From Universe to Portfolio: How Construction Actually Works
Your halal portfolio outperformed conventional funds in 2008 and 2020. But do you know why? The answer changes how you build.
Portfolio Construction, Principled Portfolio Framework, PPF Construction
Last week, we built the Foundation layer of the Principled Portfolio Framework. Before allocating a single dollar, you mapped your universe — which screening standard you’re following, what sectors it produces, which geographies it concentrates in, and whether every instrument you’re considering is genuinely compliant or just assumed to be.
Now comes the question every investor eventually asks: so what do I actually do with all that?
This is the Construction layer. And it starts with a fact that surprises most people.
Shariah-compliant portfolios outperformed conventional ones during both the 2008 financial crisis and the 2020 COVID crash. Most investors know this. Very few know why. And the ‘why’ is everything. |
Because if you don’t understand why it happened, you can’t know whether it will happen again. And you definitely can’t build a portfolio that deliberately captures the advantage rather than accidentally stumbling into it.
The Simple Explanation — and Why It’s Wrong
The most common story goes like this: Islamic portfolios outperform during crises because they’re morally clean. Screened portfolios avoid sin industries, and sin industries perform poorly when the world falls apart.
This is a satisfying story. It is also not what actually happened.
The real explanation has nothing to do with ethics. It has everything to do with three specific investment characteristics that the screening process happens to create — whether you intended them or not.
These three characteristics are what investment professionals call ‘factors.’ A factor is simply a measurable feature of a stock or portfolio that explains a portion of its performance. Think of it like asking: what is it about this portfolio, specifically, that makes it go up or down?
Here are the three factors that explain what happened.
Factor 1: Low Leverage
You already know this one from Issue 3. The Shariah debt screen excludes any company where debt exceeds roughly 33% of its value. The result is a portfolio that is structurally low-debt.
Why does this matter in a crisis? Because when things go wrong, debt kills companies. A business with no debt can survive a 40% drop in revenue. A business with high debt and fixed interest payments cannot. It runs out of cash and collapses.
In 2008, the companies and banks that failed were almost universally the most heavily indebted ones. Shariah-compliant portfolios didn’t hold these companies — not because they were avoided on principle, but because the debt screen had already removed them.
This is what a factor driver looks like. The outperformance in 2008 didn’t come from ethics. It came from a mechanical rule that removed fragile, over-leveraged companies from the investable universe. The screen did the work. You just had to own it.
Factor 2: Quality Tilt
When the debt screen removes high-debt companies, what’s left? Companies that tend to be financially stronger than average. Strong balance sheets. More stable earnings. Better cash generation.
In investment terms, this is called a quality tilt — your portfolio leans toward higher-quality businesses without you explicitly choosing to do so.
Quality tends to outperform during downturns for a simple reason: quality businesses have options. When conditions get difficult, they can cut costs, draw on their cash reserves, continue investing while competitors retreat. Low-quality, high-debt businesses have no such flexibility. They’re just trying to survive.
In both 2008 and 2020, quality as a factor delivered strong relative performance. Shariah-compliant portfolios were full of quality companies — again, not by design, but as a consequence of the screens.
Factor 3: Sector Exclusions
The third factor is the most visible one: what’s not in your portfolio.
Banks and financial companies are almost entirely excluded from Shariah-compliant portfolios. In a normal environment, this is a cost — you miss out when banks do well. In 2008, it was a massive advantage. Banks were the centre of the crisis. Their stocks didn’t just fall — many went to zero. Not holding them meant not suffering those losses.
In 2020, the story was different but the principle was the same. Airlines, hotels, and leisure companies — industries wrecked by lockdowns — make up very little of a typical halal portfolio. Technology companies, which thrived as the world moved online, were already overweight. The sector exclusions that look like constraints in good times became advantages in bad times.
Here is the critical point: these three factors — low leverage, quality tilt, and sector exclusions — were not chosen by anyone. They were produced automatically by the screening rules. Most investors who benefited from the 2008 and 2020 outperformance didn’t know they had these factors working for them. |
Why ‘Screening Alone’ Is Not Enough
Now here is where the Construction layer of the PPF comes in.
If these three factors happen automatically from screening, why does construction matter at all?
Because automatic is not the same as deliberate. And deliberate is better.
When these factors are produced accidentally, three problems follow.
Problem 1: You don’t know what you have.
If you don’t know you have a quality tilt, you can’t maintain it intentionally. You can’t check whether it’s drifting. You can’t explain why your portfolio is behaving the way it is. You’re just watching numbers go up and down without understanding the engine.
Problem 2: You can’t control the concentration.
Screening produces a tech-heavy portfolio. If you don’t understand why, you can’t decide whether that’s a risk you want. Maybe you work in tech yourself — your salary, your career prospects, and your portfolio are all now moving together. That’s not diversification. That’s a concentration risk hiding inside a compliance label.
Problem 3: The advantage is not permanent.
The three factors outperformed during 2008 and 2020 because of specific market conditions. Low leverage helps when credit is tightening. Quality helps when earnings are under pressure. Sector exclusions help when excluded sectors are the ones in crisis.
These conditions don’t last forever. In environments where financial companies are thriving and rates are falling, the same screens that protected you become a drag. Understanding the factors means understanding when the advantage applies — and when it doesn’t.
What the Construction Layer Does
The Construction layer of the PPF takes your mapped universe — built in the Foundation layer — and turns it into a deliberate structure.
Deliberate means three things.
First, you make the factor exposures explicit.
You identify the quality tilt and decide whether to lean into it or moderate it. You measure the leverage profile of your equity holdings. You look at your sector weights and decide whether they reflect your view of the world or whether they need adjusting.
This doesn’t require a Bloomberg terminal. It requires knowing what you own and asking the right questions about it.
Second, you make allocation decisions at the portfolio level, not the instrument level.
Most investors think about each instrument separately: ‘Is this ETF good? Is this sukuk good?’ Construction thinking asks a different question: ‘How does this fit into the whole?’
A Malaysian sukuk fund might be excellent on its own. But if your portfolio is already heavily concentrated in ASEAN equities, adding it increases concentration rather than reducing it. The instrument isn’t the unit of analysis. The portfolio is.
Third, you build for the future as well as the present.
A constructed portfolio has a rebalancing rule. It has a view on when to add to sukuk and when to reduce them. It has thought about what happens if tech corrects by 30%, or if oil falls sharply, or if a specific sukuk issuer comes under stress.
Screening alone doesn’t do any of this. It tells you what’s permissible. Construction tells you how much, in what combination, adjusted for what conditions.
A Concrete Example: The Same Three ETFs, Two Different Portfolios
Here’s how this works in practice.
Two investors. Both hold SPUS (US halal equities), a GCC sukuk fund, and a commodity murabaha fund. Identical instruments.
Investor A put 70% in SPUS, 20% in GCC sukuk, and 10% in commodity murabaha. They chose these weights because they seemed reasonable. They haven’t thought about what factors the portfolio has. They don’t know how the GCC sukuk correlates with SPUS during a tech downturn. They haven’t checked whether 10% in commodity murabaha is the right amount of liquidity or just a cash pile earning almost nothing.
Investor B went through the Construction layer. They know SPUS carries a 55% tech weight, so they chose 60% rather than 70% to moderate the concentration. They know GCC sukuk correlates with oil prices, and since their equity holdings already have indirect energy exposure, they kept it at 15% rather than 20%. They added a small allocation to a Malaysian equity fund — bringing in different economic drivers as covered in Issue 5. Their commodity murabaha sits at 5% — enough for liquidity, not so much that it drags on returns.
Both portfolios use the same three instruments. One was accumulated. The other was built. They will behave differently when conditions change. Only one of them will respond in the way its owner expects.
The Screening Fallacy
There is a tempting idea at the heart of halal investing: if I own the right things — the compliant things — I am protected.
This is what we call the Screening Fallacy. Compliance is necessary. It is not sufficient.
A Shariah-compliant tech stock can still represent an overdose of concentration risk. A fully certified sukuk fund can still be poorly timed, poorly sized, and highly correlated with your other holdings. The screen clears the first hurdle. The construction clears the rest.
Outperformance isn’t virtuous. It’s structural. The factors that drove Islamic portfolio performance in 2008 and 2020 were real, measurable, and mechanical. Intentional construction means capturing those factors deliberately — and knowing when the conditions that make them powerful have changed. |
What Comes Next: Stewardship
The Construction layer converts your mapped universe into a deliberate portfolio. But construction is a snapshot, not a system. Markets move. Companies drift in and out of compliance. Your own circumstances change.
The third layer of the PPF — Stewardship — is about maintaining what you built: monitoring, rebalancing, and managing the portfolio over time. Next week, we bring all three layers together in one place — the full PPF picture from Foundation through Construction to Stewardship, applied to a complete portfolio from start to finish.
The architecture is different. Construction makes it deliberate.
MizanMacro is a Shariah-aligned capital research platform. MizanMacro Intelligence publishes every Tuesday.
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