The RP ratio is the yield of the stock divided by the square root of the price. As of March 5, I would chose International Paper, Du Pont, Caterpillar Inc, and Eastman Kodak. These are stocks 2-5 on the list. The reason that this method works is because the stocks with the highest yield tend to be the better performing stocks. By di viding bye the square root you are, in effect, singling out the stocks with the greatest volatility.
Volatility is the measure of how fast a stock moves up or down.