Japan and Januvia. No, it's not a country—not even a fictional one—even though it sounds like "Genovia" in "The Princess Diaries." It's a diabetes drug from Merck. And today it won a competitive reprieve from Japan's Takeda Pharmaceuticals.

In Friday morning trading, shares of Dow component MRK seem to be getting a lift from the news. Januvia is an important new product for Merck. Last year, the company sold $1.75 billion worth of Januvia and a similar combo pill, Janumet. This year it expects that number to go up at least a billion bucks and to maybe nearly double.