Decades ago, PriceSmart (PSMT 2.59%) was spun out of Costco as a way of bringing the warehouse, membership and of stores to Latin and South America.  Over the past two years, PriceSmart shares have just about doubled.

That positive momentum continued last week.  In this video, Motley Fool contributor Brian Stoffel explains why shares were up, and what two things investors need to keep their eye on moving forward.