In the March 2012 rebalancing a significant number of bonds that were eligible for the index but were being excluded because of a technical error were added to the index. Measures the total market value of all bonds in the index calculated using the volume weighted average price of all TRACE reported transactions from the previous days trading. Include accrued interest. FINRA - Bloomberg Active US Corporate Bond Indices are comprised of the active (most frequently traded) fixed coupon bonds represented by FINRA TRACE, FINRA's transaction reporting facility that disseminates all over-the-counter secondary market transactions in these public bonds. The indices are rebalanced on a monthly basis. Type NBBITR MEMB for constituent information. Index launch date: October 17, 2005.