Goldman Sachs’ forecast that iron ore will tumble spurred a 1.9% slump Monday in Brazil’s Vale (VALE), the top iron ore producer. Meanwhile, Brazil’s Ibovespa index inched up 0.2%, trimming an early 1% pop on speculation that Brazilian mergers will increase amid lower valuations. Vale extended this year’s slide to 22% after Goldman Sachs said the raw material will fall below $50 a metric ton.