
Brazil's central bank intervened on August 30, 2018, with US$1.5 billion in support after the real weakened to 4.21 per US dollar, and the currency closed at 4.14. The bank also said it would intervene with US$2.15 billion on Friday to roll over short-term debt.
The move came amid Argentina's currency crisis, Turkish lira weakness and uncertainty ahead of Brazil's October presidential election.
Heavier central bank intervention and emerging-market contagion can keep the real volatile, which affects the cost of Brazilian soy, corn and meal in dollar terms. A stronger real would tend to firm Brazilian export offers, while continued weakness supports Brazilian farmer selling.
After 213 past bearish macro events, Brazilian Real (BRL per USD) moved a median -0.2% over 5 sessions (46% higher; middle half -1.5% to +0.9%), and +0.2% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.