According to CoinMeta, due to the weakness of the Brazilian real, Arabica coffee ( KCU26 ) fell by 11.70 cents (-3.45%) today in September, while Robusta coffee ( RMU26 ) fell by 88 cents (-2.27%) in September. Coffee prices tumbled significantly today as the weakness of the Brazilian real led to the closing of long positions in coffee futures. The real has dropped to a 2.5-week low against the US dollar.