Decades ago, PriceSmart (NASDAQ:PSMT) 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.

Fool contributor Brian Stoffel owns shares of PriceSmart. The Motley Fool recommends Costco Wholesale and PriceSmart. The Motley Fool owns shares of Costco Wholesale. Try any of our Foolish newsletter services free for 30 days. We Fools may not all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.