Investors in Lowe’s Cos. are hoping a new leader can bring the mojo back to a chain that has spent years in the shadow of rival Home Depot Inc.

 Shares of the home-improvement retailer jumped the most in more than a year on Monday after Lowe’s said Robert Niblock, a 25-year veteran of the company, will retire as chairman and chief executive officer. He will remain in those roles until a successor is found.