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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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Investment Strategies / Mechanical Investing
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Author: RAMc ✭  😊 😞
Number: of 6243 
Subject: Re: standard SIP screen postmortem
Date: 01/16/24 3:48 PM
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No. of Recommendations: 8
lizgdal, Thanks for posting postmortem of our declining performance of the screens.
Way back in time I used a what’s working lately methods of selecting which screens
to use. Just to torture myself I loaded your results into an excel spread sheet and:
Each year selected the 4 screens the had the average weighted gains over the last three
Years weighted by 4*last year,+3*the year beforeand 2* 3years before.
10 years 1994 thru 2003 CAGR = 52%
10 years 2004 thru 2013 CAGR = 38.5%
10 years 2014 thru 2023 CAGR = 4.6%
The screens are dead replaced by more sophisticated analysists with better techniques.

RAM
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This community has written 6,227 posts about Mechanical Investing. The article-length ones it recommended most:
Dividend investing · 52 recs · 2025
Non-Mag7 screen · 34 recs · 2025
OT - Div yields and returns · 32 recs · 2024
Using AI to generate backtesting programs · 30 recs · 2025
Rankings for 19Dec2022 · 29 recs · 2022
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