Brazil’s first-round result has a direct rates transmission. Flávio Bolsonaro’s 47.03 percent to Lula’s 45.16 percent — and a runoff on October 25 that polls as a dead heat — lands on a Copom that has cut the Selic in five straight meetings to 13.75 percent. Easing into a polarized transition with fiscal stress on the table is a harder call than easing into continuity.
The fiscal variable is the swing: Lula has publicly promised a debt ceiling if reelected, while a Bolsonaro government arrives with a right-wing congressional majority — particularly in the Senate — that changes the budget arithmetic. Either way, the market prices a transition, and transitions price term premium.
The external lever is Washington. The U.S. tariff architecture on Brazil — 10 percent baseline, 50 percent effective on many goods, a 10 percent steel deal — hangs on the winner, and any U.S. interference posture toward the result (already a reported concern) feeds directly into BRL and Brazilian rates. Copom next meets in early November, after the runoff: the margin on October 25 sets its room to maneuver.