lizgdal wrote: "For comparison between GTR1 and P123, I plan on looking at the correlation of monthly excess returns (monthly return minus benchmark return). I will also compare CAGR across multiple screens. I expect P123 and GTR1 to match close enough for my purposes."

TGMark wrote: "I am interested to see what you find. For screens that are picking stocks, I tend to want to see pretty good agreement in which tickers are picked."

I've finished my testing, and will post details in a separate thread (maybe in about a week). P123 and GTR1 match closely enough for my purposes. I mostly avoid nano caps (market cap < $50 million), and so did not do much testing on those. I found some implausible returns, but those are mostly avoided with the usual liquidity criteria (e.g. Price above 1).

The tickers are unlikely to match. I would expect about 50% agreement on average, with a range from 0% to 100% agreement. Even something as simple as Market Cap is difficult to match.

=== links ===
Important Update: Transition to FactSet Market Cap, Feb 6, 2026
community.portfolio123.com - Important update transition to factset market cap

Author: borisnand
Subject: Comparing GTR1 picks and SI Rankings
Date: 6/1/2016
"Overall, there is good agreement between the Rankings and GTR1, with 56% Jaccard index on average."
Jaccard index = (number of picks common to both lists) / (number of picks in combined list)
or put another way:
Jaccard index = size of the intersection divided by the size of the union of the sample sets
https://yorickm.com/Message.php?pid=32264724

Author: borisnand
Subject: Comparing GTR1 results and Weekly Trade Ledgers
Date: 6/1/2016

       screen         CAGR_L  CAGR_G  GSD  Jaccard
      Fried_500         17%     14    31     100%
      OptiMan           7%      5     28     100%
    Steady_Growth       3%      1     21     100%
        Bob             15%     13    25     96%
   P/SLove_You       11%     12    27     92%
      PIH_Naked         11%     12    32     92%
     CANSLIM-26         5%      4     21     90%
  Gentle_Screamers      21%     22    26     82%
      GS_Mungo          15%     9     22     82%
    GS_Mungo_Voom       14%     8     22     82%
  Microcap_Momentum     31%     17    43     79%
        POG             8%      7     37     79%
      Shrinkage         9%      11    26     79%
    Turnarounds         4%      6     36     79%
    Small_Value         12%     8     32     76%
       FCF-26           13%     6     30     72%
  Quality_Earnings      12%     10    32     72%
      Melange           5%      10    36     67%
Net-Nets_Grahamified    22%     21    30     64%
        POI             19%     18    37     61%
  Silver_Parachute      11%     13    26     61%
  Value_at_the_Top      12%     12    19     61%
        ARS             7%      8     24     56%
        GSX             13%     15    23     47%
        GSX2            13%     19    24     43%
      Zweig-26          1%      -4    20     43%
      S&P_Peg           3%      4     29     19%
      Z26saTA           -1%     -2    22     18%
        Up5X3           29%     23    32     15%
      Low_Mult          21%     27    24     9%
        78RPM           12%     14    34     4%
High_Relative_Value     25%     30    21     4%
        Up_5%           12%     17    33     4%
      WK_Voom           17%     20    26     0%
      average           13%     12    28     60%

https://yorickm.com/Message.php?pid=32264753

Author: rrjjgg
Subject: Re: GTR1 verification needed
Date: 3/19/2017
"I`ll just assume that [Microcap_Momentum] is too chaotic to be easily backtested and should be avoided."
https://yorickm.com/Message.php?pid=32642718