Investors had hoped for friendly overhauls such as spending cuts and deregulation Brazilian financial assets were swept by a historic rout Monday after the surprise election victory of President Luiz Inácio Lula da Silva wrong-footed investors who had bet on his defeat.The Brazilian real slid more than 10% against the U.S. dollar while the country’s benchmark stock index fell nearly 17%, which would mark a record daily loss. The index’s plunge triggered a circuit breaker, leading Brazil’s stock-exchange operator to temporarily halt trading.Global investors had piled into Brazilian markets in recent weeks after Flávio Bolsonaro—the eldest son of former President...