As Brazil's political turmoil continues, volatility in the Brazilian real is the highest among 16 major currencies.

How the strengthening of the real is being driven by the increasing likelihood that Brazilian president Dilma Rousseff will be removed from office.

How the strengthening of the real is being driven by the increasing likelihood that Brazilian president Dilma Rousseff will be removed from office.

Standard & Poor's move reflects budget strain, faltering economy.

Standard & Poor's move reflects budget strain, faltering economy.

Falling real reflects the country's weakening economic outlook.