Over-caution is the real trap when one sees a dialectical opposition between the presumption of market fraud and negative fraud tactics. It is a superficial reading that misses the conviction that the presumption of market integrity is an essential tool to combat all forms of price manipulation, not in opposition, but in synergy. Considering these concepts as antagonists is a misunderstanding of the law's purpose, which is to maintain price integrity and punish bad actors, whether they attempt to artificially inflate or deflate values. For example, for a Canadian pension fund, this presumption facilitates the pursuit of an issuer who deliberately caused the decline of its shares before a buyout, thus protecting our beneficiaries against information asymmetry.