Is Starbucks Silently Killing Your Portfolio?

Investors have been thrilled with Starbucks (NASDAQ: SBUX) over the past 10 years -- a period that has seen its shares gain 350% versus about 200% for the S&P 500. Starbucks recently announced a record quarterly revenue of $8.2 billion, but there's more than meets the eye. The company has made a big bet on China over the years, growing its store count to 5,761 locations, or about 16.5% of its total portfolio.