MannKind (STU:NNFN) Defensive Interval Ratio

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
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Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

STU:NNFN MannKind Corp STU:NNFN
71 GF Score
Price €3.73
GF Value €6.46
Valuation Possible Value Trap
! 8 Warning Signs
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What is MannKind Defensive Interval Ratio?

STU:NNFN
71GF Score
MannKind Corp STU:NNFN
Defensive Interval Ratio is just one metric. See GF Score™, valuation, warning signs, and more.
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Is MannKind (STU:NNFN) Overvalued in 2026?

Based on GuruFocus' analysis, MannKind stock appears to be undervalued. The current stock price of €3.73 is trading 42.2% below its estimated GF Value™ of €6.46. GuruFocus considers MannKind to be Possible Value Trap.

Key valuation signals for STU:NNFN:

  • Defensive Interval Ratio:
  • GF Value™: €6.46 vs. price of €3.73 (42.2% below fair value)
  • GF Score™: 71/100 with 8 warning signs

No single metric tells the full story. See the STU:NNFN stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.


MannKind Business Description

Other Exchanges MNKD:USA
Address 1 Casper Street, Danbury, CT, USA, 06810
MannKind Corp is a biopharmaceutical company focused on the development and commercialization of patient-centric therapies that address serious unmet medical needs for those living with cardiometabolic and orphan lung diseases. The Company is currently commercializing three products: Afrezza (insulin human) Inhalation Powder, an ultra rapid-acting inhaled insulin indicated to improve glycemic control in adults with diabetes; Furoscix (furosemide injection), to treat fluid buildup in patients with chronic heart failure or chronic kidney disease; and the V-Go wearable insulin delivery device, which provides continuous subcutaneous infusion of insulin in adults that require insulin.
71GF Score

Get the complete analysis for STU:NNFN

Defensive Interval Ratio is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€3.73
Price
€6.46
GF Value