Why a Model Portfolio Approach Can Work Against You

Last Updated on April 27, 2026

What is a Model Portfolio Approach?

A model portfolio is a predefined basket of stocks with fixed weightages, managed based on a fund manager’s conviction and risk-reward framework. Every new investor entering the portfolio is aligned to this same structure, irrespective of when they invest.

At first glance, this seems efficient. It ensures consistency and simplifies execution. But this standardisation comes with an inherent flaw that most investors overlook.

The Structural Problem with Model Portfolios

When fresh money is deployed into a model portfolio, it is allocated in the same proportions as existing holdings. This means more capital automatically flows into stocks that have already performed well and now occupy a larger share of the portfolio.

At the same time, stocks that may have become more attractive due to price corrections receive a smaller allocation because their weight in the portfolio has reduced.

This leads to a counterintuitive outcome. Investors end up buying more of what has already gone up and less of what may now offer better value. Over time, this works against the fundamental principle of investing, which is to buy low and sell high.

Why Timing of Entry Matters More Than It Appears

Investing is not just about what you buy, but also when you buy it. The opportunity set available to an investor changes with market conditions.

An investor entering when markets are undervalued can afford to take a more aggressive stance, allocating more towards equities where downside risk is relatively lower. On the other hand, when markets are expensive, a more cautious approach becomes necessary to protect capital.

A model portfolio ignores this distinction. It treats all investors the same, regardless of market valuations at the time of entry. This reduces the ability to adapt portfolios based on risk levels prevailing in the market.

Why the Same Portfolio Cannot Work for Everyone

Stocks move through cycles. A stock that was attractive a year ago may no longer offer the same margin of safety today. Yet, in a model portfolio, new investors are often required to buy into these very stocks simply because they are part of the existing structure.

This creates a mismatch. Existing investors may continue to hold these stocks because they entered at favourable prices. But new investors are effectively buying them at higher valuations, reducing their future return potential.

A more thoughtful approach recognises that each investor’s portfolio should reflect current opportunities, not past decisions.

A More Context-Driven Way to Build Portfolios

Portfolios built at different points in time naturally look different. This is not a flaw, but a reflection of changing market conditions.

For instance, during periods when specific sectors are out of favour due to temporary challenges, they may offer better entry opportunities. At other times, the same sectors may become expensive and unattractive. A rigid portfolio structure fails to capture these shifts.

By adapting allocations based on valuation and opportunity, investors can align their portfolios with prevailing conditions rather than historical allocations.

The Real Objective: Maximising Return Potential Given the Starting Point

The returns an investor earns are significantly influenced by the valuations at which they begin investing. Starting in a period of low valuations naturally improves the probability of higher returns, while entering at elevated valuations requires a more cautious approach.

A flexible portfolio construction process acknowledges this reality. It focuses on maximising return potential based on current market conditions rather than forcing every investor into a uniform structure.

Closing Perspective

A model portfolio offers simplicity, but often at the cost of relevance. It assumes that the same set of decisions will work equally well for all investors, regardless of timing or valuation.

In practice, investing does not work that way. Portfolios need to evolve with market conditions and reflect the opportunities available at the time of investment.

The goal is not uniformity. It is alignment, between price, quality, and timing.

At MoneyWorks4me, we do not follow a one-size-fits-all model portfolio. Instead, we help you build a portfolio based on current market opportunities, focusing on quality stocks available at reasonable prices. Our approach ensures that your investments are aligned with when you start, not constrained by past allocations. Explore how you can build a more relevant and disciplined portfolio.

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