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Investment Strategies / Mechanical Investing❤
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Author: rayvt ✧🐝  😊 😞
Number: of 3958 
Subject: Re: GGT Timing update
Date: 11/04/2023 11:13 AM
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And because I don't know when to stop, here is all the changes to the Feb'2015 value:
(The 1st column is the number of months that had the same value.)
      2 rrsfs-2016-01-20: 2015-02-01 183651
      1 rrsfs-2016-02-19: 2015-02-01 183472
      2 rrsfs-2016-03-15: 2015-02-01 184318
      2 rrsfs-2016-04-13: 2015-02-01 183697
     17 rrsfs-2016-05-13: 2015-02-01 184176
      5 rrsfs-2017-02-15: 2015-02-01 184119
      9 rrsfs-2017-05-12: 2015-02-01 184362
      6 rrsfs-2018-02-14: 2015-02-01 184531
      8 rrsfs-2018-06-12: 2015-02-01 184592
      7 rrsfs-2019-02-14: 2015-02-01 184621
      8 rrsfs-2019-07-11: 2015-02-01 185061
      3 rrsfs-2020-02-14: 2015-02-01 184978
     12 rrsfs-2020-05-15: 2015-02-01 184982
     14 rrsfs-2021-04-26: 2015-02-01 185197
     14 rrsfs-2022-05-11: 2015-02-01 185154
      7 rrsfs-2023-04-24: 2015-02-01 185007

Ugh! Unless you have all the historical data this will play merry hell on backtests. I had no idea that FRED updated old values so much. They last updated the Feb 2015 value 7 (seven!) years after the initial report. Probably worse than that -- I only started collecting the FRED data in 2016.
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