To be fair, country music's popularity has been on a steady incline for more than 20 years, Billboard country chart manager Wade Jessen says.

CNN: Obsessions: Crazy about country music

Mr. SILVIO PIETROLUONGO (Chart Manager, Billboard Magazine): Back when 45 singles were the mode of purchasing choice, record labels really released one song physically, you know, every few months.

NPR: On Billboard Chart, No Longer Lonely At Top

If you were to chart this fund, you would see a very nice upward steady upward trajectory because of the different approach that each manager has to the market, the flexibility that each has.

FORBES: What Is a "Flexible" Bond Fund?