Using overall market health to time stock screens

Parker from Texas sent me his ideas on selectively going long with AAII stock screens:

AAII stock screens are long-only. Which is great in uptrends. And spotty in downtrends. So, I fooled around and came up with a screen which tells me when to use the AAII screens. Here it is - one simple question:

On the monthly chart, did the S&P close above its 12 month simple moving average? If yes, use the AAII screens for the next month. If no, sit out or short the market. Here’s a chart:

Using this method, you would have gotten the signal to go long on 11/1/98 and get out 10/31/00. Here's how selected AAII screens fared over that 24 month period:

Zweig = +103.8% (~43% per year)
CANSLIM = +117.1%
Est Rev Up 5% = +243.9%
Tiny Titans = +133.3%

Note - the S&P went from ~1100 to ~1425 in this period, a 29.5% gain (~14% a year).

The next buy signal was on May 1, 2003 and lasted until 12/31/07. Here's the cumulative performance over 4 years, 8 months, re-balancing and reinvesting every month:

Zweig = +362.2% (~39% a year)
CANSLIM = +199.0%
Est Rev Up 5% = +350.5%
Tiny Titans = +381.2%

Note, the S&P went from ~910 to ~1460 during this time, a gain of 60.4% (~11% a year).

Had you shorted the S&P on 11/1/00 at ~1425, you would have covered at ~910 on April 30, 2003, picking up a nice profit while you wait to implement the screens again.

Under the same principles, you would have shorted on ~1460 on Jan 1, 2008 and be sitting pretty with the S&P at 860 right now.

So there you have it - a simple 12 month moving average screen on the screens. Unfortunately, it may be awhile before the S&P closes above its 12 month average.