Lincoln National has delivered a powerful share price run over the past few years, which puts fresh focus on what investors are really paying for its earnings today. With the stock now trading around its recent level of US$40.88, the key issue is whether that price still lines up with what the business is generating in profit.

• Over the past 3 years, Lincoln National has returned about 99.4%, which puts a lot of weight on whether its current earnings can support that kind of move.
• The insurer’s valuation now leans heavily on the durability of its underwriting results, fee income and investment returns, because those cash flows shape how much profit can reasonably be attached to each share.
• The analysts covering Lincoln National have…