Street Capitalist: Event Driven Value Investments

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Street Capitalist: Event Driven Value Investments

Ed Thorp: Bridge with Warren Buffett

I came across this great read from Ed Thorp on his experience meeting Warren Buffett. He talks a bit about the relationship between bridge and investing, which might by why Buffett enjoys it so much. I’ve been trying to learn about bridge myself (so far I’ve been reading Winning Contract Bridge). This is what Sharon Osberg, Buffett’s bridge partner says about the game:

Warren would tell you, playing bridge is like running a business. It’s about hunting, chasing, nuance, deception, reward, danger, cooperation and, on a good day, victory.

Bring Bridge Back to the Table (NYTimes)

Here is an excerpt from Thorp’s paper:

“Bridge players know that bridge is what mathematicians call a game of imperfect information. The bidding, which precedes the play of the cards, conveys information about the four concealed hands held by the two pairs of players that are opposing each other. Once play begins, players use information from the bidding and from the cards as they are played to deduce who holds the remaining as yet unseen cards. The stock market also is a game of imperfect information and even resembles bridge in that they
both have their deceptions and swindles. Like bridge, you do better in the market if you get more information, sooner, and put it to better use. It’s no surprise then that Buffett, arguably the greatest investor in history, is a bridge addict.”

The full paper is below:

Bridge With Buffet

Category: Mental Models, Warren Buffett

  • http://twitter.com/maxolson Max Olson

    Tariq, thanks for this.

    There are a lot of good papers on Thorp's site (http://edwardothorp.com/id10.html) if you haven't checked them out already. In some of his more recent papers discussing the Kelly criterion he talks about Pabrai's use of the method and some of the benefits/drawbacks of it. They can be heavily technical but still interesting if you're into the math side of it.

  • http://www.StreetCapitalist.com Tariq

    Thanks for the link Max. I have heard Thorp is featured prominently in Fortune's Formula. I still haven't gotten around to reading that book though.

  • Emiliano_S

    I was just going to tell you about the page Max shared, there are some good articles by Thorp there.

    Thank for this paper, also, something interesting i read some days ago, i cant remember where, but i remember perfectly that Buffett doesnt thinks that a good bridge player would be a good investor, but certainly there are similarities.

  • http://www.StreetCapitalist.com Tariq

    Personally, I think Texas Hold'em Poker is really analogous to investing. In Hold'Em, you have these crazy events that occur out of randomness. I am not sure if you have ever seen it on TV, where they show the little odds calculations in each corner for a player winning a particular hand.

    But sometimes a guy will have a 99% chance of winning, and one card will be dealt that totally evaporates his chances. It reminds me of how these black swan events can occur that will wipe out our investments. So we need to be really savvy and try to invest in a way that protects against that from happening.

  • Emiliano_S

    I really like poker, and i totally agree with you, although you can have 99% chance of winning the hand, nothings guarantee you that the 1% situation you lose is going to materialize next. The real problem is when the 1% hits your whole bankroll wiping you out. This, as you say, really highlights the importance of assesing risks very carefuly, the dificulty of cuantify it, and the importance of a MOS.

  • http://oldprof.typepad.com/a_dash_of_insight/ Jeff

    Very interesting paper. Thanks. It is possible to play against Mr. Buffett (and his friend Mr. Gates) in tournaments. They usually play at a “Regional” tournament in Council Bluffs, Iowa, across the river from Omaha. http://web2.acbl.org/tournaments/Ads/2010/08/10…

About Me

My name is Tariq Ali, I run Street Capitalist. I recently graduated from the University of Texas at Austin. There, I stumbled onto value investing via the school library. I read everything I could and now I'm here, writing out my thoughts and investment ideas.


I have a lot of heroes when it comes to investing, it seems like every investor has some kind of niche. Some, whose books and writings have had the biggest impact on me are: Warren Buffett, Benjamin Graham, Joel Greenblatt, Seth Klarman, and George Soros.


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