Just because a business does not make any money, does not mean that the stock will go down. For example, biotech and mining exploration companies often lose money for years before finding success with a new treatment or mineral discovery. But while history lauds those rare successes, those that fail are often forgotten; who remembers Pets.com?

So, the natural question for Rex Minerals (ASX:RXM) shareholders is whether they should be concerned by its rate of cash burn. In this report, we will consider the company's annual negative free cash flow, henceforth referring to it as the 'cash burn'. First, we'll determine its cash runway by comparing its cash burn with its cash reserves.

Check out our latest analysis for Rex Minerals

When Might Rex Minerals Run Out Of Money?

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. In December 2021, Rex Minerals had AU$53m in cash, and was debt-free. Importantly, its cash burn was AU$7.4m over the trailing twelve months. Therefore, from December 2021 it had 7.1 years of cash runway. While this is only one measure of its cash burn situation, it certainly gives us the impression that holders have nothing to worry about. Depicted below, you can see how its cash holdings have changed over time.

How Is Rex Minerals' Cash Burn Changing Over Time?

Rex Minerals didn't record any revenue over the last year, indicating that it's an early stage company still developing its business. So while we can't look to sales to understand growth, we can look at how the cash burn is changing to understand how expenditure is trending over time. With the cash burn rate up 21% 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. Rex Minerals makes us a little nervous due to its lack of substantial operating revenue. We prefer most of the stocks on this list of stocks that analysts expect to grow.

How Easily Can Rex Minerals Raise Cash?

Given its cash burn trajectory, Rex Minerals shareholders may wish to consider how easily it could raise more cash, despite its solid cash runway. Issuing new shares, or taking on debt, are the most common ways for a listed company to raise more money for its business. One of the main advantages held by publicly listed companies is that they can sell shares to investors to raise cash and fund 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.