Peter Lynch's 8 principles for beating the market

(Why listen? He averaged 29% yearly returns running a mutual fund!!!)

1/12

1. Know what you own

This one frequently gets a "yeah, yeah" from me, but it's embarrassing how many "They do THAT?" moments I have.

Here's a test for every company you own...can you explain in detail how they make money AND how that's different than their competitors?

2/12
2. It's futile to predict the economy and interest rates (so don't waste time trying)

As I'm writing this, we're all wondering what the Fed's going to do.

You could read this a week, a month, or 10 years from now, and this would be true.

3/12
3. You have plenty of time to identify and recognize exceptional companies

Lynch mentions $WMT as an example...even way back when he wrote about it, it was a 10-bagger even if you waited 10 years AFTER its IPO.

Today, we can look at $AMZN or $NFLX.

4/12
4. Avoid long shots

LOVE this one.

It's so easy to get enamored with a stock's potential to 10-bag (e.g. hot industry, huge TAM, etc.), but we have to bump that against its chances for success.

5/12
Lynch claims he was 0-for-25 in investing in companies that had no revenue but a great story.

Combined with #3, that can mean waiting to see if the company can reach critical mass on execution and then buying at a higher future price with a greater chance of success.

6/12
5. Good management is very important; good businesses matter more

Of course, great management (especially founder leaders) can help build great businesses.

I know I didn't flinch when Jeff Bezos decided to step away from $AMZN's day-to-day.

7/12
6. Be flexible and humble, and learn from mistakes

This is different than constantly changing strategies.

Lynch: "In this business, if you're good, you're right six times out of 10. You're never going to be right nine times out of 10."

There are lessons in the losers!

8/12
7. Before you make a purchase, you should be able to explain why you're buying

...to an 11-year-old in three sentences.

Lynch: "Never invest in any idea you can’t illustrate with a crayon."

Personal e.g.: My Greenlight Framework forces me to organize my thoughts simply.

9/12
8. There's always something to worry about.

Lynch's e.g.: investors made a killing in the 1950s despite the very new threat of nuclear war.

Buffett started investing DURING WWII.

Lynch: "In the stock market, the most important organ is the stomach. It's not the brain."

10/12
These lessons sound SO simple and obvious

In a sentence, he's saying...

Focus on patiently, humbly, consistently vetting and buying great companies.

But executing them is SO hard.

Revisiting this list from time to time helps me.

11/12
More from me...

https://t.co/atO9nThDj1

https://t.co/cufyjakuTR

12/12

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THREAD: 12 Things Everyone Should Know About IQ

1. IQ is one of the most heritable psychological traits – that is, individual differences in IQ are strongly associated with individual differences in genes (at least in fairly typical modern environments). https://t.co/3XxzW9bxLE


2. The heritability of IQ *increases* from childhood to adulthood. Meanwhile, the effect of the shared environment largely fades away. In other words, when it comes to IQ, nature becomes more important as we get older, nurture less.
https://t.co/UqtS1lpw3n


3. IQ scores have been increasing for the last century or so, a phenomenon known as the Flynn effect. https://t.co/sCZvCst3hw (N ≈ 4 million)

(Note that the Flynn effect shows that IQ isn't 100% genetic; it doesn't show that it's 100% environmental.)


4. IQ predicts many important real world outcomes.

For example, though far from perfect, IQ is the single-best predictor of job performance we have – much better than Emotional Intelligence, the Big Five, Grit, etc. https://t.co/rKUgKDAAVx https://t.co/DWbVI8QSU3


5. Higher IQ is associated with a lower risk of death from most causes, including cardiovascular disease, respiratory disease, most forms of cancer, homicide, suicide, and accident. https://t.co/PJjGNyeQRA (N = 728,160)
"I lied about my basic beliefs in order to keep a prestigious job. Now that it will be zero-cost to me, I have a few things to say."


We know that elite institutions like the one Flier was in (partial) charge of rely on irrelevant status markers like private school education, whiteness, legacy, and ability to charm an old white guy at an interview.

Harvard's discriminatory policies are becoming increasingly well known, across the political spectrum (see, e.g., the recent lawsuit on discrimination against East Asian applications.)

It's refreshing to hear a senior administrator admits to personally opposing policies that attempt to remedy these basic flaws. These are flaws that harm his institution's ability to do cutting-edge research and to serve the public.

Harvard is being eclipsed by institutions that have different ideas about how to run a 21st Century institution. Stanford, for one; the UC system; the "public Ivys".