I've been a RW subscriber for about 2 months from January to March 2019.  I've noticed that while backtesting from 20-30 years to today seems to show a benefit to the program long term, the short term results of most of the strategies haven't outpaced the SP500 results lately, and in many cases fell well below the return.  When testing from Nov 1, 2018 to present, it's hard to find ANY that have shown to be superior to the SP500!  Which screeners have people found that will protect us from the inevitable market correction which will occur?  


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Marc064
at 07/06/19 12:31 AM : RE: Backtesting Danger

Tiger
at 07/03/19 2:24 PM : RE: Backtesting Danger

thymara
at 04/06/19 11:13 AM : RE: Backtesting Danger

Norman
at 06/30/19 7:54 PM : RE: Backtesting Danger

Chuck_L
at 06/29/19 8:33 AM : RE: Backtesting Danger


I am not a Zacks person.  I don't think there are any still on the site.  One piece of advice is to spend time reading the posts from the past.  You can learn a lot.  The database is supposed to be adjusted for survivorship bias.  When you do a backtest, bring up the list of stocks for a period.  There is a column that contains the letters A/D.  I have been told that they represent Alive (The company still exists) and Dead (Something happened to the company).  In other words, if a company existed on a date in the past, it is still supposed to come up in the results for the past. 

I have noticed that the screens don't seem to be working as well lately.  I hope it is temporary!


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