Index performance data prior to launch dates are based on backtesting, i.e., calculations of how the index might have performed prior to launch if it had existed using the same index methodology employed by Dow Jones now. An independent Shari`ah Supervisory Board counsels Dow Jones Indexes on matters related to the compliance of index-eligible companies. Members of the Board include: Sheikh Abdul Sattar Abu Ghuddah (Syria); Sheikh Nizam Yaquby (Bahrain); Sheikh Dr. Mohamed A. Elgari (Saudi Arabia); Sheikh Yusuf Talal DeLorenzo (US); Sheikh Dr. Mohd Daud Baker (Malaysia).

Sukuk Index slips On 27 February 2009 the Sukuk Index stood at 87.34, down from 90.35 at end-2008 and 111 a year ago.

The Dow Jones Citigroup Sukuk Index, which is based at 100 on 30 September 2005 was the first index to measure the performance of global bonds that comply with Islamic investment guidelines. The index is made up of investment-grade, US dollar-denominated Sukuk. To be included in the index, a bond must comply with both Shari'ah and the Bahrain-based Auditing & Accounting Organisation of Islamic Financial Institutions (AAOIFI) standards for tradable Sukuk. It also must have a minimum maturity of one year, a minimum issue size of $250 million, and an explicit or implicit rating of at least BBB-/Baa3 by leading rating agencies.