| MBRFY | | - | 1496919 |
| MBRX | | Pharmaceutical Preparations | 1659617 |
| MBUMF | | American Depositary Receipts | 1534281 |
| MBUU | | Ship & Boat Building & Repairing | 1590976 |
| MBVI | | Blank Checks | 2073928 |
| MBWM | | State Commercial Banks | 1042729 |
| MBX | | Pharmaceutical Preparations | 1776111 |
| MC | | Investment Advice | 1596967 |
| MCAG | | Surgical & Medical Instruments & Apparatus | 1859035 |
| MCB | | State Commercial Banks | 1476034 |
| MCBS | | State Commercial Banks | 1747068 |
| MCD | | Retail-Eating Places | 63908 |
| MCFT | | Ship & Boat Building & Repairing | 1638290 |
| MCGA | | Finance Services | 2064658 |
| MCHB | | State Commercial Banks | 1518715 |
| MCHP | | Semiconductors & Related Devices | 827054 |
| MCHX | | Services-Prepackaged Software | 1224133 |
| MCI | | - | 275694 |
| MCK | | Wholesale-Drugs, Proprietaries & Druggists' Sundries | 927653 |
| MCLE | | Services-Health Services | 1827855 |
| MCN | | - | 1289868 |
| MCO | | Services-Consumer Credit Reporting, Collection Agencies | 1059556 |
| MCOM | | Services-Business Services, NEC | 1788841 |
| MCR | | - | 851170 |
| MCRB | | Pharmaceutical Preparations | 1609809 |
| MCRI | | Hotels & Motels | 907242 |
| MCRP | | Motor Vehicle Parts & Accessories | 1993431 |
| MCS | | Services-Motion Picture Theaters | 62234 |
| MCTA | | Services-Misc Health & Allied Services, NEC | 2035992 |
| MCTR | | Services-Advertising Agencies | 1969928 |
| MCUJF | | Pharmaceutical Preparations | 1133519 |
| MCW | | Services-Automotive Repair, Services & Parking | 1853513 |
| MCY | | Fire, Marine & Casualty Insurance | 64996 |
| MD | | Services-Hospitals | 893949 |
| MDAI | | Surgical & Medical Instruments & Apparatus | 1833498 |
| MDB | | Services-Prepackaged Software | 1441816 |
| MDBH | | Finance Services | 1934642 |
| MDCE | | Services-Business Services, NEC | 1404593 |
| MDCX | | Pharmaceutical Preparations | 1997296 |
| MDGL | | Pharmaceutical Preparations | 1157601 |
| MDIA | | Radio Broadcasting Stations | 1784254 |
| MDLN | | Surgical & Medical Instruments & Apparatus | 2046386 |
| MDLZ | | Food and Kindred Products | 1103982 |
| MDNC | | Surgical & Medical Instruments & Apparatus | 1931055 |
| MDRR | | Real Estate Investment Trusts | 1654595 |
| MDT | | Electromedical & Electrotherapeutic Apparatus | 1613103 |
| MDU | | Mining & Quarrying of Nonmetallic Minerals (No Fuels) | 67716 |
| MDV | | Real Estate Investment Trusts | 1645873 |
| MDWD | | Medicinal Chemicals & Botanical Products | 1593984 |
| MDWK | | Beverages | 1295514 |
