We can readily understand why investors are attracted to unprofitable companies. For example, although Amazon.com made losses for many years after listing, if you had bought and held the shares since 1999, you would have made a fortune. Nonetheless, only a fool would ignore the risk that a loss making company burns through its cash too quickly.

So, the natural question for Synairgen (LON:SNG) shareholders is whether they should be concerned by its rate of cash burn. For the purposes of this article, cash burn is the annual rate at which an unprofitable company spends cash to fund its growth; its negative free cash flow. The first step is to compare its cash burn with its cash reserves, to give us its 'cash runway'.

View our latest analysis for Synairgen

How Long Is Synairgen's Cash Runway?

You can calculate a company's cash runway by dividing the amount of cash it has by the rate at which it is spending that cash. When Synairgen last reported its balance sheet in December 2022, it had zero debt and cash worth UK£20m. Looking at the last year, the company burnt through UK£14m. So it had a cash runway of approximately 17 months from December 2022. While that cash runway isn't too concerning, sensible holders would be peering into the distance, and considering what happens if the company runs out of cash. Depicted below, you can see how its cash holdings have changed over time. debt-equity-history-analysis

How Is Synairgen's Cash Burn Changing Over Time?

Because Synairgen isn't currently generating revenue, we consider it an early-stage business. Nonetheless, we can still examine its cash burn trajectory as part of our assessment of its cash burn situation. The 65% reduction in its cash burn over the last twelve months may be good for protecting the balance sheet but it hardly points to imminent growth. While the past is always worth studying, it is the future that matters most of all. For that reason, it makes a lot of sense to take a look at our analyst forecasts for the company.

How Easily Can Synairgen Raise Cash?

While we're comforted by the recent reduction evident from our analysis of Synairgen's cash burn, it is still worth considering how easily the company could raise more funds, if it wanted to accelerate spending to drive growth. Generally speaking, a listed business can raise new cash through issuing shares or taking on debt. Commonly, a business will sell new shares in itself to raise cash and drive growth. By looking at a company's cash burn relative to its market capitalisation, we gain insight on how much shareholders would be diluted if the company needed to raise enough cash to cover another year's cash burn.

Synairgen's cash burn of UK£14m is about 86% of its UK£17m market capitalisation. That suggests the company may have some funding difficulties, and we'd be very wary of the stock.

How Risky Is Synairgen's Cash Burn Situation?

On this analysis of Synairgen's cash burn, we think its cash burn reduction was reassuring, while its cash burn relative to its market cap has us a bit worried. Looking at the factors mentioned in this short report, we do think that its cash burn is a bit risky, and it does make us slightly nervous about the stock. Separately, we looked at different risks affecting the company and spotted 5 warning signs for Synairgen (of which 3 make us uncomfortable!) you should know about.

Of course Synairgen may not be the best stock to buy. So you may wish to see this freecollection of companies boasting high return on equity, or this list of stocks that insiders are buying.

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.

Join A Paid User Research Session
You’ll receive a US$30 Amazon Gift card for 1 hour of your time while helping us build better investing tools for the individual investors like yourself. Sign up here