Abbott Laboratories and Reckitt Benckiser Group Plc shares fell as a judge ordered a new trial after rejecting a verdict that had cleared the companies of liability over claims they hid potential risks of their premature-infant formulas.

Key Takeaways Infant formula makers Abbott and Reckitt saw their stocks decline Friday after a judge ruled plaintiffs could pursue a new trial against the companies.A jury in October found the companies not liable in a case alleging their infant formula products caused necrotizing enterocolitis,