Oncoclinicas Do Brasil Servicos Medicos (SA:ONCO3 R$13.0), Brazil's 4th largest Health Care company by market cap, has soared R$2.73 (or 26.6%) in the past month to close at R$13.0 on Thursday December 28. Compared with the Bovespa Index which rose 7,645.9 points (or 6.0%) in the month, this represented a relative price increase of 20.5%.