Radar Perene / Archive / episode

The only voice afraid — the dollar above R$ 4,10 in September 2018

◦ Written under index methodology v1 (in effect until 15 Jul 2026). The current series is v2 — readings quoted here may differ from those shown today. See the methodology.

Episode

The extreme

Reconciliation sounds like a chorus — and almost always one voice off-key. For months, the Radar had logged the same domestic disagreement: capital was moving while mood refused to climb aboard. September 2018 closed the gap, and it closed upward. For the first time in the recent archive, sentiment and composition told the same story — that of a reshuffle. In numbers: the Ânima Index leapt from 11,5 to 54,6, its first close above neutrality; the Cyclical/Non-Cyclical ratio advanced from neutrality to well above its own average, the largest structural move of the month; the Perene Risk Index rose from 39,7 to 44,8. Against that chorus, a single instrument dissented: the dollar closed at R$ 4,1165, the first reading above R$ 4,10 in the archive. The currency carried an election-eve tension that equities still refused to price.

What happened next

The chorus got the destination right, not the path. Three months later, in December 2018, the structure fractured: the intermarket reading collapsed from 69,59 to 3,41 — risk off in its firmest form — while capital stayed pinned to the ceiling, 100,0. Two clocks on the same wall, different hours. The currency, for its part, retreated to R$ 3,8851, below September's R$ 4,11. At six months came the archive's verdict: the optimistic reading matured with a 22,0% return, inside the archive's central band — half of the comparable episodes returned between 11,1% and 26,2% — and classified as a hit. A year later, in September 2019, the mismatch flipped sign — mood was rising (Ânima from 16,3 to 42,0) while capital left the room (Perene Risk from 47,6 to 20,6), with the dollar once again above R$ 4,10.

What did not happen

The dissenting voice did not win — at least not within the horizon that mattered. The dollar above R$ 4,10 did not sink the following six months: stocks delivered their 22%, and the fear embedded in the currency eased to R$ 3,88 by December. Nor did September's reconciliation hold. It did not turn into euphoria — 54,6 was a tepid mood, more absence of fear than conviction — and it did not last. Within a year, sentiment and capital were at odds again, now with the roles reversed.

The honest verdict

The dollar was the only instrument afraid that month, and for six months it was wrong: stocks rose. But being wrong for six months is not being wrong. The currency sensed the turbulence the rest of the board would only meet in December. A dissonant note is not a false note — it is usually just early.

Continue reading: The two clocks after the 2018 election · The dollar as a regime thermometer · The exchange rate that ran 2024 →

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Characters: Dollar