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The banks' premium at two deviations — and the year-long descent

Episode

The extreme

There was a sector too expensive for comfort in the Brazilian structure, and the number did not hide it. Finance had climbed month after month until it broke away from the rest of the board: the Finance/IBOV ratio closed November 2010 at two and a quarter deviations above its historical average, the most distant point in the entire structure. It was the price of confidence in the form of a digit — banks rewarded precisely when current inflation was creeping back. In numbers: Finance/IBOV from a z of 1.58 to 2.21, with commodities coming back in (−0.29 to 0.60) and cyclicals giving back ground (1.18 to 0.31); the month's IPCA at 0.83% and the Selic parked at 10.75% per year.

What happened next

The most expensive position was the first to empty out. By February 2011, three months later, the Finance/IBOV ratio had already crossed into negative territory (−0.34), while the money ran toward the rent of real-estate funds (IFIX/IBOV from 0.73 to 1.73). In May, the retreat continued, to −0.67. And in November 2011, a round year after the peak, finance marked −1.20 of deviation — the largest retreat in the structure that month, with capital buying currency and defensive protection. From top to basement, the most expensive sector traveled more than three deviations in twelve months.

What did not happen

The collapse of the premium did not come from a crash. Aggregate appetite did not sink along with it: the Perene Risk Index, far from foundering, held firm — it reached 98.6 in May 2011 and 86.0 in November. Anyone reading the +2.21 as an immediate sell trigger would have gotten tangled up with the clock: the banks' premium did not evaporate the following month, it drained over an entire year. And the deflation was not generalized panic — it was selective rotation, from a credit-sensitive sector toward shelters that shield against the currency and the slowdown.

The honest verdict

The extreme got right what it was: the point most distant from the average marked the peak of the premium, not a floor from which to rise. But it marked the start of a slow process, not the flip of a switch. A stretched relative valuation says there is much to give back — never when the giving back begins.

Continue reading: The money flows back through the banks · The single bet on banks · The finance names leave the table →

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Characters: Statistical anomaly