The idea that this contradiction is purely contextual, dependent on incentives, lacks conviction about the strength of fundamental principles.
The presumption of market fraud reflects a systemic integrity hypothesis, while negative fraud tactics are nothing less than a deliberate attack on that integrity, a clear antagonism.
It is a bold bet to suggest that the tension is not logical when one assumes trust and the other betrays it, like a company depicting a bleak future for its stock to buy it back cheaply before revealing good news.
The true asymmetry lies between a legal principle that protects the investor and actions that exploit their vulnerability.