Macro-Robust Portfolio Construction
Build for multiple economic outcomes instead of betting on one forecast
- Difficulty
- Expert
- Time to result
- ~ongoing to results
- Steps
- 6
- Confidence
- 94%
Start from the premise that even respected economists and policymakers rarely forecast complex systems consistently. Instead of choosing one inflation, deflation, rate, or growth narrative, define several plausible environments and examine how the portfolio behaves in each. Avoid positions whose success requires one precise macro path, and favor businesses and securities that retain value across a range of outcomes. Compare the available alternatives rather than evaluating any asset in isolation: expensive equities may still dominate low-yield, covenant-light debt or depreciating cash. Diversification here does not mean owning everything; it means preventing one unprovable forecast from controlling the portfolio. The objective is a collection of assets that can endure surprises while retaining attractive long-term return potential.
Origin
Extracted from Masters in Business, where Steve Romick explained why FPA avoids relying on economists and instead constructs portfolios for uncertain policy and inflation outcomes.
Core principles
- 01Assume macro forecasts are unreliable
- 02Prepare for multiple plausible outcomes
- 03Avoid concentrating around one economic narrative
- 04Prefer durable businesses over precise predictions
- 05Evaluate alternatives before changing exposure
How to run it
- 1
Define plausible regimes
List materially different environments such as inflation, deflation, recession, low-rate stagnation, and stronger growth. Include unexpected policy reactions rather than selecting a single favored forecast.
Pro tip Ask what could happen before asking what is most likely.
Watch out Do not make small variations of the same base case look like genuine diversification.
- 2
Map asset sensitivities
Assess how every material holding would respond to each regime through demand, pricing, financing costs, valuation, and liquidity. Identify hidden concentrations in shared economic drivers.
Pro tip Examine second-order effects such as policy responses to an initial downturn.
Watch out Historical correlations may fail when policy or market structure changes.
- 3
Remove forecast dependency
Reduce positions whose investment case collapses unless one macro prediction is correct. Retain exposures supported primarily by durable business economics and conservative pricing.
Pro tip Rewrite each thesis without mentioning the predicted GDP, inflation, or rate number.
Watch out Macro robustness does not eliminate company-specific risk.
- 4
Compare imperfect alternatives
Evaluate stocks, bonds, credit, and cash under the same scenarios. Select the combination offering the strongest long-term trade-off rather than demanding that any option be ideal.
Pro tip Include currency debasement and weak covenants in the cost of apparently safe assets.
Watch out Cash and investment-grade debt can carry meaningful real-return risk.
- 5
Limit directional concentration
Construct the portfolio so no single macro outcome determines survival. Use position sizing and varied economic exposures to preserve flexibility.
Pro tip Stress-test the portfolio against the outcome the team considers least likely.
Watch out Owning many securities does not create robustness if they share the same underlying exposure.
- 6
Update without forecasting theatrics
Reassess scenarios as facts and prices change, but avoid reacting to every economic prediction. Alter positions when the risk-reward changes materially.
Pro tip Separate a changed price from a changed long-term payoff distribution.
Watch out Frequent macro-driven trading can replace robustness with narrative chasing.
In the wild
Romick could see reasonable prospects for inflation but did not claim to know whether it would occur directly or through an initial deflationary episode followed by stimulus. The fund therefore remained more invested than not while avoiding a portfolio committed entirely to one path.
→ The portfolio retained exposure to long-term asset appreciation without requiring an accurate near-term inflation forecast.
An endowment considers recession, persistent inflation, and low-rate stagnation. It tests each holding across all three, trims leveraged growth assets that fail in two regimes, retains durable pricing-power businesses, and holds selective secured credit plus liquidity reserves.
→ No single economic forecast controls the endowment's ability to fund its obligations.
Common mistakes
Following confident economists
A persuasive forecast is not the same as a consistently reliable forecasting process, especially when many moving parts interact.
Treating cash as riskless
Cash can lose substantial purchasing power when inflation rises or currencies are debased.
Diversifying labels, not exposures
Different asset names may still depend on the same interest-rate, growth, or liquidity environment.
Is it for you?
Best for
It is best for long-horizon allocators navigating uncertain inflation, interest-rate, fiscal, and growth regimes.
Not ideal for
It is not ideal for mandate-driven macro traders whose strategy explicitly depends on concentrated short-term economic calls.
From the transcript
“we just try and create a portfolio that's robust to multiple outcomes”
“there's just way too many moving parts.”
“somebody gets it right, but nobody's right consistently, and sometimes they're they're wildly wrong.”
From the episode
Steven Romick on Portfolio Investments (Podcast)
Steven Romick