Looking into the current session, MetLife Inc. (NYSE:MET) shares are trading at $77.10, after a 7.31% drop. Over the past month, the stock decreased by 6.52%, but over the past year, it actually increased by 30.00%. With questionable short-term performance like this, and great long-term performance, long-term shareholders might want to start looking into the company's price-to-earnings ratio.

Comparing MetLife P/E Against Its Peers

The P/E ratio is used by long-term shareholders to assess the company's market performance against aggregate market data, historical earnings, and the industry at large. A lower P/E could indicate that shareholders do not expect the stock to perform better in the future or it could mean that the company is undervalued.

Compared to the aggregate P/E ratio of 19.3 in the Insurance industry, MetLife Inc. has a higher P/E ratio of 22.6. Shareholders might be inclined to think that MetLife Inc. might perform better than its industry group. It's also possible that the stock is overvalued.

In summary, while the price-to-earnings ratio is a valuable tool for investors to evaluate a company's market performance, it should be used with caution. A low P/E ratio can be an indication of undervaluation, but it can also suggest weak growth prospects or financial instability. Moreover, the P/E ratio is just one of many metrics that investors should consider when making investment decisions, and it should be evaluated alongside other financial ratios, industry trends, and qualitative factors. By taking a comprehensive approach to analyzing a company's financial health, investors can make well-informed decisions that are more likely to lead to successful outcomes.