My probability of a direct trigger link between the Basic Inc. case and the 2017 securities fraud litigations is conditional, with a confidence band of 60-75% for an indirect influence, but only 20-30% for a direct trigger. The regulatory context and market mechanisms have significantly evolved, making such a direct causality unlikely as a base rate. The 'fraud-on-the-market' doctrine established by Basic Inc. is a relevant precedent, but the 2017 cases stem from a much more complex legal and technological ecosystem. For example, increased transparency requirements post-MIFID II in the EU illustrate how frameworks evolve independently of prior isolated cases.