Which statistical tool to use if I want to evaluate success of an investment strategy?

#1
I am doing a paper on value investing and want to analyse its success or failure. I have say share price of some 50 shares in 2014 and their share prices in 2019. These shares were selected on the basis of certain parameters, ratios. Now obviously some of the shares may have given positive returns and some negative returns in these five years. I wish to comment on the success or failure of the strategy. I want to conclude that shares selected on the basis of their PE ratio were a success (or a failure). What tool should I use to conclude this?
I am completely new to research and statistics so even a little help would be appreciated.