The weighted average duration according to the index of the Turkish corporate high-risk bonds and Eurobonds market is calculated on the basis of a portfolio of fixed coupon rate securities issued in USD 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 16 trading days last month and have a credit rating of at least B3/B- and no higher than Ba1/BB+ from at least two leading reviewers of the list of issues forming the index, as well as the inclusion of new issues on a monthly basis.