A Practice Note examining the legal framework and procedural considerations for subject matter and personal jurisdiction in the context of civil securities fraud cases brought by private plaintiffs under Section 10(b) of the Securities Exchange Act of 1934, as amended, and its implementing regulation, Securities and Exchange Commission Rule 10b-5. The Note discusses recent developments shaping this area, including the US Supreme Court's ruling in Morrison v. National Australia Bank Ltd. and its progeny, and provides practical suggestions for navigating both substantive and procedural considerations in cases that raise jurisdictional issues.