Why MannKind Corporation Shares Sank

Although we don't believe in timing the market or panicking over market movements, we do like to keep an eye on big changes -- just in case they're material to our investing thesis.

What: Shares of MannKind , a biopharmaceutical company focused on the development of therapies to treat diabetes and cancer, sank as much as 17% after announcing a tentative date for the review of its inhaled diabetes medication, Afrezza, for the treatment of hyperglycemia.

So what: According to MannKind, it announced today before the opening bell that the Endocrinologic and Metabolic Drugs Advisory Committee had tentatively scheduled a review of Afrezza on April 1. The target date for the Food and Drug Administration to complete its review of Afrezza is April 15.

Now what: Following yesterday's romp higher without news, it's only befitting that skittish investors hit the exits today. The big news, of course, beyond just MannKind's volatility of late is that we're soon going to know the fate of inhaled diabetes drug Afrezza, which demonstrated solid efficacy in clinical studies, but was sent back to the drawing board twice since 2011. The memory of these two complete response letter rejections could very well be what's sending the stock lower today. With a completely redesigned inhaler, as well as positive clinical data, MannKind is now hoping for a different outcome. As for me, I do believe the third time could be the charm for MannKind, but I still have concerns with regard to the launch and pricing of the drug (if approved) relative to the current standard of treatment: insulin injection. Either way, you should have April 1 now circled on your calendars!

MannKind has enormous potential -- but perhaps not as much as our top stock for 2014
There's a huge difference between a good stock, and a stock that can make you rich. The Motley Fool's chief investment officer has selected his No. 1 stock for 2014, and it's one of those stocks that could make you rich. You can find out which stock it is in the special free report: "The Motley Fool's Top Stock for 2014." Just click here to access the report and find out the name of this under-the-radar company.

The article Why MannKind Corporation Shares Sank originally appeared on Fool.com.

Fool contributor Sean Williams has no material interest in any companies mentioned in this article. You can follow him on CAPS under the screen name TMFUltraLong, track every pick he makes under the screen name TrackUltraLong, and check him out on Twitter, where he goes by the handle @TMFUltraLong.Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.

Copyright © 1995 - 2014 The Motley Fool, LLC. All rights reserved. The Motley Fool has a disclosure policy.

Read Full Story