Joel Greenblatt’s formula investing approach, popularized through his book The Little Book That Still Beats the Market , offers a systematic method for identifying undervalued companies with strong earnings. This strategy, often referred to as the Magic Formula, focuses on ranking businesses using specific financial metrics to uncover potential bargains in the public equity markets. The core principle revolves around purchasing wonderful businesses at fair or unfair prices, a concept that has attracted both adherents and skeptics since its inception.
Understanding the Magic Formula Strategy
At its heart, the Magic Formula is a quantitative screen that evaluates stocks based on two primary dimensions: earnings yield and return on invested capital (ROIC). Earnings yield, calculated as earnings before interest and taxes (EBIT) divided by enterprise value, serves as a proxy for valuation, highlighting companies that are relatively cheap. ROIC, on the top of the formula, measures how effectively a business uses its capital to generate profits, separating truly efficient operators from those merely reporting high revenue.
The Mechanics of the Formula
The implementation of Joel Greenblatt formula investing involves a straightforward ranking process. Investors assign a ranking to every company in a broad market index based on their EBIT/Enterprise Value, with the highest yield receiving the top rank. They then perform a similar ranking based on the ROIC metric, again placing the most efficient capital users at the top. By adding these two ranks together and sorting for the lowest combined scores, the investor creates a focused list of the 20 to 30 best candidates according to the formula.
Key Financial Metrics Explained
The success of this methodology hinges on the specific metrics chosen to evaluate a business. Using EBIT rather than net income removes the impact of tax jurisdictions and accounting variations related to interest, allowing for a cleaner comparison of operational profitability. Enterprise value, which includes debt and excludes cash, provides a more accurate picture of the total cost to acquire a company compared to simple market capitalization.
Earnings Yield: EBIT divided by Enterprise Value.
Return on Invested Capital: EBIT divided by Net Net Fixed Assets and Working Capital.
Ranking: Lower combined rank indicates a more attractive investment opportunity.
Practical Application and Portfolio Management
Applying the Joel Greenblatt formula requires discipline, as the strategy mandates purchasing these top-ranked stocks in equal dollar amounts rather than equal shares. This approach ensures that no single position dominates the portfolio, effectively managing risk across a diverse collection of companies. Furthermore, the formula dictates an annual review and rebalancing, where underperforming stocks are sold and the capital is redeployed into current high-ranking names to maintain the strategy’s integrity.
Behavioral and Market Advantages
One of the significant benefits of this system is its inherent resistance to emotional decision-making. By relying on a predefined set of rules, investors avoid the pitfalls of market hysteria and narrative-driven trading. The strategy essentially forces investors to buy when others are fearful, targeting companies that are out of favor but fundamentally sound, thereby capitalizing on market inefficiencies over time.
Historical Performance and Considerations
Historically, backtests and real-world applications of Joel Greenblatt formula investing have demonstrated impressive long-term returns, often significantly outpacing the broader market indices. However, it is crucial to acknowledge that past performance does not guarantee future results. The strategy can experience periods of underperformance, particularly during bull markets where high-growth, low-value stocks dominate, requiring investors to adhere to the plan without deviation.
Tax implications are another important factor for individual investors to consider. The frequent turnover of the portfolio holdings can generate significant short-term capital gains, which may be taxed at a higher rate than long-term gains. Despite these considerations, the transparency and rule-based nature of the Magic Formula continue to make it a compelling option for value-oriented investors seeking a structured approach to the markets.
