American Century Investments Tax-Free Money Market Fund Investor Class

BNTXX

Tax-ExemptRetail
7-day Yield
#652
1.69%
as of 2/28/2026
Net assets
$159.1M
Expense ratio
0.49%
WAM
15
WAL
15
Minimum
$2.5K
Holding details
92% Variable Rate Demand Notes
8% Municipal Bonds
as of 2/28/2026

Performance

Portfolio Securities

SecurityYield%
Deutsche Bank Spears/Lifers Trust 3.550000%2.28%4.71%
St. Paul Port Authority 3.400000%1.93%3.35%
Illinois Housing Development Authority 3.230000%1.98%2.72%
Tender Option Bond Trust Receipts/Certificates 3.470000%2.16%2.63%
South Carolina State Housing Finance & Development Authority 3.290000%1.93%2.55%
Tender Option Bond Trust Receipts/Certificates 3.470000%2.16%2.49%
Louisiana Housing Corp. 3.230000%1.98%2.47%
Nevada Housing Division 0.040000%1.95%2.26%
Tender Option Bond Trust Receipts/Certificates 3.200000%1.93%2.09%
Washington State Housing Finance Commission 3.400000%2.25%1.95%
Charlotte-Mecklenburg Hospital Authority (The) 1.980000%1.93%1.95%
Arizona Industrial Development Authority 3.400000%1.94%1.89%
Iowa Finance Authority 3.350000%2.03%1.89%
New Mexico Hospital Equipment Loan Council 3.900000%1.90%1.88%
Louisiana State Local Government Environmental Facilities & Community Development Authority, Louisiana Local Government Environmental Facilities & Community Development Auth 2.300000%2.30%1.73%
Louisiana Public Facilities Authority 3.200000%1.90%1.65%
Southwestern Illinois Development Authority 3.500000%2.05%1.63%
Tender Option Bond Trust Receipts/Certificates 3.200000%1.93%1.63%
Mizuho Floater/Residual Trust 3.470000%2.11%1.58%
Louisiana Offshore Terminal Authority 0.530000%2.15%1.51%
Harris County Hospital District 0.100000%1.85%1.51%
Illinois Housing Development Authority 3.200000%1.95%1.48%
Halifax Hospital Medical Center 3.300000%1.90%1.33%
State of Texas 3.150000%2.05%1.31%
Mission Economic Development Corp. 3.300000%2.03%1.30%
Los Angeles Industrial Development Authority 3.200000%1.93%1.29%
South Carolina Public Service Authority 3.390000%2.07%1.29%
Village of Palatine 3.240000%1.99%1.26%
Illinois Finance Authority 3.150000%2.05%1.26%
Louisiana State Local Government Environmental Facilities & Community Development Authority, Louisiana Local Government Environmental Facilities & Community Development Auth 2.300000%2.30%1.26%
Rib Floater Trust Various States 3.400000%2.13%1.26%
Fayette County Hospital Authority/PA 1.830000%1.88%1.19%
Lynchburg Industrial Development Authority 2.600000%1.98%1.16%
Hawkins County Industrial Development Board 3.250000%2.60%1.10%
Tender Option Bond Trust Receipts/Certificates 3.250000%1.98%1.01%
Clarksville Public Building Authority 3.230000%2.06%0.99%
Covington Industrial Development Board 3.400000%2.23%0.94%
State of Texas 3.780000%2.17%0.94%
JEA Water & Sewer System Revenue 3.310000%2.02%0.94%
New York State Housing Finance Agency 0.050000%1.70%0.94%
Tender Option Bond Trust Receipts/Certificates 3.230000%1.96%0.94%
Gary Chicago International Airport Authority 1.900000%1.89%0.88%
State of Texas 3.150000%2.05%0.86%
Florida Housing Finance Corp. 3.850000%1.93%0.85%
Nevada Housing Division 3.300000%1.95%0.80%
South Carolina Jobs-Economic Development Authority 3.180000%1.91%0.75%
City of Huntington, IN 3.320000%1.96%0.75%
City of Minneapolis, MN 3.200000%1.93%0.72%
Rib Floater Trust Various States 3.400000%2.13%0.66%
West Virginia Hospital Finance Authority 4.000000%1.87%0.63%
County of Palm Beach, FL 3.160000%1.89%0.63%
Indiana Finance Authority 2.350000%2.05%0.63%
Illinois Finance Authority 3.230000%1.98%0.60%
Illinois Development Finance Authority 3.310000%1.88%0.59%
Illinois Educational Facilities Authority 3.370000%1.90%0.57%
Village of Channahon, IL 4.500000%1.75%0.56%
Colorado Educational & Cultural Facilities Authority 4.050000%1.90%0.56%
Harris County Cultural Education Facilities Finance Corp. 3.200000%1.90%0.56%
Mizuho Floater/Residual Trust 3.470000%2.11%0.55%
City of Los Angeles, CA 4.000000%2.47%0.52%
State of Texas 3.150000%2.05%0.51%
RBC Municipal Products, Inc. Trust 3.250000%1.98%0.50%
San Antonio Housing Trust Finance Corp. 3.300000%2.01%0.50%
Illinois Finance Authority 3.230000%1.98%0.47%
Bridgeton Industrial Development Authority 3.300000%2.03%0.46%
Springfield Industrial Development Authority 3.650000%2.38%0.45%
Tarrant County Housing Finance Corp. 3.210000%1.96%0.45%
Hillsborough County Industrial Development Authority 3.270000%1.97%0.44%
New York City Housing Development Corp. 0.070000%2.19%0.44%
Massachusetts Health & Educational Facilities Authority 4.000000%1.90%0.44%
City of Lowell, AR2.00%0.42%
State of Texas 3.460000%1.94%0.42%
Iowa Finance Authority 1.860000%1.88%0.39%
Port of Tacoma, WA 2.900000%1.87%0.38%
South Carolina Jobs-Economic Development Authority 3.290000%1.93%0.38%
New York State Housing Finance Agency 3.750000%1.70%0.31%
Holland Creek Metropolitan District 3.150000%2.00%0.31%
New York City Transitional Finance Authority Future Tax Secured Revenue 1.900000%1.90%0.31%
Mississippi Business Finance Corp. 3.800000%2.07%0.29%
County of Jefferson, CO 3.250000%1.98%0.22%
City of Wright City, MO 3.300000%2.03%0.22%
State of Texas 1.690000%2.00%0.19%
Mississippi Business Finance Corp. 0.080000%2.07%0.18%
Illinois Educational Facilities Authority 4.200000%1.90%0.17%
Mississippi Business Finance Corp. 4.620000%2.07%0.17%
City of New York, NY 0.650000%1.90%0.17%
District of Columbia 3.860000%1.85%0.13%
Hillsborough County Industrial Development Authority 1.800000%1.85%0.09%
Illinois Finance Authority 3.800000%2.00%0.07%
Metropolitan Government Nashville & Davidson County Industrial Development Board 4.450000%1.93%0.06%
Colorado State Education Loan Program 5.000000%2.23%1.59%
Massachusetts Development Finance Agency 2.600000%2.35%1.57%
County of Harris TX 2.650000%2.20%0.94%
Virginia Small Business Financing Authority 2.750000%2.45%0.94%
Board of Regents of the University of Texas System 2.390000%2.39%0.94%
Michigan Finance Authority 5.000000%2.33%0.64%
Colorado State Education Loan Program 5.000000%2.19%0.63%
City of New York, NY 5.000000%2.06%0.52%
County of San Diego, CA 5.000000%1.83%0.37%
Texas Department of Transportation State Highway Fund 5.000000%2.08%0.14%