B3 S.A. - Brasil, Bolsa, Balcão (BOVESPA:B3SA3) plans to buy a share of Bolsas y Mercados Argentinos S.A. (BASE:BYMA), its Chief Executive Officer said, in the company's latest push across Latin America after taking minority ownership in exchanges from Mexico to Chile in recent years. B3 is interested in a “small stake” in Bolsas y Mercados Argentinos SA, said Gilson Finkelsztain, B3's Chief Executive Officer, said in an interview in Shanghai last Thursday.