https://www.fool.com/investing/2019/04/18/heres-why-stoneco-…
"In this case, the plunge appears to be triggered by a move from a rival company. Itau Unibanco Holding SA (NYSE:ITUB), a large Brazilian bank, said that it will begin to advance credit card payments to small and medium-sized merchants.
Itau’s card-processing unit, Rede, will pay merchants in just two days, much faster than the 30-day industry standard. This could certainly put pressure on other payment processors in the Brazilian market, including StoneCo."
-AJ