The Mission Group (LON:TMG) share price has done well in the last month, posting a gain of 30%. Looking back a bit further, we're also happy to report the stock is up 61% in the last year.

All else being equal, a sharp share price increase should make a stock less attractive to potential investors. While the market sentiment towards a stock is very changeable, in the long run, the share price will tend to move in the same direction as earnings per share. So some would prefer to hold off buying when there is a lot of optimism towards a stock. One way to gauge market expectations of a stock is to look at its Price to Earnings Ratio (PE Ratio). Investors have optimistic expectations of companies with higher P/E ratios, compared to companies with lower P/E ratios.

See our latest analysis for Mission Group

How Does Mission Group's P/E Ratio Compare To Its Peers?

We can tell from its P/E ratio of 15.51 that sentiment around Mission Group isn't particularly high. The image below shows that Mission Group has a lower P/E than the average (23.1) P/E for companies in the media industry.

Mission Group's P/E tells us that market participants think it will not fare as well as its peers in the same industry. While current expectations are low, the stock could be undervalued if the situation is better than the market assumes. You should delve deeper. I like to check if company insiders have been buying or selling.

How Growth Rates Impact P/E Ratios

P/E ratios primarily reflect market expectations around earnings growth rates. Earnings growth means that in the future the 'E' will be higher. That means even if the current P/E is high, it will reduce over time if the share price stays flat. And as that P/E ratio drops, the company will look cheap, unless its share price increases.

It's great to see that Mission Group grew EPS by 19% in the last year. And earnings per share have improved by 4.7% annually, over the last five years. This could arguably justify a relatively high P/E ratio.

A Limitation: P/E Ratios Ignore Debt and Cash In The Bank

It's important to note that the P/E ratio considers the market capitalization, not the enterprise value. So it won't reflect the advantage of cash, or disadvantage of debt. Hypothetically, a company could reduce its future P/E ratio by spending its cash (or taking on debt) to achieve higher earnings.

Such expenditure might be good or bad, in the long term, but the point here is that the balance sheet is not reflected by this ratio.

Is Debt Impacting Mission Group's P/E?

Net debt totals just 5.9% of Mission Group's market cap. It would probably trade on a higher P/E ratio if it had a lot of cash, but I doubt it is having a big impact.

The Bottom Line On Mission Group's P/E Ratio

Mission Group has a P/E of 15.5. That's below the average in the GB market, which is 18.6. The company hasn't stretched its balance sheet, and earnings growth was good last year. If the company can continue to grow earnings, then the current P/E may be unjustifiably low. Since analysts are predicting growth will continue, one might expect to see a higher P/E so it may be worth looking closer. What we know for sure is that investors have become more excited about Mission Group recently, since they have pushed its P/E ratio from 11.9 to 15.5 over the last month. If you like to buy stocks that have recently impressed the market, then this one might be a candidate; but if you prefer to invest when there is 'blood in the streets', then you may feel the opportunity has passed.

Investors have an opportunity when market expectations about a stock are wrong. If it is underestimating a company, investors can make money by buying and holding the shares until the market corrects itself. So this free visual report on analyst forecasts could hold the key to an excellent investment decision.

Of course you might be able to find a better stock than Mission Group. So you may wish to see this free collection of other companies that have grown earnings strongly.

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned.

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