Visa's investment in Square represents about 1 percent stake

Visa Inc , the world's largest credit and debit card company, said on Friday it currently has about a 1 percent stake in mobile payments company Square Inc based on a 2011 investment. Visa told Reuters its current holdings are just more than 4.19 million shares of Class B common stock. The company has the option to convert up to 3.52 million of these shares into Class A stock, according to a disclosure filed with the Securities and Exchange Commission on Thursday, which would give it at most a 9