The iBoxx € Luxembourg is designed to measure the performance of investment grade, EUR-denominated covered bonds (Lettres de Gage) issued in Luxembourg, with a minimum amount outstanding of EUR 500 million and at least one year remaining time to maturity at rebalancing. The bonds must be secured by a general pool of assets in case of issuer insolvency, particularly those conforming to UCITS 22.4 or similar directives. These instruments represent a specific segment of the Luxembourg fixed income market where bonds carry equivalent risk and credit profiles that are considered by the market as covered bonds.