Why is Itau Unibanco Banco stock plunging today?

Itau Unibanco Banco Holding SA ADR stock plummeted 26.6% during pre-open trading on Monday, reaching a price of $7.10 after Brazilian President Luiz Inácio Lula da Silva achieved a surprising victory in the presidential runoff. The results marked a dramatic reversal of the market-friendly political narrative that had been pushing Brazilian assets higher for weeks, as Lula defeated right-wing senator Flávio Bolsonaro by a margin of approximately 51.8% to 48.2%.

Investors had anticipated Bolsonaro's potential fiscal austerity measures, which could have led to interest rate cuts. However, concerns arose that Lula might be less inclined to implement the necessary austerity measures to strengthen Brazil's public finances. Goldman Sachs analysts predict only modest spending growth containment under Lula, with further tax hikes and minimal structural reforms.

The election result also raised concerns about prolonged political instability, as Bolsonaro demanded the result be annulled, claiming the Supreme Court altered the rules by extending voting hours. This political uncertainty, combined with the unwinding of weeks of election-driven gains, fears over Brazil's fiscal trajectory under Lula, and the collapsing Brazilian real, led to one of the most significant single-session declines for ITUB's ADR in recent memory, pushing its price back toward the lower end of its 52-week range near $6.82.

The confluence of all these factors contributed to the sharp decline in Itau Unibanco Banco Holding SA ADR stock.