Interpret and contrast the Good and Bad investment risk potentials of an electric vehicle manufacturer whose shares have a PE ratio of 10:1 and a coal company whose stock has a PE ratio of 2.5 to 1. 1.The investment risk potentials of an electric vehicle manufacturer whose shares have a PE ratio of 10:1. 1 2. The investment risk potentials of a coal company whose stock has a PE ratio of 2.5 to 1.