Shares of MercadoLibre Inc. rallied after the Latin American e-commerce and fintech giant’s profit far surpassed estimates.Net income in the fourth quarter was a record $639 million compared with a $406 million median estimate from analysts, according to data compiled by Bloomberg. The $6.1 billion of revenue in the quarter also beat expectations. The stock jumped as much as 12.5% at the open of trading in New York....