| MACR | Macromedia Inc. | 7 |
| MANU | Manugistics Group Inc | 7 |
| MAT | Mattel Inc. | 3 |
| MCD | McDonald's Corp. | 2 |
| MCDT | McData Corporation | 4 |
| MCHP | Microchip Technology Inc. | 4 |
| MCK | McKesson Corporation | 5 |
| MDT | Medtronic, Inc. | 9 |
| MEDI | Medimmune Inc. | 8 |
| MEL | Mellon Financial Corp. | 4 |
| MER | Merrill Lynch & Co., Inc. | 2 |
| MERQ | Mercury Interactive Corp. | 7 |
| MIR | Mirant Corporation | 6 |
| MLNM | Millennium Pharmaceuticals | 1 |
| MMC | Marsh & McLennan Companies, Inc. | 7 |
| MMM | Minnesota Mining & Manufacturig Company | 4 |
| MO | Philip Morris Companies Inc. | 1 |
| MOT | Motorola Inc. | 1 |
| MRK | Merck & Co. Inc. | 8 |
| MRVL | Marvell Technologies Ltd. | 10 |
| MSFT | Microsoft Corporation | 10 |
| MSO | Martha Stewart Living Omnimedia, Inc. | 1 |
| MU | Micron Technology Inc. | 4 |
| MUSE | Micromuse, Inc. | 4 |
| MWD | Morgan Stanley & Co. | 7 |
| MXIM | Maxim Integrated Products, Inc. | 6 |
| MXT | Metris Companies Inc. | 1 |
| MYG | Maytag Corp. | 10 |
| MYL | Mylan Laboratories Inc. | 10 |
|
