Looking into the current session, Chevron Inc. (NYSE:CVX) shares are trading at $102.02, after a 1.20% spike. Moreover, over the past month, the stock increased by 11.99%, but in the past year, fell by 15.80%. Shareholders might be interested in knowing whether the stock is undervalued, even if the company is performing up to par in the current session.

The stock is currently higher from its 52 week low by 97.71%. Assuming that all other factors are held constant, this could present itself as an opportunity for investors trying to diversify their portfolio with Integrated Oil & Gas stocks, and capitalize on the lower share price observed over the year.

Most often, an industry will prevail in a particular phase of a business cycle, than other industries.

Chevron Inc. has a better P/E ratio of 48.47 than the aggregate P/E ratio of 10.81 of the Integrated Oil & Gas industry. Ideally, one might believe that Chevron Inc. might perform better in the future than its industry group, but it’s probable that the stock is overvalued.

There are many limitations to P/E ratio. It is sometimes difficult to determine the nature of the earnings makeup of a company. Shareholders might not get what they're looking for, from trailing earnings.