MMFの属性別残高推移（2003年）
残高ベース
| . | 法人（件） | 比率（％） | 個人（件） | 比率（％） | 合計（件） |
| Dec-03 | 1,828,377 | 42.0 | 2,521,841 | 58.0 | 4,350,218 |
| Nov-03 | 1,950,997 | 43.3 | 2,557,485 | 56.7 | 4,508,482 |
| Oct-03 | 1,987,261 | 43.4 | 2,591,374 | 56.6 | 4,578,635 |
| Sep-03 | 1,974,359 | 42.8 | 2,643,126 | 57.2 | 4,617,485 |
| Aug-03 | 2,106,279 | 43.9 | 2,687,608 | 56.1 | 4,793,887 |
| July-03 | 2,194,652 | 44.8 | 2,707,622 | 55.2 | 4,902,274 |
| June-03 | 2,214,749 | 44.8 | 2,725,363 | 55.2 | 4,940,112 |
| May-03 | 2,378,298 | 46.3 | 2,758,852 | 53.7 | 5,137,150 |
| Apr-03 | 2,409,834 | 46.3 | 2,796,577 | 53.7 | 5,206,411 |
| Mar-03 | 2,389,995 | 45.7 | 2,839,318 | 54.3 | 5,229,313 |
| Feb-03 | 2,601,537 | 47.4 | 2,884,714 | 52.6 | 5,486,251 |
| Jan-03 | 2,573,410 | 46.8 | 2,925,725 | 53.2 | 5,499,135 |
口座数ベース
| . | 法人（件） | 比率（％） | 個人（件） | 比率（％） | 合計（件） |
| Dec-03 | 25,468 | 1.2 | 2,157,111 | 98.8 | 2,182,579 |
| Nov-03 | 25,750 | 1.2 | 2,172,331 | 98.8 | 2,198,081 |
| Oct-03 | 25,873 | 1.2 | 2,184,974 | 98.8 | 2,210,847 |
| Sep-03 | 25,891 | 1.2 | 2,196,491 | 98.8 | 2,222,382 |
| Aug-03 | 27,323 | 1.2 | 2,312,765 | 98.8 | 2,340,088 |
| July-03 | 27,763 | 1.2 | 2,322,891 | 98.8 | 2,350,654 |
| June-03 | 28,001 | 1.2 | 2,338,532 | 98.8 | 2,366,533 |
| May-03 | 28,127 | 1.2 | 2,352,031 | 98.8 | 2,380,158 |
| Apr-03 | 28,466 | 1.2 | 2,366,346 | 98.8 | 2,394,812 |
| Mar-03 | 28,704 | 1.2 | 2,382,807 | 98.8 | 2,411,511 |
| Feb-03 | 29,286 | 1.2 | 2,396,288 | 98.8 | 2,425,574 |
| Jan-03 | 29,826 | 1.2 | 2,438,360 | 98.8 | 2,468,186 |
（データ出所：社団法人投資信託協会「投資信託」）
