In the case of Morgan Stanley & Company, Incorporated, et al. v. Pacific Mutual Life Insurance Company in 1993, the U.S Supreme Court addressed a dispute over securities transactions between investment bank Morgan Stanley and insurer Pacific Mutual Life. The issue at hand was whether federal law preempted state-law claims for fraud and negligent misrepresentation related to alleged violations of Securities Exchange Act Rule 10b-5 by Morgan Stanley during private securities sales to institutional investors like Pacific Mutual. The court ruled that federal law did not preclude such state-law claims because Congress had intended both federal and state laws to coexist in this area when it enacted the Securities Litigation Uniform Standards Act (SLUSA). Therefore, even though there were potential violations under Rule 10b-5 which is governed by Federal Law, victims could still seek remedies under their respective State Laws for fraudulent or misleading conduct associated with these transactions.

In the dissenting opinion for Morgan Stanley & Company, Incorporated, et al. v. Pacific Mutual Life Insurance Company, Justice Scalia disagreed with the majority's decision to uphold a punitive damages award against Morgan Stanley. He argued that this case should have been governed by federal common law rather than state law because it involved a nationally chartered bank and thus had significant federal interest. Furthermore, he contended that under federal common law principles of fairness and uniformity in securities transactions, punitive damages should not be awarded unless there was evidence of intentional misconduct or reckless disregard for others' rights on part of the defendant - which wasn't proven in this case according to him. Therefore, he concluded that upholding such an excessive punitive damage award without clear proof of egregious conduct undermined basic principles of justice and equity.