
Over the past six months, Regeneron has been a great trade, beating the S&P 500 by 32.3%. Its stock price has climbed to $767, representing a healthy 35.8% increase. This was partly due to its solid quarterly results, and the run-up might have investors contemplating their next move.
Is there a buying opportunity in Regeneron, or does it present a risk to your portfolio? Get the full breakdown from our expert analysts, it’s free.
Why Is Regeneron Not Exciting?
We’re happy investors have made money, but we're sitting this one out for now. Here are three reasons there are better opportunities than REGN and a stock we'd rather own.
1. Lackluster Revenue Growth
We at StockStory place the most emphasis on long-term growth, but within healthcare, a stretched historical view may miss recent innovations or disruptive industry trends. Regeneron’s recent performance shows its demand has slowed as its annualized revenue growth of 4.6% over the last two years was below its five-year trend. We’re wary when companies in the sector see decelerations in revenue growth, as it could signal changing consumer tastes aided by low switching costs. 
2. Shrinking Adjusted Operating Margin
Adjusted operating margin is one of the best measures of profitability because it tells us how much money a company takes home after subtracting all core expenses, like marketing and R&D. It also removes various one-time costs to paint a better picture of normalized profits.
Looking at the trend in its profitability, Regeneron’s adjusted operating margin decreased by 26.8 percentage points over the last five years. This raises questions about the company’s expense base because its revenue growth should have given it leverage on its fixed costs, resulting in better economies of scale and profitability. Its adjusted operating margin for the trailing 12 months was 34.1%.

3. New Investments Fail to Bear Fruit as ROIC Declines
A company’s ROIC, or return on invested capital, shows how much operating profit it makes compared to the money it has raised (debt and equity).
We like to invest in businesses with high returns, but the trend in a company’s ROIC is what often surprises the market and moves the stock price. Unfortunately, Regeneron’s ROIC has decreased significantly over the last few years. We like what management has done in the past, but its declining returns are perhaps a symptom of fewer profitable growth opportunities.

Final Judgment
Regeneron isn’t a terrible business, but it doesn’t pass our quality test. With its shares topping the market in recent months, the stock trades at 17.3× forward P/E (or $767 per share). This valuation is reasonable, but the company’s shakier fundamentals present too much downside risk. We're fairly confident there are better investments elsewhere. Let us point you toward the Amazon and PayPal of Latin America.
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