The assertion of a logical opposition between the presumption of market fraud and negative stock market manipulation tactics is noise, masking what is actually controllable. The first is a procedural ease regarding trust in prices, while the second describes a manipulation strategy. There is no inherent logical contradiction; it is a matter of proving manipulation rather than an incompatibility of principles. Such a view simplifies the complexity faced by regulators, such as the AMF or the OSC, in proving intent. For example, proof of a prior agreement to manipulate stock prices downward before a buyback does not cancel the presumption but invalidates it in this specific case.