Invest Like Charlie Munger Using His Four Filters

17 minutes

charlie munger four filters

“The difference between a good business and a bad business is that good business throw up one easy decision after another. The bad businesses throw up painful decisions time after time.”

Charlie Munger

We all want to know how to improve our investment decision making. How do we develop a better understanding of a company, its future, and present, its products? Over the years I have read all the Letters to Shareholders of Berkshire Hathaway. I have read most of the books and articles on Warren Buffett, and his mentor Benjamin Graham, and his partner Charlie Munger. I have also listened to hours of audio from interviews via Youtube. All in the effort to gain insights into how Warren Buffett developed their “framework” for investment decisions. And how they arrive at a winning investment decision.

During my research, I came across an interview that Charlie Munger gave to the BBC which discusses his thoughts on how a framework for making better decisions when making investment decisions. You can find the video here. The comments that we will be discussing occur at 5:59 of the video.

The framework is called the Four Filters, and it first appeared in the 1977 Letters to Shareholders in this form.

“We select our marketable securities in much the same way we would evaluate a business for acquisition in its entirety. We want the business to be (1) one that we can easily understand, (2) with favorable long-term prospects, (3) operated by honest and competent people, and (4) available at an attractive price.”

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