1/ Short Selling 101

With the markets continuing to rally, there has been more talk of “shorting” or “short selling” stocks.

But what does that mean and how does it work?

Here’s a quick educational primer: Short Selling 101

Circle of Competence 101

Warren Buffett and Charlie Munger often reference the importance of knowing the boundaries of your circle of competence.

But what is a Circle of Competence and how does it work?

Here's Circle of Competence 101!

1/ First, a few definitions.

A Circle of Competence is the set of topic areas that align with a person's expertise.

If the entire world of information were to be expressed in a circle, an individual's Circle of Competence is the small sub-circle that represents their expertise.

2/ The idea surfaced in the 1996 BH annual letter.

"You don’t have to be an expert on every company...you only have to be able to evaluate companies within your circle of competence. The size of that circle is not very important; knowing its boundaries, however, is vital."

3/ A Circle of Competence is built over time.

It is built through experience, reading, dedicated study, and effort.

It is dynamic, not static.

It can expand as you deepen your knowledge in new areas. It can contract if you fail to nurture your existing areas of expertise.

4/ To engage this mental model in your life, there are two key processes to go through:

(1) Identify what falls within your circle
(2) Identify the boundaries of your circle

(1) is all about figuring out what you know, while (2) is about humbly admitting what you don’t.

The most powerful paradoxes of life:

The Persuasion Paradox

Have you noticed that the most argumentative people rarely persuade anyone?

The most persuasive people don’t argue—they observe, listen, and ask questions.

Argue less, persuade more.

Persuasion is an art that requires a paintbrush, not a sledgehammer.

The Effort Paradox

You have to put in more effort to make something appear effortless.

Effortless, elegant performances are often the result of a large volume of effortful, gritty practice.

Small things become big things. Simple is not simple.

The Wisdom Paradox

“The more I learn, the more I realize how much I don't know.” — Albert Einstein

The more you learn, the more you are exposed to the immense unknown.

This should be empowering, not frightening.

Embrace your own ignorance. Embrace lifelong learning.

The Growth Paradox

Growth takes a much longer time coming than you think, and then it happens much faster than you ever would have thought.

Growth happens gradually, then suddenly.

When you realize this, you start to do things differently.

Logical fallacies are errors in reasoning that undermine the quality of an argument.

THREAD: 20 common logical fallacies to learn, identify, and avoid:

Ad Hominem

Latin for "to the person" - an attack of the person rather than the argument.

Instead of addressing the argument and its points and merits, the offender attempts to refute the opposition on the basis of personal characteristics.

All-too-common in politics.

The Texas Sharpshooter

A Texan fires a gun at a barn wall and then paints a target around the closest cluster of bullet holes to create the appearance of accuracy.

Selecting and highlighting evidence that supports the conclusion while ignoring evidence that may refute it.

The Bandwagon Fallacy

An assumption of truth on the basis of the majority of people believing it to be true.

"Everyone believes X, so obviously X is true."

Typically offered without regard for the qualifications or ability of the people in question to validate the claim.

Straw Man

The offender ignores the actual argument and replaces it with a flimsy, distorted, easily-refuted argument (a “straw man”).

By replacing a strong argument with a weak one, the offender can create the illusion of an easy, swift victory.

The Cantillon Effect is the most important economic concept you’ve never heard of.

Here's a breakdown of what it is (and why you should care):

1/ Richard Cantillon was an Irish-French economist and philosopher born in the 1680s.

He achieved success as a banker—which he attributed to the formidable connections made through his family and employer.

At a young age, he had learned of the impact of proximity to power...

2/ Around 1730, Cantillon wrote a paper—Essay on the Nature of Commerce in General—which is considered a foundational work in the study of the political economy.

It was widely circulated in manuscript form, though it was not published until 1755, well after his death.

3/ In the paper, Cantillon posited that the early recipients of new money entering an economy will benefit more significantly than those it trickles down to.

In other words, the "flow path" of the new money matters!

4/ In 18th century terms, those closest to the King—the source of money/power—benefitted first when new money entered the economy.

Broadly, Cantillon observed that new money creates distributional effects based on where it enters the system.

The Cantillon Effect was born...

The Icarus Paradox offers a critical lesson on business, investing, and life.

Here’s a simple breakdown:

The story of Icarus is a famous tale from Greek mythology.

Icarus is the son of a craftsman—Daedalus.

To help the pair escape from Crete, Daedalus uses feathers and wax to create two sets of wings.

Prior to the attempt, Daedalus warns his son to avoid complacency and hubris.

Daedalus instructs Icarus to avoid flying too low or too high—cautioning that the sea's moisture or the sun's heat could cause the wings to malfunction.

But Icarus becomes amazed by his flight and soars away.

The sun melts the wax on his wings and Icarus falls to his death.

The tale of Icarus offers a poignant lesson:

Avoid complacency and hubris at all times.

What makes you successful initially may eventually lead to your downfall.

This is often referred to as "The Icarus Paradox”—it shows up constantly in business, investing, and life:

In business, how many incumbents have we seen achieve success with one product, only to be disrupted when the market shifts under their feet?

Overconfidence and success blinds incumbents to the coming wave of disruption.

60+ companies from the 1966 Fortune 100 no longer exist!