Investors in Square Inc (NYSE: SQ) have had good reason to celebrate this year. Shares in the payment processing company are up more than 70% year-to-date. The company’s meteoric rise has been powered by its strong revenue and earnings growth reported in recent quarters. In Square’s 2017 first quarter, the company reported adjusted revenue of $204 million, a 39% increase year-over-year, and total payment volume of $13.6 billion, a 33% annual increase.