4.9.1. The Unit Par Value of the Debentures shall not be adjusted. The Debentures shall bear interests corresponding to the cumulated variation at the rate of ninety percent (90%) of the daily average rates for one-day Interbank Deposits Over Extra Group (“DI Rate”), denominated in percentage form based in one year of two hundred and fifty-two (252) business days, as calculated and quoted by CETIP S.A. – Organized Counter of Assets and Derivatives (“CETIP”), over the Unit Par Value or the balance of the Debenture’s Unit Par Value, from the date of subscription of the relevant debentures, and paid at the end of each Capitalization Period, pro rata temporis, pursuant to the formula provided in subsection 4.9.1.1 (“Remuneration”). 4.9.1.1. The Remuneration shall be calculated by using the following formula: J=VNe x (DI – 1)
here's the link wher you can find the "DI Rate" (currently 11.59%) www.cetip.com.br/?lang=en-us click the button "more" (next to the DI Rate and INDEX DI) where one can calculate the accumulated DI rate..
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