# Tag: WACC

- [Cost of capital has become the blind spot in Brazil’s new power regulation](https://brazilstockguide.com/behind-the-lines/brazil-power-regulation-wacc-aneel-distributors/) (2026-09-21): Aneel is reviewing the rules that shape investment, losses and productivity at electricity distributors. The industry is asking why the return on capital has been left out.
- [Perfin Passes 20% at Copasa and Gains Clout in Privatized Utility](https://brazilstockguide.com/insights/perfin-passes-20-at-copasa-and-gains-clout-in-privatized-utility/) (2026-06-16): The firm founded by Ralph Rosenberg strengthens its position in the Minas Gerais water company, where Equatorial will serve as anchor investor.
- [Sabesp RAB Validation Tightens Framework for 2026 Tariff Reset](https://brazilstockguide.com/insights/sabesp-rab-validation-tightens-framework-for-2026-tariff-reset/) (2025-11-24): São Paulo regulator approves R$88 billion asset base, defining how Brazil’s largest water utility will enter its first full post-privatization tariff cycle.