Some SIGA Technologies, Inc. (NASDAQ:SIGA) shareholders are probably rather concerned to see the share price fall 65% over the last three months. Looking further back, the stock has generated good profits over five years. Its return of 77% has certainly bested the market return!

While the stock has fallen 8.4% this week, it's worth focusing on the longer term and seeing if the stocks historical returns have been driven by the underlying fundamentals.

See our latest analysis for SIGA Technologies

While markets are a powerful pricing mechanism, share prices reflect investor sentiment, not just underlying business performance. One flawed but reasonable way to assess how sentiment around a company has changed is to compare the earnings per share (EPS) with the share price.

During the five years of share price growth, SIGA Technologies moved from a loss to profitability. That would generally be considered a positive, so we'd expect the share price to be up.

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. Before buying or selling a stock, we always recommend a close examination of historic growth trends, available here..

What About The Total Shareholder Return (TSR)?

Investors should note that there's a difference between SIGA Technologies' total shareholder return (TSR) and its share price change, which we've covered above. The TSR is a return calculation that accounts for the value of cash dividends (assuming that any dividend received was reinvested) and the calculated value of any discounted capital raisings and spin-offs. We note that SIGA Technologies' TSR, at 88% is higher than its share price return of 77%. When you consider it hasn't been paying a dividend, this data suggests shareholders have benefitted from a spin-off, or had the opportunity to acquire attractively priced shares in a discounted capital raising.

A Different Perspective

It's good to see that SIGA Technologies has rewarded shareholders with a total shareholder return of 19% in the last twelve months. Since the one-year TSR is better than the five-year TSR (the latter coming in at 13% per year), it would seem that the stock's performance has improved in recent times. Given the share price momentum remains strong, it might be worth taking a closer look at the stock, lest you miss an opportunity. I find it very interesting to look at share price over the long term as a proxy for business performance. But to truly gain insight, we need to consider other information, too. For example, we've discovered 1 warning sign for SIGA Technologies that you should be aware of before investing here.

For those who like to find winning investments 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 US 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.