Corporate America is cheering a recent victory by JDS Uniphase over aggrieved shareholders in a rare class-action securities lawsuit that actually went to trial—an outcome that may embolden other companies to fight class-action lawsuits as well.

Corporate America is cheering a recent victory by JDS Uniphase over aggrieved shareholders in a rare class-action securities lawsuit that actually went to trial—an outcome that may embolden other companies to fight class-action lawsuits as well.