UPDATE 1-Brazil digital bank Inter beats Q2 profit estimates on solid growth

Brazilian digital bank Inter & Co said on Monday its second-quarter net profit more than quadrupled from the previous year, beating analysts' expectations as the firm's revenue and net interest margin expanded. Nasdaq-listed Inter posted a net profit of 64 million reais ($13.05 million), more than double the 30.3 million reais expected by analysts polled by Refinitiv. Chief Financial Officer Santiago Stel dubbed the results the company's "best quarter ever" in an interview, with the bank's efficiency ratio, which measures the ratio of expenses to revenue, improving steadily.