A Sliding Share Price Has Us Looking At MKS Instruments, Inc.'s (NASDAQ:MKSI) P/E Ratio

Unfortunately for some shareholders, the MKS Instruments (NASDAQ:MKSI) share price has dived 31% in the last thirty days. The recent drop has obliterated the annual return, with the share price now down 6.9% over that longer period.

All else being equal, a share price drop should make a stock more attractive to potential investors. In the long term, share prices tend to follow earnings per share, but in the short term prices bounce around in response to short term factors (which are not always obvious). So, on certain occasions, long term focussed investors try to take advantage of pessimistic expectations to buy shares at a better price. Perhaps the simplest way to get a read on investors' expectations of a business is to look at its Price to Earnings Ratio (PE Ratio). A high P/E ratio means that investors have a high expectation about future growth, while a low P/E ratio means they have low expectations about future growth.

Check out our latest analysis for MKS Instruments

Does MKS Instruments Have A Relatively High Or Low P/E For Its Industry?

We can tell from its P/E ratio of 31.83 that there is some investor optimism about MKS Instruments. You can see in the image below that the average P/E (25.2) for companies in the semiconductor industry is lower than MKS Instruments's P/E.

MKS Instruments's P/E tells us that market participants think the company will perform better than its industry peers, going forward. The market is optimistic about the future, but that doesn't guarantee future growth. So investors should always consider the P/E ratio alongside other factors, such as whether company directors have been buying shares.

How Growth Rates Impact P/E Ratios

Earnings growth rates have a big influence on P/E ratios. If earnings are growing quickly, then the 'E' in the equation will increase faster than it would otherwise. Therefore, even if you pay a high multiple of earnings now, that multiple will become lower in the future. A lower P/E should indicate the stock is cheap relative to others -- and that may attract buyers.

MKS Instruments's earnings per share fell by 64% in the last twelve months. But EPS is up 3.4% over the last 5 years.

Remember: P/E Ratios Don't Consider The Balance Sheet

It's important to note that the P/E ratio considers the market capitalization, not the enterprise value. Thus, the metric does not reflect cash or debt held by the company. In theory, a company can lower its future P/E ratio by using cash or debt to invest in growth.

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.

How Does MKS Instruments's Debt Impact Its P/E Ratio?

MKS Instruments has net debt worth just 8.2% of its market capitalization. The market might award it a higher P/E ratio if it had net cash, but its unlikely this low level of net borrowing is having a big impact on the P/E multiple.

The Bottom Line On MKS Instruments's P/E Ratio

MKS Instruments has a P/E of 31.8. That's higher than the average in its market, which is 13.3. With a bit of debt, but a lack of recent growth, it's safe to say the market is expecting improved profit performance from the company, in the next few years. What can be absolutely certain is that the market has become significantly less optimistic about MKS Instruments over the last month, with the P/E ratio falling from 45.8 back then to 31.8 today. For those who don't like to trade against momentum, that could be a warning sign, but a contrarian investor might want to take a closer look.

When the market is wrong about a stock, it gives savvy investors an opportunity. People often underestimate remarkable growth -- so investors can make money when fast growth is not fully appreciated. So this free report on the analyst consensus forecasts could help you make a master move on this stock.

You might be able to find a better buy than MKS Instruments. If you want a selection of possible winners, check out this free list of interesting companies that trade on a P/E below 20 (but have proven they can grow earnings).

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.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Thank you for reading.