Swensen (Yale Endowment)
David Swensen's approach at Yale revolutionized institutional investing by allocating heavily to alternatives (real estate, private equity) and away from traditional stocks and bonds.
Forward-looking estimates over a long horizon, not a measurement of any past period. Built from J.P. Morgan’s 2026 Long-Term Capital Market Assumptions, annualized and compounded, with a 3.10% risk-free rate. The figures are in US dollars. J.P. Morgan publishes the same assumptions in 5 base currencies and the numbers differ between them, since the expected move in the currency is part of the forecast. This page is built once, on the dollar edition; the full app runs on whichever one you choose.
Allocation
What if you add Bitcoin?
These are forward-looking estimates rather than a backtest. Nothing below is what Bitcoin did; it is what the portfolio would return if every asset delivered its expected return from here. Each row funds Bitcoin by reducing the other positions proportionally.
The assumption doing the work is Bitcoin at 15.00% a year with 42.5% volatility. That is far below its history and deliberately so: a forward estimate for an asset this young is a judgment, not an extrapolation. It also explains why the returns below move less than people expect. A 10% position in a 15% asset can only add about a point a year to a portfolio, because it is 10% of the portfolio. What changes more than the return is the Sharpe ratio, which is the column worth reading.
| Portfolio | Return | Volatility | Sharpe |
|---|---|---|---|
| Base (Swensen (Yale Endowment)) | 7.21% | 12.78% | 0.38 |
| With 5% Bitcoin | 7.90% | 13.04% | 0.43 |
| With 10% Bitcoin | 8.52% | 13.52% | 0.46 |
Returns are geometric (compound), forward-looking and in US dollars, built from J.P. Morgan’s 2026 Long-Term Capital Market Assumptions with Bitcoin at 15.00% (our own estimate). Sharpe ratio uses a 3.10% risk-free rate. No time period is involved: these are expectations for a long horizon rather than a measurement of any past window. For what this portfolio actually did, month by month, see the historical record back to 1970.
The endowment model
David Swensen transformed institutional investing at Yale by doing something heretical for the 1980s: moving sharply away from US stocks and bonds and into alternatives: real estate, private equity, natural resources, and international equities. The thesis was that long-term investors are paid a premium for accepting illiquidity and for diversifying beyond the crowded, efficiently-priced US large-cap market.
It worked spectacularly for Yale over multiple decades. The version here approximates the model with assets retail investors can actually hold: 35% global and emerging equities, 20% REITs, 15% listed private equity, and 30% in Treasuries and inflation-linked bonds.
What to expect, and the big caveat
On forward-looking assumptions, the diversified, alternatives-heavy mix produces a competitive expected return with diversification a plain 60/40 lacks (see the numbers above). The REIT and private-equity sleeves add return sources that don't move in lockstep with public equities.
The caveat is large and worth stating plainly: the real Yale portfolio earns much of its edge from genuinely illiquid investments that ordinary investors cannot access, chiefly top-tier venture capital and buyout funds. A retail approximation using listed REITs and public PE proxies captures the shape of the strategy, not the illiquidity premium that made Yale's version exceptional. Expect a diluted version of the result.
The hidden costs of going alternative
Alternatives come with frictions that index portfolios don't. Listed private equity and REITs can carry higher fees and more leverage, and despite trading daily they show surprising correlation to equities in a crisis, when everything liquid tends to fall together. The diversification is real in normal times and weaker in exactly the panics where you most want it.
This is the gap between the institutional model and its retail imitation. Yale can hold illiquid assets through a crash because it never has to sell; an individual holding liquid proxies feels the daily volatility and the temptation to act. Knowing that difference is the difference between using this model well and being disappointed by it.
Who the endowment model is for
It suits an investor who genuinely believes in diversification beyond stocks and bonds, has a long horizon, and is comfortable holding assets that can behave unpredictably year to year, REITs especially. It's a thoughtful core for someone who wants more than the standard 60/40 without going all-in on equities.
It's a poor fit for anyone seeking simplicity or low costs, or who would be unsettled by the tracking error against a plain index portfolio. And no retail version should be sold as the Yale portfolio, since it approximates the principles rather than the holdings. The table above shows how a small Bitcoin allocation, as another uncorrelated return source, fits the same diversification logic Swensen pioneered.
How these numbers are calculated
Expected returns and volatilities come from J.P. Morgan's 2026 Long-Term Capital Market Assumptions (30th edition), in US dollars. Portfolio risk is computed using the full 57×57 correlation matrix, measured from the assets' own monthly returns, not simple weighted averages. The Sharpe ratio uses 3.10% (US Cash) as the risk-free rate.
For full methodology details, see the methodology page.
Customize this portfolio
Adjust weights, add constraints, try different optimization methods.
Frequently asked questions
What is the Yale Endowment portfolio?
The Yale Endowment model, developed by David Swensen, allocates heavily to alternative investments (real estate, private equity, natural resources) and away from traditional 60/40 allocations. The approach generated exceptional returns for Yale's endowment over decades by capturing illiquidity premiums.
Can individual investors replicate the Yale portfolio?
Partially. The exact Yale portfolio includes illiquid investments (venture capital, leveraged buyouts) that retail investors cannot easily access. However, the principles can be approximated using REITs, listed infrastructure, and commodities ETFs, which is what Portfolio Lab's version uses.