Argentina nation-specific ETFs climbed Friday after e-commerce retailer MercadoLibre Inc rallied to a report high on a first-quarter revenue beat. Whereas most of its competitors have gone out of business, MercadoLibre continues to thrive. The company expanded to 9 countries in the Americas and Europe, and in 2002, eBay purchased a stake within the firm, making MercadoLibre its official partner in