Investors rarely like it when a large chunk of stock in one of their companies is sold for a relative bargain.Fintech stock DLocal (DLO -7.83%) wasn't a good place to park anyone's money on Thursday. On news of a large chunk of shares being sold by an institutional investor, the company's stock dived by nearly 8%. The benchmark S&P 500 index fared much better, closing the day almost 1% higher.Fifteen million is a large numberBefore market open, DLocal announced that one of its major shareholders is launchin ...