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. Nonetheless, only a fool would ignore the risk that a loss making company burns through its cash too quickly.

Given this risk, we thought we'd take a look at whether Keros Therapeutics (NASDAQ:KROS) shareholders should be worried about its cash burn. In this article, we define cash burn as its annual (negative) free cash flow, which is the amount of money a company spends each year to fund its growth. Let's start with an examination of the business' cash, relative to its cash burn.

When Might Keros Therapeutics Run Out Of Money?

A cash runway is defined as the length of time it would take a company to run out of money if it kept spending at its current rate of cash burn. When Keros Therapeutics last reported its September 2024 balance sheet in November 2024, it had zero debt and cash worth US$531m. Looking at the last year, the company burnt through US$143m. That means it had a cash runway of about 3.7 years as of September 2024. A runway of this length affords the company the time and space it needs to develop the business. You can see how its cash balance has changed over time in the image below.

How Is Keros Therapeutics' Cash Burn Changing Over Time?

Whilst it's great to see that Keros Therapeutics has already begun generating revenue from operations, last year it only produced US$651k, so we don't think it is generating significant revenue, at this point. As a result, we think it's a bit early to focus on the revenue growth, so we'll limit ourselves to looking at how the cash burn is changing over time. With the cash burn rate up 16% 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. 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 Keros Therapeutics Raise Cash?

Given its cash burn trajectory, Keros Therapeutics 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 comparing a company's annual cash burn to its total market capitalisation, we can estimate roughly how many shares it would have to issue in order to run the company for another year (at the same burn rate).

Since it has a market capitalisation of US$2.3b, Keros Therapeutics' US$143m in cash burn equates to about 6.2% of its market value. Given that is a rather small percentage, it would probably be really easy for the company to fund another year's growth by issuing some new shares to investors, or even by taking out a loan.

So, Should We Worry About Keros Therapeutics' Cash Burn?

As you can probably tell by now, we're not too worried about Keros Therapeutics' cash burn. In particular, we think its cash runway stands out as evidence that the company is well on top of its spending. While its increasing cash burn wasn't great, the other factors mentioned in this article more than make up for weakness on that measure. After taking into account the various metrics mentioned in this report, we're pretty comfortable with how the company is spending its cash, as it seems on track to meet its needs over the medium term. On another note, Keros Therapeutics has 4 warning signs (and 2 which are concerning) we think you should know about.

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

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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.