The weighted average effective yield to maturity according to the Russian government bond and Eurobond market index is calculated based on a portfolio of fixed-coupon securities issued in US dollars with a remaining maturity of at least 360 days and an issue volume of at least $500 million. The index includes securities that were quoted on the Cbonds website for at least 5 trading days last month. The quotes are calculated using the Cbonds Estimation system. The revision of the list of issues forming the index, as well as the inclusion of new issues, is carried out monthly.