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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: mungofitch ✹✺ SILVER
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Number: of 22354 
Subject: Re: Value Trend
Date: 05/02/23 12:14 PM
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No. of Recommendations: 13
(2) from looking at the trend line where the trend line is defined using data only available prior to each date?
The second one is "walk forward" and uses data only available to date.


Definitely this one...it would be useless otherwise, like one of the flaws of the dangerous/dumb "BMW method" charts with their crystal ball effect.

Similarly, in my tests the data for a given reporting period start getting used only when the statements are out, not when that financial quarter ended.

Jim
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This community has written 21,861 posts about Berkshire Hathaway. The article-length ones it recommended most:
BRK: Why Not XOM? · 62 recs · 2024
Second quarter comments · 60 recs · 2023
Berkshire's Profit Contributors · 58 recs · 2023
Summary of 2Q 2026 · 55 recs · 2026
3Q Summary · 53 recs · 2024
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