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DIY Investor's Newsletter

DIY Investor

Beating the SPY and QQQ on the side as an engineer. I share lots of investment ideas and tools. If you are busy with life and work like me, but would like to achieve reasonable returns, this is the place to be. Join today!

Platform
Substack
PricingFreemiumPublishesTwice weekly
Issues74Foundeda year agoLast Issue12 days ago
Active

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Latest Issues

We are a Bunch of Sheep

I was recently reading an interview by Latticework’s John Mihaljevic with Michael Mauboussin about his book, More Than You Know. The part about behavioral finance was the most interesting to me, and I thought you might benefit from it too....

12 days ago
1
1

You know nothing, Jon Snow!

When you think you know but you don’t know, you also don’t know that you don’t know. And when you don’t think you know but you do, you also don’t know that you know.

Yeah. I had to read that three times too.

Turns out there’s a scientific...

16 days ago
18

Test Your Portfolio Against AI Disruption

Morningstar stress-tested 132 moats for AI disruption. I created a framework out of it so you can stress test your portfolio in seconds, for free.

Also, I mapped the results into a single dataset with fair values and 3-year return estimate...

21 days ago
17

How to Avoid Stupid Mistakes in Investing

This is a “Do as I say, not as I do” post. I hope my readers benefit from common-sense investing, if not me.

Here’s how I TRY to avoid stupid mistakes.

1. Invest in companies you already know.

Massive time saver. I ripped through Ado...

a month ago
19

How to Size Your Positions Honestly?

Companies surprise you. Industries transform overnight. Hello, AI. CFOs lie. Things happen and shit breaks.

Maybe you didn’t read the filings. You trusted a Substack writer who turned out to be wrong. Hey, could be me.

The stock drops 50%...

a month ago
18
4

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  • DIY Investor

    Beating the SPY and QQQ on the side as an engineer. I share lots of investment ideas and tools. If you are busy with life and work like me, but would like to achieve reasonable returns, this is the place to be. Join today!

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