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The silent adversary — August 2025, when fixed income won without attacking

Episode

The extreme

The stock market was celebrating. Mood had returned to extreme optimism in a single leap, as if July's truce had never happened. But beneath the festive surface, an entire sector was being demolished in silence — and the culprit never landed a single blow. It was fixed income, paying close to 15% a year to do nothing. In numbers: market mood jumped from 39.0 to 72.3, while the IFIX/IBOV ratio plunged from z −0.42 to −2.12 — nearly two deviations in four weeks, the most violent move across the entire intermarket grid. Selic at 15.0% a year, the dollar at R$ 5.45.

What happened next

The demolition did not stop at the close. Three months later, in November 2025, real estate funds were still on the floor — IFIX/IBOV at z −2.36, an even deeper trough — while the stock market's mood, stubborn, returned once more to extreme optimism (72.0). The brick would only start to breathe in February 2026, when the ratio climbed from a floor near z −2.76 in January to −2.20. They were months of the same plot: the asset whose appeal is yield losing, month after month, to the yield that needs no property at all.

What did not happen

What the defensive reading failed to see was the whole index. The structure was screaming caution — intermarket in moderate risk-off, the domestic regime defensive at 39.0 — and yet anyone who bought the Ibovespa in August reaped 27.9% over six months, above the 90th percentile of comparable cases (17.4%). The engine classified that month as a Surprise: the outcome fell outside the 80% band. Caution got the brick right and got the breadth wrong. And the Selic, that silent adversary, never retreated — the market rose all the same.

The honest verdict

August's reading was right about the detail and blind to the whole. Real estate funds did indeed lose to fixed income, methodically, month after month. But treating the defensive structure as a ceiling on the index would have cost dearly: the Ibovespa ignored the warning and surged. The basement can give way while the roof climbs — and both can be right at the same time.

Continue reading: The brick against the paper · The Selic at 15% and the euphoria that yields · The premium of refuge — utilities against the Ibovespa →

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Characters: Structure (intermarket) · Flow (risk appetite) · Mood · Dollar · Rates (Selic)