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# Should You Be Tempted To Sell National Instruments Corporation (NASDAQ:NATI) Because Of Its P/E Ratio?

The goal of this article is to teach you how to use price to earnings ratios (P/E ratios). We'll show how you can use National Instruments Corporation's (NASDAQ:NATI) P/E ratio to inform your assessment of the investment opportunity. Looking at earnings over the last twelve months, National Instruments has a P/E ratio of 35.52. That corresponds to an earnings yield of approximately 2.8%.

View our latest analysis for National Instruments

### How Do You Calculate A P/E Ratio?

The formula for P/E is:

Price to Earnings Ratio = Price per Share Ã· Earnings per Share (EPS)

Or for National Instruments:

P/E of 35.52 = \$40.71 Ã· \$1.15 (Based on the trailing twelve months to June 2019.)

### Is A High P/E Ratio Good?

A higher P/E ratio implies that investors pay a higher price for the earning power of the business. All else being equal, it's better to pay a low price -- but as Warren Buffett said, 'It's far better to buy a wonderful company at a fair price than a fair company at a wonderful price.

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

One good way to get a quick read on what market participants expect of a company is to look at its P/E ratio. As you can see below, National Instruments has a higher P/E than the average company (19.0) in the electronic industry.

Its relatively high P/E ratio indicates that National Instruments shareholders think it will perform better than other companies in its industry classification. Clearly the market expects growth, but it isn't guaranteed. So further research is always essential. I often monitor director buying and selling.

### How Growth Rates Impact P/E Ratios

Generally speaking the rate of earnings growth has a profound impact on a company's P/E multiple. When earnings grow, the 'E' increases, over time. 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.

National Instruments's 133% EPS improvement over the last year was like bamboo growth after rain; rapid and impressive. Even better, EPS is up 20% per year over three years. So we'd absolutely expect it to have a relatively high P/E ratio.

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

Don't forget that the P/E ratio considers market capitalization. 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 spending might be good or bad, overall, but the key point here is that you need to look at debt to understand the P/E ratio in context.

### So What Does National Instruments's Balance Sheet Tell Us?

The extra options and safety that comes with National Instruments's US\$440m net cash position means that it deserves a higher P/E than it would if it had a lot of net debt.

### The Verdict On National Instruments's P/E Ratio

National Instruments has a P/E of 35.5. That's higher than the average in its market, which is 17.5. The excess cash it carries is the gravy on top its fast EPS growth. To us, this is the sort of company that we would expect to carry an above average price tag (relative to earnings).

When the market is wrong about a stock, it gives savvy investors an opportunity. As value investor Benjamin Graham famously said, 'In the short run, the market is a voting machine but in the long run, it is a weighing machine. 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 National 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).

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.

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. Thank you for reading.