Prof. benjamin graham one of the most well know person had did lits of efforts in their life. they had a very good knowledge of investing.
In the book, he had describe the golden rules and disciple of investing. he had describe how one of the most intelligent man was become full. sir issac newton who had made a great contribution towards the physics was failed in investment. however he had an good iq still investing for not a good option for him and also stated that investing is not generally based on your iq or sat score. its totally different, if u go through it , I gurranttee u will definatly improve your losses in stocks