

Canada’s stock market has set repeated record highs in 2026, even as the domestic economy feels soft. Canadian equity portfolio manager Mark Rutherford explains the gap between the two, and why a large weight in financials can represent more diversification rather than less. He walks through how the team rotated within the sector as the banks re-rated, and the discipline behind trimming a gold position that had run. As indexes themselves have grown more concentrated, the conversation lands on a simple idea: knowing what you own matters more than ever.

Key takeaways

  • The Canadian market and the Canadian economy can tell very different stories. Commodities and financials drive a large share of corporate earnings even though relatively few people work in those sectors, which helps explain record markets alongside near-zero real growth.
  • A large weight in financials is not a single bet. Beneath the label sit banks, life, property and casualty insurers, alternative asset managers, and exchanges, each with its own return drivers and correlations.
  • Position weights reflect what has worked, but they are not fixed. As the banks re-rated from roughly 10 to 12 times earnings toward 15 to 16 times, the team recycled capital into property and casualty insurers and alternative asset managers offering more attractive returns.
  • Gold earns its place through company economics, not a price forecast. Royalty businesses and selected miners were added for their free cash flow and differentiated correlation, then trimmed as the combined weight grew and the rate and inflation backdrop shifted.
  • Trimming winners is as much a part of the discipline as finding them. Allowing any single position or exposure to grow unchecked introduces risk that has nothing to do with the original thesis.
  • Indexes have become increasingly concentrated vehicles. Knowing what you own, and holding exposures by deliberate choice rather than by default, can be key to real diversification.
A transcript of this episode is available below, modified for a more enjoyable reading experience. For more posts exploring the ideas we talk about in the episode, check out our Related Reads links.


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This blog post is solely intended for informational purposes and should not be construed as individualized investment advice, research, or a recommendation to buy, sell or hold specific securities. Information provided reflects current views based on data available at the time or writing and may change without notice. Mawer Investment Management Ltd. and/or its clients may hold positions in the securities mentioned, which may create a potential conflict of interest. While efforts are made to ensure accuracy, Mawer Investment Management Ltd. does not guarantee the completeness or accuracy of this information and disclaims liability for any reliance placed on the publication. Mawer Investment Management Ltd. is not liable for any damages arising out of, or in any way connected with, its use or misuse.
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This blog post is solely intended for informational purposes and should not be construed as individualized investment advice, research, or a recommendation to buy, sell or hold specific securities. Information provided reflects current views based on data available at the time or writing and may change without notice. Mawer Investment Management Ltd. and/or its clients may hold positions in the securities mentioned, which may create a potential conflict of interest. While efforts are made to ensure accuracy, Mawer Investment Management Ltd. does not guarantee the completeness or accuracy of this information and disclaims liability for any reliance placed on the publication. Mawer Investment Management Ltd. is not liable for any damages arising out of, or in any way connected with, its use or misuse.