Diabetes is no longer solely an American epidemic.

The Journal of the American Medical Association just released a study that shows 11.6% of Chinese adults have the debilitating disease, surpassing America's 11.3%. With a population topping 1 billion, China is now home to more than 100 million people suffering from diabetes -- a third of the global diabetes population.

And with emerging markets gaining more access to middle-class amenities such as high-fat food, the trend is accelerating. The International Diabetes Federation projects that more than 550 million people will be diagnosed with diabetes by 2030, up from 371 million diabetes patients in 2012. That's a huge opportunity for the global leader in diabetes medication and treatments.

Not only is this market leader home to five of the top 10 selling diabetes medications in the world, it's also developing a deep pipeline of next-generation diabetes drugs and is protected by a huge competitive moat. That has driven an outsize gain of 58% in the past two years: