Seasonal patterns for Companhia De Saneamento Basico Do Estado De Sao Paulo - Sabesp American Depositary Shares (Each Repstg 250 Common Shares) (SBS): implied volatility, historical volatility and option volume averaged for each day of the year, going back to 2014.
For the latest figures, see SBS implied volatility.
The following chart shows how implied volatility (IV30) trended by calendar period to detect seasonal patterns during the year.