How the Fama-French Model Can Help Secure Your Retirement

Managing your retirement nest egg can feel like a balancing act. You need your portfolio to grow enough to outpace inflation, but you also want to avoid the stress of severe market drops.

For years, the traditional rule of thumb was simple: if you wanted higher returns, you just had to take on more general stock market risk. But in the early 1990s, two legendary economists, Eugene Fama and Kenneth French, revolutionized how we look at portfolios. Their framework, known as the Fama-French Three-Factor Model, offers valuable insights that can help today's retirees build smarter, more resilient investment portfolios.

To understand their model, let us first look at the old way of thinking. Traditionally, investment professional advice centered on a single factor: market risk, or the broader stock market's upward or downward movement. If the stock market went up, your portfolio went up; if it crashed, your portfolio crashed.

Fama and French discovered that this single factor only explained about seventy percent of a diversified portfolio's performance. To uncover the remaining thirty percent, they identified two other crucial market forces: company size and company value.

The first addition was the Size Factor. Historically, smaller companies tend to outperform larger corporations over the long term. Though small companies have more room to grow, they tend to come with bumpier rides. For retirees, this factor requires careful handling. While you might want some small-cap exposure to help preserve your purchasing power against rising inflation, you may not be able to afford the extreme volatility. A modest allocation is usually plenty to gain the benefits without risking your baseline financial security.

Their second addition was the Value Factor. Fama and French observed that "value stocks"—companies that are inexpensive relative to their actual financial metrics—tend to beat high-flying, expensive "growth stocks" over time. Growth stocks are the trendy market darlings that dominate the daily news headlines, while value stocks are often boring, mature companies like utilities, consumer staples, or traditional financial institutions.

The appeal of value investing isn't simply that these companies may pay dividends. Rather, investors have historically been rewarded for owning companies that trade at lower valuations relative to their fundamentals. While there can be long stretches where growth stocks outperform, value has historically been one of the most reliable drivers of higher long-term expected returns.

The Three-Factor Model was first published in 1993. Eugene Fama was later awarded the 2013 Nobel Prize in Economic Sciences for his pioneering contributions to our understanding of asset prices and market efficiency.

Two decades later, in 2015, the pair added two additional factors to expand the original framework into the Fama-French Five-Factor Model.

The fourth factor is Profitability. This factor captures the tendency of companies with high, robust operating profitability to outperform companies with weaker profitability.

The fifth and final factor is Investment. This factor accounts for a company's investment practices, capturing the historical trend where companies that invest conservatively (low asset growth) outperform those that invest aggressively (high asset growth).

A Smarter Way to Capture These Factors

One interesting aspect of modern portfolio management is that many investment firms have gone a step beyond the academic model. While momentum—the tendency for stocks with strong recent performance to continue outperforming over intermediate periods—isn't one of the five Fama-French factors, firms such as Dimensional Fund Advisors (DFA) and Avantis have found practical ways to incorporate momentum into their investment process.

Rather than chasing the market's hottest stocks, these firms use momentum as a portfolio implementation tool. When buying and selling securities, they generally seek to avoid trading against strong market momentum whenever practical. This disciplined approach can help reduce trading costs, improve tax efficiency, and preserve long-term exposure to factors such as value, profitability, and smaller company size.

In other words, momentum isn't about predicting the next market winner—it's about implementing a factor-based investment strategy more efficiently.

To recap, the Fama-French Five-Factor Model is a framework for structuring your investment portfolio that considers:

• Market Risk: The broad performance of the stock market relative to safer investments like government bonds. If the overall market rises, a diversified portfolio generally rises with it.
• Size (Small Minus Big): The historical tendency of smaller, nimbler companies to outperform larger, established corporations over long investment horizons.
• Value (High Minus Low): The trend where undervalued, mature companies outperform expensive, high-flying growth stocks over time.
• Profitability (Robust Minus Weak): The tendency of companies with strong, robust operating profits to outperform companies with weak or erratic profit margins.
• Investment (Conservative Minus Aggressive): The pattern where companies that reinvest their capital conservatively (steady, measured growth) outperform companies that expand aggressively (rapid, high asset growth).

Applying the Fama-French model to your retirement strategy does not mean you should start picking individual stocks or taking unnecessary gambles. Instead, it means looking under the hood of your investment portfolio.

Our team at Massie Financial Planning works to ensure your equity allocation is not overly concentrated in expensive growth stocks. By intentionally tilting portions of a diversified portfolio toward companies with stronger expected return characteristics—such as value stocks, smaller companies, and highly profitable businesses—we seek to increase expected returns while maintaining broad diversification.

Rather than attempting to predict which sector or stock will outperform next, we rely on decades of academic research and disciplined implementation to position portfolios for long-term success.

This approach provides a smoother financial path, helping you maintain long-term purchasing power while securing the financial flexibility needed to fully enjoy your retirement.

Ready to look under the hood together? Schedule a call today.

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