Brazil's wealthiest banker lost approximately $9 billion on Monday after an unexpected left-wing election victory triggered a market rout, with the market turmoil forcing a temporary trading halt on the stock exchange in early trading. According to the Bloomberg Billionaires Index, the 10 Brazilians among the world's top 500 wealthiest individuals collectively lost $14 billion, the largest single-day drop since the index's inception in 2012. André Esteves, founder of Banco BTG Pactual SA, saw his assets shrink by $3.7 billion, representing about 24% of his current $12 billion fortune.