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The week's question
In March 2025, in the thread "Re: OT, out", Umm asked the members: "Do you think it is because America is made up of magical soil that makes businesses based in America magically profitable?" This week it is put to everyone again. The button below opens the small thread re-asking it - read what others have said so far, then give your own answer as an ordinary reply.
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Stocks A to Z / Stocks B / Berkshire Hathaway (BRK.A)
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Author: Mark ☼  😊 😞
Number: of 22353 
Subject: Re: o/t, I have been touting ADX and CET
Date: 12/26/25 2:20 PM
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I'll give another example. Let's say that on 1/1 you loan me $100 and we agree to a 10% interest rate with the interest being paid immediately and that I have to pay you back by 12/31. Do we agree that your return/yield on your $100 is 10%?

But it ISN'T 10%!!!

He is loaning $90 ($100 - $10) on 1/1 and you are paying back $100 on 12/31. That's more than 10%, it's closer to 11.1% (IRR).

Time goes by and it is 12/31 and I don't have the $100 to pay you. You're flexible. You say OK how about if we extend the loan 1 year but you have to pay me $12 this time and can pay me back the $100 on 12/31 of next year.

What is your return/yield on your $100 in year 2? I could be wrong but I would say that it is 12%. Are you going to tell me that it is still 10%?


Again, it isn't correct. In the second year, he is loaning $88 ($100 - $12) on 1/1, and receiving $100 back on 12/31. That would be a yield of about 13.6% (IRR).
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This community has written 21,861 posts about Berkshire Hathaway. The article-length ones it recommended most:
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