Educational content only. The investment strategies described reflect historical approaches and may not be suitable for your situation. Past performance does not guarantee future results. Not investment advice. Consult a qualified financial advisor before making investment decisions.
Joel Greenblatt
Founder, Gotham Capital
Born 1957 · Gotham Asset Management
Joel Greenblatt is best known for developing the "Magic Formula" investing strategy, a systematic approach to value investing that ranks stocks based on two metrics: earnings yield and return on capital. Described in his bestselling book "The Little Book That Beats the Market," the Magic Formula provides a quantitative framework that individual investors can follow without deep financial expertise. Before popularizing this approach, Greenblatt ran Gotham Capital, which generated annualized returns of approximately 50% per year before fees from 1985 to 1995, primarily through special situations investing. He has taught a popular special situations investing course at Columbia Business School for over two decades and serves as chairman of the board of the Success Academy Charter Schools network in New York City.
Biography
Joel Greenblatt was born in 1957 and grew up in the United States. He earned his Bachelor of Science and Master of Business Administration degrees from the Wharton School at the University of Pennsylvania. During his time at Wharton, Greenblatt developed a strong interest in value investing and the analytical frameworks pioneered by Benjamin Graham and David Dodd. His academic training provided a quantitative foundation that shaped his later approach to investing.
In 1985, at the age of 27, Greenblatt founded Gotham Capital with an initial investment of $7 million. Over the following decade, the fund generated annualized returns of approximately 50 percent per year before fees and 40 percent after fees from 1985 to 1995. This performance was achieved through a concentrated portfolio strategy focused on special situations, including corporate spinoffs, restructurings, recapitalizations, and merger-related securities. Greenblatt returned all outside investor capital in 1995, choosing to manage only his own and his partners' money going forward, a decision that reflected his desire for flexibility and his confidence in his long-term approach.
Greenblatt's early career at Gotham Capital focused on special situations investing. He recognized that corporate events such as spinoffs frequently created mispriced securities because large institutional investors often sold the newly created shares without conducting thorough analysis. These situations produced what Greenblatt described as "inefficiencies" in the market -- opportunities where careful research could identify companies trading at significant discounts to their intrinsic value. His approach combined bottom-up fundamental analysis with a keen understanding of the structural dynamics that cause temporary mispricings in equity markets.
In 2005, Greenblatt published "The Little Book That Beats the Market," which introduced the Magic Formula to a broad audience. The formula ranks companies using two metrics: earnings yield (EBIT divided by enterprise value) and return on capital (EBIT divided by net fixed assets plus net working capital). By selecting the highest-ranked companies across both metrics, the formula systematically identifies businesses that are both high quality and attractively priced. Greenblatt backtested the strategy over a 17-year period from 1988 to 2004 and found that a portfolio of approximately 30 Magic Formula stocks, rebalanced annually, produced annualized returns of roughly 30.8 percent compared to 12.4 percent for the S&P 500. The book became a bestseller and brought quantitative value investing to a broad audience of individual investors.
Beyond his investing career, Greenblatt has made significant contributions to education. He has served as an adjunct professor at Columbia Business School for over twenty years, teaching a popular course on special situations investing. He is also involved in philanthropic work focused on education reform, serving as chairman of the board of the Success Academy Charter Schools in New York City. Greenblatt later established Gotham Asset Management, which applies systematic value investing principles on a larger scale, and he has continued to write and speak publicly about making investing more accessible and rational for everyday investors.
Joel Greenblatt's Investment Principles
1.The Magic Formula: High Return on Capital + High Earnings Yield
Buy good companies at bargain prices by ranking stocks on return on capital and earnings yield simultaneously.
The core of Greenblatt's Magic Formula is elegant in its simplicity. Return on capital (EBIT / (net fixed assets + net working capital)) measures how efficiently a company uses its capital to generate profits -- it identifies good businesses. Earnings yield (EBIT / enterprise value) measures how cheap the stock is relative to its earnings -- it identifies bargain prices. By ranking all stocks on both metrics and selecting those that score highest on the combined ranking, the formula systematically finds companies that are both high quality and undervalued. Greenblatt argues that this dual-criteria approach avoids the pitfalls of buying cheap but mediocre companies (value traps) or overpaying for great companies (growth traps). The formula uses EBIT rather than net income to normalize for differences in capital structure and tax rates across companies, making comparisons more meaningful.
Source: "The Little Book That Beats the Market" (2005) by Joel Greenblatt
2.Special Situations Create Structural Mispricings
Corporate events like spinoffs and restructurings create predictable opportunities where securities are mispriced.
Greenblatt built his early career on the insight that corporate events systematically create mispriced securities. When a company spins off a subsidiary, for example, the new entity's shares are often distributed to shareholders of the parent company who have no interest in holding them. Institutional investors with mandate restrictions may be forced to sell, and the small size of many spinoffs means they fall below the radar of large fund managers. This creates a window of opportunity where careful analysis can uncover significant undervaluation. Similar dynamics occur in restructurings, bankruptcies, recapitalizations, and merger securities. Greenblatt emphasizes that these are not random inefficiencies but structural ones -- they arise from predictable institutional behaviors and incentive structures, making them a repeatable source of investment opportunities.
Source: "You Can Be a Stock Market Genius" (1997) by Joel Greenblatt
3.Spinoffs Outperform the Market
Spinoff stocks have historically outperformed the broader market by a wide margin in their early years as independent companies.
One of Greenblatt's most well-known insights is that spinoff stocks tend to significantly outperform the market. He cites research showing that spinoffs have historically beaten the S&P 500 by approximately 10 percentage points per year in their first few years as independent entities. Greenblatt attributes this outperformance to several factors: forced selling by institutional investors who receive shares they never chose to buy, lack of analyst coverage for newly independent companies, and the improved operational focus and management incentives that often accompany corporate separations. He recommends paying particular attention to spinoffs where insiders have significant ownership stakes in the new entity, as this aligns management's interests with shareholders and signals confidence in the business's prospects.
Source: "You Can Be a Stock Market Genius" (1997) by Joel Greenblatt
4.Simplicity Over Complexity
A simple, disciplined system that is easy to follow will outperform a complex one that is abandoned under pressure.
Greenblatt is a strong advocate for simplicity in investment approaches. He deliberately designed the Magic Formula to use only two metrics because he believed that adding complexity would not meaningfully improve returns but would make the system harder to follow consistently. He observed that many investors underperform not because they lack sophisticated strategies but because they lack the discipline to stick with any strategy through periods of underperformance. By keeping the formula simple, Greenblatt aimed to make it psychologically easier for investors to maintain discipline. He often notes that the Magic Formula will inevitably underperform the market over certain periods -- sometimes for two or three years at a stretch -- and that the simplicity of the system is what enables investors to trust it through these difficult periods rather than abandoning it at precisely the wrong time.
Source: "The Little Book That Beats the Market" (2005) by Joel Greenblatt
5.Long-Term Horizon Is Essential
The Magic Formula requires a minimum three to five year holding period to realize its statistical edge.
Greenblatt emphasizes that value strategies, including the Magic Formula, require patience to work. He presents data showing that while the formula outperformed the market in approximately 96 percent of rolling three-year periods in his backtesting study, it underperformed in roughly one out of every four individual years. In some calendar years, the strategy trailed the market by a meaningful amount. Greenblatt argues that this short-term underperformance is not a flaw but a feature -- it is precisely because the strategy is uncomfortable to follow during these periods that its long-term edge persists. If it were easy to stick with, everyone would do it, and the excess returns would be arbitraged away. He counsels investors to commit to a minimum three to five year time horizon before evaluating whether the approach is working.
Source: "The Little Book That Beats the Market" (2005) by Joel Greenblatt
6.Margin of Safety Through Diversification and Valuation
Spread investments across 20-30 positions and buy only when the price provides a significant discount to estimated value.
While Greenblatt's early career at Gotham Capital involved concentrated portfolios of special situations, his Magic Formula approach incorporates margin of safety through both valuation discipline and diversification. The formula's earnings yield criterion ensures that investors are only buying stocks at attractive valuations, while the recommendation to hold 20 to 30 positions at a time provides protection against the inevitable analytical errors that occur with any stock-picking approach. Greenblatt notes that even the best investors are wrong a significant percentage of the time, and that diversification is a practical tool for managing this reality without requiring each individual pick to be correct. He distinguishes this from excessive diversification, arguing that 20 to 30 positions is enough to reduce company-specific risk while still allowing each position to have a meaningful impact on overall portfolio returns.
Source: "The Little Book That Still Beats the Market" (2010) by Joel Greenblatt
Notable Quotes from Joel Greenblatt
“Choosing individual stocks without any idea of what you're looking for is like running through a dynamite factory with a burning match. You may live, but you're still an idiot.”
On the necessity of having a disciplined investment framework
“The magic formula works. It works because it makes sense. Buying good companies at bargain prices makes sense, and it also makes money.”
Summarizing the logic behind the Magic Formula
“The secret to investing is to figure out the value of something and then pay a lot less.”
Distilling value investing to its most fundamental principle
“If you just stick to buying good companies at bargain prices, you can pretty much ignore the rest.”
Advocating for simplicity in investment decision-making
“Spinoffs frequently result in extraordinary investment opportunities.”
On the structural mispricings created by corporate spinoffs
“Over the short term, Mr. Market acts like a wildly emotional guy who can buy or sell stocks at depressed or inflated prices. Over the long term, it's a completely different story: Mr. Market gets it right.”
Echoing Benjamin Graham's Mr. Market allegory to emphasize patience
Recommended Reading
The Little Book That Beats the Market
Joel Greenblatt (2005)
Greenblatt's most influential book introduces the Magic Formula investing strategy in a concise, accessible format. Written as though explaining the concept to his teenage children, the book demonstrates how ranking stocks by return on capital and earnings yield can produce market-beating returns over the long term. The backtested results show annualized returns of approximately 30.8 percent from 1988 to 2004. The book became a bestseller and brought systematic value investing to a mainstream audience.
You Can Be a Stock Market Genius
Joel Greenblatt (1997)
Despite its lighthearted title, this book is a sophisticated guide to special situations investing. Greenblatt shares his approach to finding opportunities in corporate spinoffs, restructurings, merger securities, recapitalizations, and other corporate events. Drawing on real-world examples from his career at Gotham Capital, the book explains how structural forces in the market create predictable mispricings that informed investors can exploit. It remains a foundational text for anyone interested in event-driven investing.
The Little Book That Still Beats the Market
Joel Greenblatt (2010)
An updated edition of Greenblatt's classic, this book revisits the Magic Formula with additional data covering the 2008 financial crisis. Greenblatt addresses common questions and objections raised by readers and professional investors, and provides updated performance data that continues to support the strategy's effectiveness. The book also includes more detailed guidance on implementation and discusses the behavioral challenges that prevent most investors from following the formula consistently.
The Big Secret for the Small Investor
Joel Greenblatt (2011)
In this book, Greenblatt tackles the challenge of creating value-weighted index funds that give ordinary investors exposure to his quantitative value approach without requiring them to pick individual stocks. He argues that traditional market-cap weighted index funds are inherently flawed because they give the greatest weight to the most overvalued companies. The book proposes an alternative approach that weights holdings based on measures of value rather than market capitalization.
Common Stocks and Uncommon Profits
Philip Fisher (1958)
While Greenblatt's approach is more quantitative than Fisher's qualitative scuttlebutt method, Fisher's emphasis on identifying high-quality businesses with durable competitive advantages influenced Greenblatt's inclusion of return on capital as a key metric in the Magic Formula. Fisher's framework for evaluating management quality and business durability complements Greenblatt's quantitative screens by providing a qualitative lens for understanding why certain companies earn high returns on capital.
Joel Greenblatt's Investment Checklist
High return on capital (ROIC)
The company should earn a high return on the capital it deploys in its business. Greenblatt measures this as EBIT divided by the sum of net fixed assets and net working capital. A high return on capital indicates that the company has a competitive advantage or operates an efficient business model. Look for companies that consistently earn well above their cost of capital.
Check this on Billiver →High earnings yield (low valuation)
The company should be available at a price that represents a high earnings yield relative to its enterprise value. Greenblatt calculates this as EBIT divided by enterprise value (market capitalization plus net debt). A high earnings yield means the investor is paying a bargain price for each dollar of the company's pre-tax operating earnings. Enterprise value is preferred over market cap because it accounts for the company's debt levels.
Check this on Billiver →Adequate diversification (20-30 stocks)
Greenblatt recommends holding a portfolio of 20 to 30 stocks to reduce the risk that any single investment mistake will significantly damage overall returns. This level of diversification provides meaningful protection against company-specific risks while still allowing each position to contribute to overall performance. The Magic Formula builds positions gradually, adding 5 to 7 stocks each quarter over the course of a year.
Annual rebalancing discipline
The Magic Formula requires selling winners after holding for one year and one day (to qualify for long-term capital gains treatment) and selling losers just before the one-year mark (to capture short-term capital losses). This systematic rebalancing ensures the portfolio continuously reflects the highest-ranked Magic Formula stocks and prevents emotional attachment to any individual position.
Exclude financial and utility companies
Greenblatt's Magic Formula screens exclude financial companies (banks, insurance companies, REITs) and utilities because their capital structures make the return on capital and earnings yield calculations less meaningful. Financial companies' leverage and regulatory capital requirements distort standard profitability metrics, while utilities' regulated returns limit the applicability of the formula.
Check this on Billiver →Minimum three to five year commitment
The Magic Formula requires investors to commit to following the strategy for at least three to five years before evaluating its effectiveness. Greenblatt's research shows the formula can underperform in roughly one out of every four years, and short evaluation periods may coincide with temporary underperformance. The statistical edge of the formula becomes evident only over multi-year periods, so patience and discipline are essential prerequisites for success.
Joel Greenblatt's Notable Investments
Host Marriott Corporation (Spinoff)
Early 1990sOne of Greenblatt's most frequently cited special situations investments involved the separation of Marriott Corporation into two entities: Marriott International (the hotel management business) and Host Marriott (the real estate and debt-heavy entity). When Marriott announced the spinoff in 1992, the transaction was controversial because Host Marriott would assume most of the parent company's debt. Bondholders sued, and institutional investors fled. Greenblatt recognized that the market was mispricing the situation -- Host Marriott retained significant real estate assets that exceeded the value of its debt, and the management company was being created as a high-quality, asset-light business.
Outcome: The spinoff created substantial value for investors who understood the dynamics. Both entities went on to perform well as independent companies, with Marriott International becoming one of the world's leading hotel companies and Host Marriott (later Host Hotels & Resorts) becoming a major lodging REIT. This investment exemplified Greenblatt's thesis that corporate restructurings create predictable mispricings.
Frequently Asked Questions
What is Joel Greenblatt's Magic Formula?
The Magic Formula is a quantitative value investing strategy developed by Joel Greenblatt and described in his 2005 book "The Little Book That Beats the Market." It ranks stocks using two criteria: return on capital (EBIT divided by net fixed assets plus net working capital) and earnings yield (EBIT divided by enterprise value). Investors select the highest-ranked stocks across both metrics, build a portfolio of approximately 20 to 30 positions over the course of a year, and rebalance annually. Greenblatt's backtesting showed the formula produced annualized returns of approximately 30.8 percent from 1988 to 2004, compared to 12.4 percent for the S&P 500.
What were Gotham Capital's returns under Joel Greenblatt?
Joel Greenblatt founded Gotham Capital in 1985, and the fund achieved annualized returns of approximately 50 percent per year before fees (about 40 percent after fees) over its first decade of operation from 1985 to 1995. This track record was built primarily through special situations investing, including corporate spinoffs, restructurings, and merger-related securities. In 1995, Greenblatt returned outside investor capital and continued managing money for himself and his partners.
How does the Magic Formula differ from traditional value investing?
Traditional value investing, as practiced by Benjamin Graham and Warren Buffett, typically involves qualitative analysis of individual companies, including assessment of management quality, competitive advantages, and business prospects. The Magic Formula takes a purely quantitative approach, using only two numerical metrics to rank and select stocks. Greenblatt designed it this way deliberately -- by removing subjective judgment from the process, the formula eliminates the behavioral biases and emotional decision-making that cause most investors to underperform. However, Greenblatt acknowledges that skilled investors who can perform thorough qualitative analysis may achieve even better results than the formula alone.
Why does the Magic Formula exclude financial companies and utilities?
The Magic Formula excludes financial companies (banks, insurance companies, REITs) and utilities because the return on capital calculation is not meaningful for these businesses. Financial companies operate with very high leverage as a core part of their business model, which distorts standard profitability metrics. Their "capital" has a fundamentally different meaning than it does for industrial or consumer companies. Utilities are excluded because their returns are regulated by government agencies, which limits the usefulness of return on capital as a measure of business quality. Including these sectors would introduce noise into the ranking system and potentially lead to misleading stock selections.
What is special situations investing as practiced by Joel Greenblatt?
Special situations investing involves identifying opportunities created by corporate events such as spinoffs, mergers, restructurings, bankruptcies, and recapitalizations. Greenblatt recognized that these events often create temporary mispricings because institutional investors may be forced to sell securities they receive (for example, spinoff shares that are too small for their mandates), analysts may not yet cover newly created entities, and the complexity of the situations deters many investors from doing the necessary research. By specializing in these events and conducting thorough fundamental analysis, Greenblatt was able to identify securities trading at significant discounts to their intrinsic value. He detailed this approach in his 1997 book "You Can Be a Stock Market Genius."
Does Joel Greenblatt teach investing, and where can his educational materials be found?
Yes, Joel Greenblatt has been an adjunct professor at Columbia Business School for over twenty years, where he teaches a highly popular course on special situations investing. His educational contributions extend beyond the classroom through his books, which include "You Can Be a Stock Market Genius" (1997), "The Little Book That Beats the Market" (2005), "The Little Book That Still Beats the Market" (2010), and "The Big Secret for the Small Investor" (2011). He also created the website magicformulainvesting.com, which allows individual investors to screen for Magic Formula stocks at no cost. His teaching and writing have helped make quantitative value investing concepts accessible to individual investors.
Explore Further on Billiver
Our editorial team includes professionals with backgrounds in finance, data analysis, and financial education. We focus on making investing concepts accessible while maintaining accuracy. All content undergoes multi-step review before publication.
- ✓Research using official sources (SEC filings, IRS publications)
- ✓Multi-step review for accuracy and clarity
- ✓No affiliate relationships or sponsored content
- ✓Regular updates when regulations or market data change
This content is for educational purposes only and does not constitute investment advice. Always consult with a qualified financial advisor for personalized guidance.
Content Attribution: Portions of this page use content from Wikipedia, which is available under the Creative Commons Attribution-ShareAlike 3.0 License. This content has been adapted and is also available under the same license.