Oxford Instruments (LON:OXIG) shareholders notch a 4.2% CAGR over 5 years, yet earnings have been shrinking

The main point of investing for the long term is to make money. Better yet, you'd like to see the share price move up more than the market average. Unfortunately for shareholders, while the Oxford Instruments plc (LON:OXIG) share price is up 17% in the last five years, that's less than the market return. Unfortunately the share price is down 2.9% in the last year.

Since the stock has added UK£61m to its market cap in the past week alone, let's see if underlying performance has been driving long-term returns.

AI is about to change healthcare. These 20 stocks are working on everything from early diagnostics to drug discovery. The best part - they are all under $10bn in marketcap - there is still time to get in early.

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. By comparing earnings per share (EPS) and share price changes over time, we can get a feel for how investor attitudes to a company have morphed over time.

Oxford Instruments' earnings per share are down 4.0% per year, despite strong share price performance over five years.

Since EPS is down a bit, and the share price is up, it's probably that the market previously had some concerns about the company, but the reality has been better than feared. In the long term, though, it will be hard for the share price rises to continue without improving EPS.

The graphic below depicts how EPS has changed over time (unveil the exact values by clicking on the image).

It's good to see that there was some significant insider buying in the last three months. That's a positive. That said, we think earnings and revenue growth trends are even more important factors to consider. Dive deeper into the earnings by checking this interactive graph of Oxford Instruments' earnings, revenue and cash flow.

What About Dividends?

When looking at investment returns, it is important to consider the difference between total shareholder return (TSR) and share price return. Whereas the share price return only reflects the change in the share price, the TSR includes the value of dividends (assuming they were reinvested) and the benefit of any discounted capital raising or spin-off. Arguably, the TSR gives a more comprehensive picture of the return generated by a stock. As it happens, Oxford Instruments' TSR for the last 5 years was 23%, which exceeds the share price return mentioned earlier. And there's no prize for guessing that the dividend payments largely explain the divergence!

A Different Perspective

Investors in Oxford Instruments had a tough year, with a total loss of 1.8% (including dividends), against a market gain of about 17%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Longer term investors wouldn't be so upset, since they would have made 4%, each year, over five years. If the fundamental data continues to indicate long term sustainable growth, the current sell-off could be an opportunity worth considering. While it is well worth considering the different impacts that market conditions can have on the share price, there are other factors that are even more important. Consider risks, for instance. Every company has them, and we've spotted 2 warning signs for Oxford Instruments you should know about.

Oxford Instruments is not the only stock that insiders are buying. For those who like to find lesser know companies this free list of growing companies with recent insider purchasing, could be just the ticket.

Please note, the market returns quoted in this article reflect the market weighted average returns of stocks that currently trade on British exchanges.

Have feedback on this article? Concerned about the content? Get in touch with us directly. Alternatively, email editorial-team (at) simplywallst.com.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.