Is the Canadian operating model becoming the American one? CalPERS, the total portfolio approach, and the governance it demands

UAO Research · May 20, 2026 · Pensions & Retirement · Feeds: Pension Strategy Watch

On July 1, the largest public pension in the United States will stop running money the way American pensions have run it for half a century. CalPERS will retire strategic asset allocation — the discipline of setting fixed targets for each asset class and rebalancing back to them — and adopt a total portfolio approach built around a single 75/25 reference portfolio and a 400-basis-point active-risk budget. CalSTRS is converging on the same idea through its "one-fund" model. The question for every other large owner is not whether to applaud the move, but whether the operating system pioneered in Toronto and Melbourne actually transplants into US public-pension governance — and whether the value it promises survives the move.

What the evidence says

The intellectual case for the total portfolio approach (TPA) is that asset-class buckets are an accident of how the industry is organized, not how risk actually behaves. Under strategic asset allocation (SAA), a fund sets a policy mix, hands each sleeve to a team measured against its own benchmark, and rebalances to targets. Under TPA, there are no asset-class targets: every potential investment competes for capital on what it contributes to one total-fund objective, measured against one reference portfolio, inside a single risk budget. CalPERS's own framing is that replacing 11 benchmarks with one improves transparency and lets staff allocate to the best opportunity rather than to a target CalPERS Board Adopts Streamlined Investment Approach, CalPERS, 2025..

The most-cited evidence comes from the Thinking Ahead Institute, the research arm associated with WTW, whose peer study of 26 large asset owners found that funds running a TPA added roughly 1.8 percent a year over a decade relative to those using SAA, and named CPP Investments and Australia's Future Fund as reference implementations Total Portfolio Approach research hub and Global Asset Owner Peer Study, Thinking Ahead Institute (WTW).. That is a large number — large enough that, taken at face value, it would dwarf almost any manager-selection edge. CalPERS, tellingly, does not take it at face value: its internal target is 50–60 basis points a year, an order of magnitude below the peer-study figure How CalPERS aims to add 50–60 bps using TPA, Top1000funds, Dec 2025.. The gap between those two numbers is the most honest thing in the whole debate.

CalSTRS frames its version as "evolution, not revolution," three years into reshaping how it diversifies, with CIO Scott Chan describing a unification of public and private markets under one framework to manage liquidity and risk dynamically P&I Face to Face: Scott Chan on CalSTRS' one-fund approach, Pensions & Investments, 2026.; Dynamic diversification: CalSTRS' One Fund approach, Top1000funds, Mar 2026..

Where it is contested

Three things are unresolved, and a serious allocator should hold all of them.

First, the 1.8 percent is an association, not a causal result. The peer study compares self-selected large funds; the institutions that adopted TPA early — CPP, Future Fund, GIC-style sovereigns — are also among the best-resourced and best-governed in the world. Some of that 1.8 percent is the operating model; some is simply who chose it. The number is the industry's best available evidence, not proof, and CalPERS's far lower internal target is the tell that practitioners know it.

Second, TPA concentrates judgement. SAA's rigidity is also a control: a policy mix set by a board constrains staff and forces rebalancing into weakness. TPA hands the internal investment team far more discretion to move capital across the whole fund, governed by a risk budget rather than by asset-class targets. That is precisely the design CPP and Future Fund were built for — large internal teams, strong boards, a culture of total-fund accountability. It is not obviously the design a US public plan, with political appointees on the board, elected officials in the room, and a thinner internal bench, was built for. The model's value and its governance risk are the same feature.

Third, the timing cuts both ways. TPA's promise — dynamic, cross-asset reallocation under one liquidity framework — is most valuable in exactly the kind of stress now visible in private credit, where redemption gates are closing and the ability to move liquidity across the whole fund matters. But discretion is also most dangerous in stress. The first real test of US TPA will not be in a calm market.

From the allocator's seat

If you run a large plan and are watching CalPERS, the useful response is not to copy the reference portfolio; it is to interrogate three things before you adopt the model. One: governance depth. TPA without a strong board and a deep internal team is just unconstrained active management with a nicer name — the control that SAA provided has to be replaced by risk-budget discipline and a board capable of holding staff to it. Two: the benchmark. A single 75/25 reference portfolio is honest and legible, but it also means every private-markets and alternatives decision is now measured against listed beta plus a risk budget — which sharpens, rather than softens, the question of whether your illiquid book actually earns its premium. Three: liquidity plumbing. The whole point of "one fund" is unified liquidity management; if your systems still see public and private books as separate, you have the TPA label without the capability. The commercial implication for managers and OCIOs is the mirror image: in a TPA world, you are no longer selling into an asset-class bucket with its own target to fill — you are competing for capital against everything else in the fund, on total-fund contribution. The pitch changes.

What to watch next

July 1, 2026: CalPERS's TPA goes live; watch the first reporting cycle for how performance is presented against the single reference portfolio.
CalSTRS board materials through 2026: the pace of the "one-fund" consolidation into two larger buckets, and any disclosed change to the opportunities-portfolio band.
Other large US plans: whether any of the big state systems signal a TPA or reference-portfolio study in their next investment-committee cycle — the second US adopter is the real test of whether this is a trend.
The next stress event: the first quarter in which a TPA-run US plan has to move liquidity across the whole fund under pressure. That, not a calm-market backtest, is the evidence that will matter.

Sources

UAO Research. AI-assisted monitoring and drafting; reviewed and edited by the UAO editorial desk before publication. Not investment advice.

What the evidence says

Where it is contested

From the allocator's seat

What to watch next

The morning briefing for the people who allocate long-horizon capital.