 Risk appetite rises on coronavirus treatment hopes Brazil central bank delivers expected rate cut Chilean peso firms as copper jumps to one-week high New throughout, updates prices, market activity and comments By Sruthi Shankar Feb 5 Reuters - Latin American currencies and stocks rose on Wednesday for a third session, as appetite grew for riskier assets on reports of progress on the battle against Chinas coronavirus, and as Brazils central bank lowered its benchmark interest rate. A Chinese university team said it found a drug to treat people infected with the virus while UK researchers claimed a significant breakthrough in the search for a vaccine. 