It is a pleasure to report that the Vicor Corporation (NASDAQ:VICR) is up 62% in the last quarter. Meanwhile over the last three years the stock has dropped hard. Indeed, the share price is down a tragic 53% in the last three years. So it is really good to see an improvement. The rise has some hopeful, but turnarounds are often precarious.

While the last three years has been tough for Vicor shareholders, this past week has shown signs of promise. So let's look at the longer term fundamentals and see if they've been the driver of the negative returns.

To paraphrase Benjamin Graham: Over the short term the market is a voting machine, but over the long term it's a weighing machine. 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).

During the three years that the share price fell, Vicor's earnings per share (EPS) dropped by 58% each year. In comparison the 22% compound annual share price decline isn't as bad as the EPS drop-off. This suggests that the market retains some optimism around long term earnings stability, despite past EPS declines. This positive sentiment is also reflected in the generous P/E ratio of 563.30.

The image below shows how EPS has tracked over time (if you click on the image you can see greater detail).

It's probably worth noting that the CEO is paid less than the median at similar sized companies. But while CEO remuneration is always worth checking, the really important question is whether the company can grow earnings going forward. It might be well worthwhile taking a look at our free report on Vicor's earnings, revenue and cash flow.

A Different Perspective

We're pleased to report that Vicor shareholders have received a total shareholder return of 45% over one year. Since the one-year TSR is better than the five-year TSR (the latter coming in at 6% per year), it would seem that the stock's performance has improved in recent times. In the best case scenario, this may hint at some real business momentum, implying that now could be a great time to delve deeper. 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. For instance, we've identified 3 warning signs for Vicor that you should be aware of.

For those who like to find winning investments this free list of undervalued 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 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.