Warren Buffett on Efficient Market Hypothesis

According to the proponents of the Efficient Market Hypothesis, stock prices reflect all available information about companies and investors can’t beat the market indexes by stock picking. They say investors trying to find a secret formula are wasting their time because stock prices follow a random walk. Interestingly, this theory also implies that a monkey selecting stocks by throwing darts at a newspaper’s financial pages should perform as well as any star hedge fund manager who may or may not use inside information.

Warren Buffett

You could guess how this was such a huge relief for millions of stock market investors. Suddenly, one need not worry about timing or stock picking skills. Since all the information is incorporated into stock prices, there’s no need to do any research about the companies, or the macro economic developments, or the regulatory environment. Nothing, nada. Do you want to invest in an internet start-up that sells toys, with $30 million in revenue, $50 million in losses and $6 billion in market cap? Don’t worry. Markets are efficient. Just buy it, as simple as that.

In 1984, Warren Buffett gave a speech at the Columbia Business School, arguing that the superinvestors of Graham-and-Doddsville can beat the market by a huge margin. The “look for values with a significant margin of safety relative to prices” approach has been deemed out of date by college professors such as Eugene Fama. Yet Warren Buffett and several investors who took Ben Graham’s course managed to beat index funds by following the value approach.

Twenty six years ago Warren Buffett said that 9 investors independently investing in different companies achieved far superior returns than did index funds. He said:

“So these are nine records of “coin-flippers” from Graham-and-Doddsville. I haven’t selected them with hindsight from among thousands. It’s not like I am reciting to you the names of a bunch of lottery winners — people I had never heard of before they won the lottery. I selected these men years ago based upon their framework for investment decision-making. I knew what they had been taught and additionally I had some personal knowledge of their intellect, character, and temperament. It’s very important to understand that this group has assumed far less risk than average; note their record in years when the general market was weak. While they differ greatly in style, these investors are, mentally, always buying the business, not buying the stock. A few of them sometimes buy whole businesses. Far more often they simply buy small pieces of businesses. Their attitude, whether buying all or a tiny piece of a business, is the same. Some of them hold portfolios with dozens of stocks; others concentrate on a handful. But all exploit the difference between the market price of a business and its intrinsic value”

I’m convinced that there is much inefficiency in the market. These Graham-and-Doddsville investors have successfully exploited gaps between price and value. When the price of a stock can be influenced by a “herd” on Wall Street with prices set at the margin by the most emotional person, or the greediest person, or the most depressed person, it is hard to argue that the market always prices rationally. In fact, market prices are frequently nonsensical.”

Finally, here’s the quote of the month from Warren Buffett:

“Ships will sail around the world but the Flat Earth Society will flourish. There will continue to be wide discrepancies between price and value in the marketplace, and those who read their Graham & Dodd will continue to prosper.”

blog comments powered by Disqus
Insider Monkey Headlines
Insider Monkey Small Cap Strategy
Insider Monkey Small Cap Strategy

Insider Monkey beat the market by 52 percentage points in 24 months Click to see monthly returns in table format!

Lists

10 Most Influential Papers In Economics

Top 8 Biggest Charities in the US

10 Worst Celebrity Career Moves Ever

Top 10 Best Paid Tennis Stars in the World

10 Cities with High Demand for Nurses

6 of the Worst Greeting Card Messages Ever Crafted

6 Ways to Make Money in ArcheAge and Build Your Empire

10 Foods To Eat To Lower Cholesterol Levels

The 10 Most Hated Television Characters of All Time

The 30 Worst Halloween Costume Ideas Ever Brought to Horrible Life

10 Vocational Skills in Demand Today with Jobs Waiting to be Filled

10 Best Places to Visit in Central and South America

The 10 Greatest Empires in History Which Nearly Conquered the World

The 6 Cheapest Boarding Schools In America 2015

5 Clear Reasons LoL is Better than DotA, Continues to Rule MOBAs

The Only 9 Teams with a Chance to Win the Super Bowl

The 15 Most Common Phobias in America that Induce Fits of Panic

Top 6 Least Expensive Tourist Destinations in 2014

Jim Goetz, Peter Fenton, Jim Breyer: Top 6 Venture Investors for 2014

Top 15 Billionaires in 2014

5 Pitfalls To Avoid When Buying a Franchise

Top 20 Medical Schools in the US – 2014 Rankings

4 Business Strategies that Turned Jamie Oliver into the World’s Richest Chef

6 Qualities That Make You A Good Team Player

10 High Paying Seasonal Jobs in America this Holiday Season

The 10 Busiest Shipping Lanes in the World

5 Most Valuable Brands in China

The 10 States with Highest Substance Abuse Rates Crippling Their Populace

The Top 10 Things to Do Before You Die That Will Echo for Eternity

The 10 Best Selling Items on Etsy

Top 10 Things to Do in Tokyo, the Greatest City in the World

10 Mistakes on Social Media that Can Harm You and Will Probably Get You Canned

The 10 Best Cities to Find Jobs in 2014

The 10 Most Controversial Songs Of All Time to Hit (and get Banned from) the Airwaves

The 20 Biggest IPOs in US History

The 10 Best Places to Visit in Mexico that Are Beautiful and Safe

7 Bad Habits that Age You Beyond Your Years

The 40 Best Fortune Cookie Sayings That Will Leave You Bemused, Befuddled, or Beguiled

10 Foods to Eat Before a Workout to Make Every Drop of Sweat Count

The 5 Best Documentaries On Netflix You Must See

The Most Heartwarming and Inspirational Story Of This Halloween Season, It Will Make You Cry and Jump For Joy

10 Best Party Songs of All Time to Bring the House Down With

5 New World Order Conspiracy Theories that Will Strangle the World

The 10 Highest Rated Movies of 2014

The 10 Largest Container Shipping Companies in the World

The 10 Largest Armies in the World: Who Should We Be Afraid Of?

Best Warren Buffett Quotes on Money You Need to Hear

The 10 Highest Suicide Rates by Profession

The 20 Most Underrated Movies of All Time

The 10 Fastest Growing Companies in America

Subscribe

Enter your email:

Delivered by FeedBurner

X

Thanks! An email with instructions is sent to !

Your email already exists in our database. Click here to go to your subscriptions

Insider Monkey returned 47.6% in its first year! Wondering How?

Download a complete edition of our newsletter for free!