Marginson v Ian Potter & Co

Marginson v Ian Potter & Co concerned a dispute between the plaintiff, Marginson, and the defendant, Ian Potter & Co, a stockbroking firm. The plaintiff sought to recover damages for losses allegedly suffered as a result of the defendant's negligence in advising him to purchase shares in a company that subsequently collapsed. The matter was heard by the Full Court of the Supreme Court of New South Wales.

The central legal issue before the court was whether the defendant owed a duty of care to the plaintiff in providing investment advice, and if so, whether that duty had been breached, leading to the plaintiff's financial loss. Specifically, the court had to consider the scope of the duty of care owed by a stockbroker to a client in circumstances where the advice given was unsolicited or where the client was experienced in share market dealings.

The court's reasoning focused on the established principles of negligence, particularly the foreseeability of harm and the proximity between the parties. It was held that a stockbroker, by holding themselves out as possessing expertise, assumes a responsibility to exercise reasonable care and skill in providing advice. The court found that the defendant had breached this duty by failing to adequately investigate the financial position of the company and by failing to warn the plaintiff of the inherent risks associated with the investment. The principles of *Donoghue v Stevenson* and subsequent developments in the law of negligence concerning professional advice were applied.

The court found in favour of the plaintiff and ordered that the defendant pay damages to compensate the plaintiff for the losses incurred as a result of the negligent advice.