Subject: File No. S7-11-09
Investment Company Institute, Average Maturity of Taxable Prime Money Markets, 1998-2009

(Data referenced in footnote 141 of Release No. IC-28807, Money Market Fund Reform)

July 15, 2009

Date Mean Median 10th percentile 25th percentile 75th percentile 90th percentile
1/31/1998 44.2 43 24 35 56 67
2/28/1998 45.9 46 24 37 56 69
3/31/1998 44.6 44 21 33 56 71
4/30/1998 50.1 50 29 39 59 77
5/31/1998 49.1 48 30 38 59 75
6/30/1998 49.4 48 30 36 58 78
7/31/1998 49.1 49 30 38 58 76
8/31/1998 44.2 42 23 31 56 69
9/30/1998 46.2 43 20 31 60 78
10/31/1998 48.2 49 23 38 59 75
11/30/1998 51.3 51 28 42 60 75
12/31/1998 48.7 47 30 38 60 73
1/31/1999 47.7 47 32 39 57 71
2/28/1999 52.1 51 29 44 60 75
3/31/1999 50.2 50 27 41 58 74
4/30/1999 53.6 53 31 44 66 79
5/31/1999 53.2 52 34 43 65 75
6/30/1999 50.9 49 30 40 62 75
7/31/1999 47.9 47 27 38 60 68
8/31/1999 47.2 48 25 39 58 68
9/30/1999 47.4 48 25 37 59 69
10/31/1999 48.2 48 30 38 59 72
11/30/1999 48.6 48 30 38 58 69
12/31/1999 44.4 43 26 33 55 64
1/31/2000 41.3 40 20 30 53 64
2/29/2000 43.2 42 24 34 52 65
3/31/2000 43.7 44 25 34 54 65
4/30/2000 42.6 42 23 32 54 64
5/31/2000 42.5 42 21 31 54 64
6/30/2000 44.5 43 25 34 54 67
7/31/2000 42.5 41 23 32 51 65
8/31/2000 42.4 43 18 30 53 64
9/30/2000 43.1 45 19 29 54 66
10/31/2000 42.8 43 20 31 54 67
11/30/2000 41.4 42 20 29 52 64
12/31/2000 42.3 41 19 29 55 67
1/31/2001 42.5 42 17 29 55 68
2/28/2001 42.2 43 15 29 54 68
3/31/2001 42.1 43 14 28 56 69
4/30/2001 43.1 44 12 30 57 70
5/31/2001 46.8 49 19 33 58 74
6/30/2001 49.5 51 25 40 60 75
7/31/2001 47.6 50 23 35 59 74
8/31/2001 46.5 46 18 35 58 75
9/30/2001 48.1 48 20 41 58 73
10/31/2001 47.4 48 22 38 56 72
11/30/2001 51.3 52 25 44 61 75
12/31/2001 51.7 51 33 45 60 74
1/31/2002 50.9 52 30 44 60 71
2/28/2002 49.4 50 30 43 57 69
3/31/2002 52.1 52 34 45 60 72
4/30/2002 48.8 50 31 40 58 70
5/31/2002 48.7 50 29 43 57 67
6/30/2002 47.7 48 28 40 56 69
7/31/2002 47.2 49 27 37 57 68
8/31/2002 49.0 52 27 40 58 68
9/30/2002 48.1 49 25 40 57 66
10/31/2002 49.2 50 26 41 58 70
11/30/2002 51.4 52 32 45 58 72
12/31/2002 50.1 50 30 42 58 73
1/31/2003 61.0 53 36 44 62 77
2/28/2003 68.6 52 28 42 61 78
3/31/2003 50.8 51 29 44 58 73
4/30/2003 48.8 50 30 40 58 71
5/31/2003 49.0 50 26 41 57 71
6/30/2003 49.9 50 27 41 59 72
7/31/2003 52.6 53 32 46 60 75
8/31/2003 54.2 54 38 47 60 78
9/30/2003 53.2 53 35 45 61 74
10/31/2003 53.6 55 35 47 60 74
11/30/2003 52.8 53 35 47 59 72
12/31/2003 50.6 51 33 42 59 70
1/31/2004 52.9 53 37 46 59 73
2/29/2004 52.8 52 38 46 61 74
3/31/2004 50.9 51 34 42 60 73
4/30/2004 53.6 54 38 48 60 73
5/31/2004 47.8 48 30 42 56 66
6/30/2004 41.9 43 24 34 49 57
7/31/2004 39.8 41 22 33 48 55
8/31/2004 36.5 38 19 29 45 53
9/30/2004 39.3 40 20 30 50 57
10/31/2004 39.5 40 22 31 48 56
11/30/2004 35.6 35 21 28 43 55
12/31/2004 36.4 37 19 28 45 54
1/31/2005 30.2 29 14 20 40 49
2/28/2005 29.6 29 14 20 38 47
3/31/2005 32.5 33 15 21 42 49
4/30/2005 30.7 31 13 21 41 50
5/31/2005 28.7 30 5 18 39 47
6/30/2005 30.7 30 11 21 40 53
7/31/2005 30.0 31 8 18 41 52
8/31/2005 27.4 27 5 15 38 49
9/30/2005 30.9 31 9 18 43 51
10/31/2005 29.1 29 9 18 41 51
11/30/2005 29.2 27 8 18 41 53
12/31/2005 32.1 30 10 20 43 55
1/31/2006 29.9 30 8 18 43 50
2/28/2006 29.7 29 10 17 38 52
3/31/2006 29.0 28 7 16 39 49
4/30/2006 29.7 30 10 17 39 51
5/31/2006 28.5 29 7 15 40 50
6/30/2006 29.8 31 5 17 40 52
7/31/2006 26.1 26 3 13 37 47
8/31/2006 28.1 30 4 13 39 51
9/30/2006 35.0 37 4 20 48 62
10/31/2006 32.2 34 5 19 44 56
11/30/2006 32.6 30 8 18 43 63
12/31/2006 35.7 37 9 20 49 60
1/31/2007 34.0 36 7 19 48 59
2/28/2007 28.0 27 6 12 41 55
3/31/2007 28.6 29 5 9 43 57
4/30/2007 30.6 33 2 11 47 56
5/31/2007 32.4 34 3 15 45 60
6/30/2007 32.8 35 3 17 48 57
7/31/2007 30.3 32 3 15 45 52
8/31/2007 32.9 32 6 14 47 62
9/30/2007 33.3 34 3 11 51 59
10/31/2007 32.1 33 1 14 48 56
11/30/2007 33.0 34 4 15 49 58
12/31/2007 34.9 38 3 15 53 63
1/31/2008 35.1 37 2 19 50 62
2/29/2008 34.4 37 3 18 49 64
3/31/2008 37.5 41 6 20 52 64
4/30/2008 38.3 43 7 23 52 66
5/31/2008 39.4 42 7 22 54 64
6/30/2008 38.6 41 7 25 51 65
7/31/2008 38.9 42 12 25 52 60
8/31/2008 39.1 41 13 25 54 61
9/30/2008 35.6 36 10 23 49 56
10/31/2008 38.8 39 16 26 51 59
11/30/2008 41.5 43 17 32 54 59
12/31/2008 45.0 48 20 36 55 65
1/31/2009 44.8 46 22 34 56 68
2/28/2009 45.8 47 19 36 57 68
3/31/2009 45.1 45 26 35 55 66
4/30/2009 44.6 45 24 33 55 67