QuidelOrtho Corporation (NASDAQ:QDEL) shareholders will doubtless be very grateful to see the share price up 34% in the last quarter. But that doesn't change the fact that the returns over the last three years have been disappointing. Indeed, the share price is down a tragic 67% in the last three years. Some might say the recent bounce is to be expected after such a bad drop. The rise has some hopeful, but turnarounds are often precarious.

Now let's have a look at the company's fundamentals, and see if the long term shareholder return has matched the performance of the underlying business.

In his essay The Superinvestors of Graham-and-Doddsville Warren Buffett described how share prices do not always rationally reflect the value of a business. One way to examine how market sentiment has changed over time is to look at the interaction between a company's share price and its earnings per share (EPS).

QuidelOrtho saw its share price decline over the three years in which its EPS also dropped, falling to a loss. Since the company has fallen to a loss making position, it's hard to compare the change in EPS with the share price change. However, we can say we'd expect to see a falling share price in this scenario.

You can see below how EPS has changed over time (discover the exact values by clicking on the image).

Dive deeper into QuidelOrtho's key metrics by checking this interactive graph of QuidelOrtho's earnings, revenue and cash flow.

A Different Perspective

QuidelOrtho shareholders are down 36% for the year, but the market itself is up 35%. However, keep in mind that even the best stocks will sometimes underperform the market over a twelve month period. Unfortunately, last year's performance may indicate unresolved challenges, given that it was worse than the annualised loss of 4% over the last half decade. We realise that Baron Rothschild has said investors should "buy when there is blood on the streets", but we caution that investors should first be sure they are buying a high quality business. It's always interesting to track share price performance over the longer term. But to understand QuidelOrtho better, we need to consider many other factors. For instance, we've identified 1 warning sign for QuidelOrtho that you should be aware of.

If you would prefer to check out another company -- one with potentially superior financials -- then do not miss this free list of companies that have proven they can grow earnings.

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

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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.