MDU Resources' (MDU) systematic investments should further improve the reliability of services to help better serve the company's growing customer base. The company's focus on regulated energy delivery should boost overall performance. However, this Zacks Rank #3 (Hold) company faces risks related to aging infrastructure and seasonality of business operations. MDU's Tailwinds MDU is focused on safely meeting customer demand by upgrading and expanding its electric and natural gas infrastructure. MDU Resource ...