SABESP Options Signal Calm Ahead of Wednesday Print

SBS heads into its Wednesday earnings release with options traders striking a notably bullish tone — even as the stock drifts lower and short sellers quietly rebuild positions.

The clearest pre-earnings signal is in options. The put/call ratio has fallen to 0.22, below its 20-day average of 0.26 and near the lower end of its 52-week range. That skew toward calls reflects net optimism — or at minimum, limited demand for downside protection — at a moment when the stock has lost 7% over the past month to close at $5.31. The contrast is striking: price action looks soft, but options positioning does not.

Short interest tells a more cautious story, though not an alarming one. Shares short rose nearly 9% week-on-week to roughly 14.8 million as of August 6, recovering from a sharp 32% drop over the prior month. The borrow market itself remains easy: cost to borrow is just under 1.2%, and availability is running at 74% — loose by any measure. That combination suggests the recent short interest tick-up reflects tactical positioning rather than a crowded directional bet against the company.

The debate around SABESP pivots on two structural tensions. Bulls point to the valuation: a PE near 11x and EV/EBITDA of 6.6x for Brazil's largest water utility, one with a 25% five-year EBIT growth profile, screens as cheap. The ORTEX factor scores add weight to that read — SABESP ranks in the 95th percentile on days-to-cover and the 96th on short score relative to its sector, and the stock's dividend score places it near the top of its peer universe. Bears counter with the recent earnings track record. The May print saw the stock fall roughly 4% on the day and extend to a 10% loss over the following week, with regulatory tariff risk and energy-cost headwinds compressing margins. That dynamic — strong long-term growth thesis, difficult near-term execution — has kept the stock range-bound and underperforming Brazilian water peers.

Institutional positioning is notable in one respect. Equatorial S.A. holds 15% of shares and the São Paulo state government holds 18%, meaning the free float is relatively thin for a company of this size. BlackRock and Wellington have each added modestly in recent months. That concentrated ownership limits the scope for large-scale repositioning around the print.

Wednesday's report will test whether SABESP can demonstrate the margin recovery that would justify the valuation gap its long-term bulls have been pricing in — or whether regulatory and cost headwinds once again delay the re-rating.