Flávio Bolsonaro leads trader expectations for second place in Brazil’s October 4 first-round presidential vote because recent national polls show him consistently trailing incumbent Luiz Inácio Lula da Silva by narrow margins while far ahead of every other contender. Jair Bolsonaro’s December endorsement consolidated Liberal Party and conservative support behind his son, narrowing the field on the right and limiting vote fragmentation among candidates such as Romeu Zema and Ronaldo Caiado. Lula’s modest first-round leads of 38–40 percent in May surveys leave limited room for any other name to finish ahead of Flávio, whose share hovers near 33–37 percent. A late-May scandal involving leaked recordings has introduced short-term uncertainty but has not altered the broader pattern of a polarized contest where the two frontrunners dominate the top two spots.