What happened

Shares of Moderna (MRNA -0.58%) jumped 8.6% on Monday after the biotechnology leader said it dosed the first participant in a new clinical trial for its experimental vaccine for human immunodeficiency virus (HIV).

So what 

The phase 1 study is designed to evaluate the vaccine's safety profile and ability to provoke an immune response in approximately 100 adults aged 18 to 55 years who are HIV negative. The National Institutes of Health (NIH) is helping to fund the trial.

Medical researchers working in a lab.

Image source: Getty Images.

HIV is the virus that causes acquired immunodeficiency syndrome (AIDS), which currently has no cure. There are roughly 38 million people who have HIV across the world.

"Developing a vaccine regimen that induces sustained protective levels of HIV neutralizing antibodies in humans has been difficult to achieve," Moderna president Stephen Hoge said in a press release." At Moderna, we believe that mRNA offers an opportunity to take a fresh approach to this challenge."

Now what

Investors have grappled with how to value Moderna's stock. Although the biotech's COVID-19 vaccine has been a boon for the company, analysts question whether booster shots will represent a sustained source of recurring revenue in the coming years. If not, Moderna's profits could plunge once coronavirus vaccination programs have run their course.

Moderna is reinvesting a large portion of the cash it earned from its COVID-19 drug into its research and development program. An HIV vaccine could become an important new revenue stream should it prove safe and effective. But even if it doesn't, Moderna has a host of other drugs targeting other diseases in development.

And with its stock price down sharply from its highs even after today's gains, investors arguably aren't paying much for the potential upside of Moderna's pipeline.