The fund wants boards to stop treating one benchmark as the final verdict
CPP Investments argues that beating a benchmark no longer measures whether a portfolio is working.
Its modelling shows a diversified pension fund can trail its market benchmark almost 30 percent of the time over a decade, even when its underlying strategy genuinely adds value.
That figure comes from a July 2026 paper from the CPP Investments Insights Institute, the second in a series on the total portfolio approach (TPA).
In a stylized illustration, the authors modelled two portfolios carrying the same total risk: a strategic asset allocation (SAA) portfolio highly correlated with its benchmark, and a TPA portfolio built to diversify away from it.
Even with a higher expected value-add of 100 basis points, the diversified portfolio showed a 29.8 percent chance of underperforming its benchmark over 10 years, the report said, compared with 6.5 percent for the more benchmark-hugging design.
These are false negatives, cases where a sound portfolio looks like it failed.
The paper frames the problem as one of accountability outgrowing its measuring stick.
Under traditional SAA, the report explained, a board sets a policy portfolio and management is judged on whether it beats that benchmark.
Under TPA, management instead owns a broader set of interconnected choices, including how much risk to take, how to diversify, how to balance liquidity, and how to implement, and all of those decisions fall within the scope of performance assessment.
CPP Investments set out three reasons a single benchmark falls short.
First, the authors noted, short-term outperformance or underperformance often reflects luck rather than skill, a problem amplified when a portfolio is intentionally built to differ from its index.
Second, benchmarks drift: as market concentration rises, capitalization-weighted indices can take on exposures managers never intended to hold.
The report pointed to research by Sorensen, Alonso and Belanger describing this as a benchmark's "chameleon" nature, which it said can reward concentration when concentration is winning and penalize diversification held for long-term resilience.
Third, as portfolios add private assets, illiquidity premia and long-duration cash flows, comparisons to public-market indices become, in the report's words, "apples-to-oranges."
Diversification's recent optics feature prominently.
Over the past few years, the upper deciles of feasible portfolio returns have been dominated by heavy exposure to US tech mega-cap listed equities, according to the paper, leaving diversified designs in the lower portions of the distribution.
That does not mean diversification failed, the authors argued, but rather that portfolios built for many environments will lag concentrated, equity-heavy portfolios in a market that rewards listed equities far beyond expectations.
For plan sponsors weighing whether a differentiated strategy is paying off, the report offered CPP's own sustainability record as evidence on its risk-setting decision.
Investment performance is estimated to have cut the base CPP minimum contribution rate from 9.54 percent in the 31st actuarial report to roughly 9.19 percent, a fourth consecutive triennial decline.
Measured from 2012, the rate has fallen from 9.84 percent despite adverse demographic surprises that would normally push it higher.
The Spring Economic Update 2026 proposed reducing the legislated base statutory contribution rate from 9.9 percent to 9.5 percent starting in 2027, the report noted, citing the improved funding position.
CPP Investments targets a level of market risk equal to a portfolio of 85 percent global equities and 15 percent Canadian government bonds for the base plan, and 55 percent equities to 45 percent bonds for the additional plan.
Rather than replace benchmarks, the report positioned them as a diagnostic input within a six-part framework spanning total return outcomes, risk and capital allocation, portfolio construction and diversification, investment selection, decision quality and process, and resilience across market regimes.
Benchmark outperformance does not always deliver institutional aims, the authors wrote, since a strategy can beat its index simply by adding concentration or exposures already held elsewhere.
The challenge reaches beyond pension investing, CPP Investments said, as more organizations manage portfolios against multiple long-horizon goals such as inflation protection and sustainability.
For boards, the paper's takeaways were to align evaluation with delegated decision rights, connect outcomes to objectives, and treat benchmarks as one part of an overall assessment.
The question, the authors concluded, is no longer whether a portfolio beat its benchmark but whether every management decision improved the delivery of long-term goals.
The paper was written by Sally Shen, manager at the Insights Institute; Derek Walker, managing director of total fund transformation initiatives; and Geoffrey Rubin, senior managing director and one fund strategist.
