Brazilian stocks seesaw after string of wins By: MarketWatch September 17, 2012 at 15:10 PM EDT Brazilian stocks seesaw Monday, putting the market at risk of ending its longest string of wins in eight months. Read More >> Related Stocks: Amazon.com America Movil S.A.B. DE C.V. ADR Petrobras - Petroleo Brasileiro S.A. Vale ADR Representing One Ord Shs