A first-round outright win needs a candidate above 50% of valid votes, and no poll has anyone close. Late-September surveys put Lula around 40% and Flávio Bolsonaro in the mid-30s in first-round scenarios, with the rest of the field scattered in single digits. The 7% here is essentially the probability that polling is catastrophically wrong in one direction, and Brazilian pollsters have underestimated the right before, notably in 2022. Even a strong Lula surge runs into a fragmented right that still pulls double-digit combined support. The honest read is that a runoff on October 25 is the overwhelming base case and this line is priced for tail risk.
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