Just because a business does not make any money, does not mean that the stock will go down. For example, although software-as-a-service business Salesforce.com lost money for years while it grew recurring revenue, if you held shares since 2005, you'd have done very well indeed. But while history lauds those rare successes, those that fail are often forgotten; who remembers Pets.com?

So should Pensana Metals (ASX:PM8) shareholders be worried about its 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. First, we'll determine its cash runway by comparing its cash burn with its cash reserves.

Check out our latest analysis for Pensana Metals

When Might Pensana Metals Run Out Of Money?

A company's cash runway is calculated by dividing its cash hoard by its cash burn. In June 2019, Pensana Metals had AU$4.7m in cash, and was debt-free. In the last year, its cash burn was AU$5.0m. That means it had a cash runway of around 11 months as of June 2019. That's quite a short cash runway, indicating the company must either reduce its annual cash burn or replenish its cash. The image below shows how its cash balance has been changing over the last few years.

How Is Pensana Metals's Cash Burn Changing Over Time?

Because Pensana Metals 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. With the cash burn rate up 45% in the last year, it seems that the company is ratcheting up investment in the business over time. However, the company's true cash runway will therefore be shorter than suggested above, if spending continues to increase. Admittedly, we're a bit cautious of Pensana Metals due to its lack of significant operating revenues. So we'd generally prefer stocks from this list of stocks that have analysts forecasting growth.

Can Pensana Metals Raise More Cash Easily?

Given its cash burn trajectory, Pensana Metals shareholders should already be thinking about how easy it might be for it to raise further cash in the future. Issuing new shares, or taking on debt, are the most common ways for a listed company to raise more money for its business. Commonly, a business will sell new shares in itself to raise cash to drive growth. We can compare a company's cash burn to its market capitalisation to get a sense for how many new shares a company would have to issue to fund one year's operations.

Pensana Metals has a market capitalisation of AU$26m and burnt through AU$5.0m last year, which is 19% of the company's market value. As a result, we'd venture that the company could raise more cash for growth without much trouble, albeit at the cost of some dilution.

Is Pensana Metals's Cash Burn A Worry?

On this analysis of Pensana Metals's cash burn, we think its cash burn relative to its market cap was reassuring, while its increasing cash burn 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. When you don't have traditional metrics like earnings per share and free cash flow to value a company, many are extra motivated to consider qualitative factors such as whether insiders are buying or selling shares. Please Note: Pensana Metals insiders have been trading shares, according to our data. Click here to check whether insiders have been buying or selling.

Of course, you might find a fantastic investment by looking elsewhere. So take a peek at this free list of companies insiders are buying, and this list of stocks growth stocks (according to analyst forecasts)

If you spot an error that warrants correction, please contact the editor at editorial-team@simplywallst.com. This article by Simply Wall St is general in nature. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. Simply Wall St has no position in the stocks mentioned.

We aim to bring you long-term focused research analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Thank you for reading.