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The commodity that only pays in reais — when the gain was the currency (May 2013)

Episode

The extreme

The top line of the ranking said one thing; the bottom line said the opposite — and both measured the same basket of goods against the same index. The raw material seemed to have rediscovered command over the domestic market, but what was pushing it was not price. It was the currency in which the Brazilian investor reads their own result. In numbers: the Commodities (BRL)/IBOV ratio jumped from z −0.23 to +1.39, the largest intermarket move of the month; the equivalent pair in dollars did the opposite, sinking from −1.16 to −1.95. The difference had a name — the dollar at R$ 2.03. The Perene Risk Index zeroed out, from 37.6 to 0.0, in risk_off; the Selic at 8.0% a year.

What happened next

Three months on, in August 2013, the commodity actually returned to the top — this time through the dollar pair, from z 0.39 to 1.67, without the currency trick. But the backdrop was already different: the Selic had risen to 9.0% a year and the dollar had advanced to R$ 2.34. In November, the ratio in reais was still regaining ground (from −0.91 to −0.16), with the exchange rate firm at R$ 2.2954. And then, a year later, in May 2014, the story flipped: the commodity in reais lost its edge (z +0.65 to +0.07) and the dollar pair sank to the floor of the structure, anchored at z −2.12 — the asset most penalized against the index.

What did not happen

The raw material did not take command. What looked like strength in the product was, at its source, weakness in the currency — and, twelve months later, not even the currency push remained. Whoever read only the first line of the ranking, as the commodity's return to the stage, reached the opposite conclusion of whoever read the two lines together. The thermometer did not turn into a fever.

The honest verdict

The engine itself did not fool itself too much: it classified the May 2013 reading as insufficient. With the six-month horizon matured, the realized return was −3.1%, within the central band running from −2.9% to +0.4%, over only seven comparable episodes — too shallow a base to celebrate or to lament. The lesson that remained was methodological before it was about the market: when two ratios over the same asset diverge along the currency axis, read the exchange rate, not rotation.

Continue reading: Commodities in reais · The dollar as a regime thermometer · When the currency dictates the harvest →

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Characters: Dollar · Commodities