Following is the impact of the constituent changes on the sector-based sub-indices of Markit CDX.NA.IG.26 that will roll on 21 March 2016. Please note that this list remains provisional until publication of the final annexes for the indices.
| Sub-index Name | Removals | Additions |
| Markit CDX.NA.IG.ENRG | TECK RESOURCES LIMITED | HESS CORPORATION |
| Markit CDX.NA.IG.ENRG | WEATHERFORD INTERNATIONAL LTD. | |
| Markit CDX.NA.IG.FIN | ACE INA HOLDINGS INC. | LINCOLN NATIONAL CORPORATION |
| | | HOST HOTELS & RESORTS, L.P. |
| Markit CDX.NA.IG.CONS | YUM! BRANDS, INC. | |
| Markit CDX.NA.IG.INDU | | PACKAGING CORPORATION OF AMERICA |