What is 'Magic Formula Investing'
Magic Formula Investing is a rulesbased, moneymaking strategy that teaches investors a relatively simple and easy to understand method for value investing. It relies on quantitative screens of companies and stock, and is designed to beat the stock market's average annual returns.
BREAKING DOWN 'Magic Formula Investing'
The Magic Formula strategy was first described in the bestselling book "The Little Book That Beats The Market" (1980) and in the 2010 followup, "The Little Book That Still Beats The Market” by investor Joel Greenblatt. Founder and former fund manager at Gotham Asset Management, Greenblatt is a graduate of Wharton and an adjunct professor at Columbia University.
What’s in The Magic Formula?
Greenblatt's magic formula is designed to help investors in, as he put it in a 2006 interview with Barron’s, “buying good companies, on average, at cheap prices, on average.” Using this straightforward, nonemotional approach, investors screen for companies that are good prospects from a value investing perspective. In the book, Greenblatt outlines two criteria for stock investing: stock price and company cost of capital. Instead of conducting fundamental analysis of companies and stocks, investors use Greenblatt's online stock screener tool to select the 20 to 30 topranked companies in which to invest. Company rankings are based on their stock's earnings (which are calculated as earnings before interest and taxes) yield (calculated as earnings per share divided by the current stock price) and return on capital, which measures how efficiently they generate earnings from their assets. Since Greenblatt’s magic formula only applies to companies with market capitalizations greater than $100 million, it excludes small cap stocks. The remainder will all be large companies, and no financial companies, utility companies or nonU.S. companies will be included.
Investors using the strategy sell the losing stocks before they have held them for one year to take advantage of the income tax provision that allows investors to use losses to offset their gains. They sell the winning stocks after the oneyear mark, in order to take advantage of reduced income tax rates on longterm capital gains. Then they start the process all over again.
Does The Magic Formula Work?
According to Greenblatt, his magic formula investing strategy has generated annual returns of 30%. Though they differ in their calculation of returns from the strategy, a number of independent researchers have found that the magical formula investing approach has appeared to show good results compared to the S&P 500 when backtested.

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