Stock Analysis

When Should You Buy Castle Biosciences, Inc. (NASDAQ:CSTL)?

While Castle Biosciences, Inc. (NASDAQ:CSTL) might not have the largest market cap around , it saw a double-digit share price rise of over 10% in the past couple of months on the NASDAQGM. The recent rally in share prices has nudged the company in the right direction, though it still falls short of its yearly peak. With many analysts covering the stock, we may expect any price-sensitive announcements have already been factored into the stock’s share price. However, what if the stock is still a bargain? Today we will analyse the most recent data on Castle Biosciences’s outlook and valuation to see if the opportunity still exists.

Our free stock report includes 1 warning sign investors should be aware of before investing in Castle Biosciences. Read for free now.
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What Is Castle Biosciences Worth?

Castle Biosciences appears to be expensive according to our price multiple model, which makes a comparison between the company's price-to-earnings ratio and the industry average. We’ve used the price-to-earnings ratio in this instance because there’s not enough visibility to forecast its cash flows. The stock’s ratio of 32.9x is currently well-above the industry average of 23.19x, meaning that it is trading at a more expensive price relative to its peers. If you like the stock, you may want to keep an eye out for a potential price decline in the future. Since Castle Biosciences’s share price is quite volatile, this could mean it can sink lower (or rise even further) in the future, giving us another chance to invest. This is based on its high beta, which is a good indicator for how much the stock moves relative to the rest of the market.

View our latest analysis for Castle Biosciences

What kind of growth will Castle Biosciences generate?

earnings-and-revenue-growth
NasdaqGM:CSTL Earnings and Revenue Growth April 16th 2025

Future outlook is an important aspect when you’re looking at buying a stock, especially if you are an investor looking for growth in your portfolio. Although value investors would argue that it’s the intrinsic value relative to the price that matter the most, a more compelling investment thesis would be high growth potential at a cheap price. However, with an extremely negative double-digit change in profit expected over the next couple of years, near-term growth is certainly not a driver of a buy decision. It seems like high uncertainty is on the cards for Castle Biosciences, at least in the near future.

What This Means For You

Are you a shareholder? If you believe CSTL should trade below its current price, selling high and buying it back up again when its price falls towards the industry PE ratio can be profitable. Given the uncertainty from negative growth in the future, this could be the right time to reduce your total portfolio risk. But before you make this decision, take a look at whether its fundamentals have changed.

Are you a potential investor? If you’ve been keeping an eye on CSTL for a while, now may not be the best time to enter into the stock. Its price has risen beyond its industry peers, on top of a negative future outlook. However, there are also other important factors which we haven’t considered today, such as the track record of its management. Should the price fall in the future, will you be well-informed enough to buy?

Keep in mind, when it comes to analysing a stock it's worth noting the risks involved. In terms of investment risks, we've identified 1 warning sign with Castle Biosciences, and understanding it should be part of your investment process.

If you are no longer interested in Castle Biosciences, you can use our free platform to see our list of over 50 other stocks with a high growth potential.

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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.

About NasdaqGM:CSTL

Castle Biosciences

A molecular diagnostics company, provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett’s esophagus (BE), uveal melanoma, and mental health conditions.

Flawless balance sheet and slightly overvalued.

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