Following are the provisional names expected for the upcoming MCDX Series 31 index that will roll on 03 October, 2018. Eighteen names were selected following the first round of voting by the MCDX Index Advisory Committee Members. Another round of voting will occur to determine the final two names selected for inclusion. Please note that this list remains provisional till publication of the final annex for the index.
| Issuer |
| California Health Facilities Financing Authority |
| CHICAGO O'HARE INTERNATIONAL AIRPORT |
| City of Chicago |
| Commonwealth of Kentucky |
| Commonwealth of Pennsylvania |
| Dallas/Fort Worth International Airport |
| Metropolitan Transportation Authority |
| North Texas Tollway Authority |
| Pennsylvania Economic Development Financing Authority, Harrisburg, Pennsylvania |
| South Carolina Public Service Authority |
| State of California |
| State of Connecticut |
| State of Illinois |
| State of New Jersey |
| The City of Philadelphia, Pennsylvania |
| The New Jersey Transportation Trust Fund Authority |
| The Pennsylvania Turnpike Commission |
| The Port Authority of New York and New Jersey |