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URL:  http://boards.fool.com/i-agree-with-elan-in-the-assertion-that-you-30537704.aspx

Subject:  Re: performance of screens Date:  2/12/2013  8:09 AM
Author:  ProphetWise Number:  241549 of 258125

I agree with Elan in the assertion that you shouldn't make any general assumptions concerning screens based on bill2m's spreadsheet. As others have noted, a screen that does well as weekly hold, may not do well for other holding periods. As well, screen performance over time will vary depending on start date.

Elan's real point is that you can't make long term inferences about screen performance from bill2m's report of recent screen performance. That's why he recommends long term back-tests.

Some of the assumptions underlying each screen reflect investor's preferences. In the short run,