American Century Investments Tax-Free Money Market Fund Investor Class

BNTXX

Tax-ExemptRetail
7-day Yield
#623
1.32%
as of 5/31/2026
Net assets
$150.2M
Expense ratio
0.49%
WAM
14
WAL
14
Minimum
$2.5K
Holding details
89% Variable Rate Demand Notes
11% Municipal Bonds
as of 5/31/2026

Performance

Portfolio Securities

SecurityYield%
Deutsche Bank Spears/Lifers Trust 3.550000%1.97%4.49%
St. Paul Port Authority 3.400000%1.62%3.88%
Illinois Housing Development Authority 3.230000%1.60%2.88%
Tender Option Bond Trust Receipts/Certificates 3.470000%1.85%2.77%
South Carolina State Housing Finance & Development Authority 3.290000%1.62%2.70%
Louisiana Housing Corp. 3.230000%1.60%2.62%
Tender Option Bond Trust Receipts/Certificates 3.470000%1.85%2.60%
Louisiana State Local Government Environmental Facilities & Community Development Authority 2.300000%1.99%2.33%
Tender Option Bond Trust Receipts/Certificates 3.200000%1.62%2.22%
Washington State Housing Finance Commission 3.400000%1.67%2.06%
Charlotte-Mecklenburg Hospital Authority (The) 1.980000%1.62%2.06%
Arizona Industrial Development Authority 3.400000%1.59%2.00%
New Mexico Hospital Equipment Loan Council 3.900000%1.40%1.99%
Iowa Finance Authority 3.350000%1.71%1.92%
Louisiana Public Facilities Authority 3.200000%1.65%1.75%
Southwestern Illinois Development Authority 3.500000%1.40%1.73%
Tender Option Bond Trust Receipts/Certificates 3.200000%1.62%1.73%
Louisiana State Local Government Environmental Facilities & Community Development Authority 2.300000%1.99%1.66%
City of Huntington, IN 3.320000%1.65%1.66%
Harris County Hospital District 0.100000%1.61%1.60%
Illinois Housing Development Authority 3.200000%1.40%1.56%
Gary Chicago International Airport Authority 1.900000%1.75%1.50%
Mizuho Floater/Residual Trust 3.470000%1.80%1.44%
Halifax Hospital Medical Center 3.300000%1.43%1.41%
Los Angeles Industrial Development Authority 3.200000%1.62%1.37%
South Carolina Public Service Authority 3.390000%1.77%1.37%
Village of Palatine 3.240000%1.59%1.33%
Illinois Finance Authority 3.150000%1.40%1.33%
Nevada Housing Division 0.040000%1.50%1.33%
Rib Floater Trust Various States 3.400000%1.82%1.33%
Tender Option Bond Trust Receipts/Certificates 3.230000%1.61%1.28%
Mission Economic Development Corp. 3.300000%1.72%1.25%
Lynchburg Industrial Development Authority 2.600000%1.60%1.23%
Fayette County Hospital Authority/PA 1.830000%1.50%1.20%
Hawkins County Industrial Development Board 3.250000%2.75%1.16%
Covington Industrial Development Board 3.400000%1.55%1.00%
State of Texas 3.780000%1.60%1.00%
JEA Water & Sewer System Revenue 3.310000%1.72%1.00%
Mississippi Business Finance Corp. 3.900000%2.85%0.91%
Florida Housing Finance Corp. 3.850000%1.60%0.90%
South Carolina Jobs-Economic Development Authority 3.180000%1.60%0.80%
Metropolitan Government Nashville & Davidson County Industrial Development Board 4.450000%1.60%0.80%
County of Elkhart 3.290000%1.65%0.71%
Harris County Cultural Education Facilities Finance Corp. 3.200000%1.57%0.70%
Rib Floater Trust Various States 3.400000%1.82%0.70%
City of Minneapolis, MN 3.200000%1.62%0.69%
County of Palm Beach, FL 3.160000%1.58%0.67%
Clarksville Public Building Authority 3.230000%1.75%0.67%
Illinois Finance Authority 2.800000%2.80%0.67%
Indiana Finance Authority 2.350000%1.25%0.67%
Tender Option Bond Trust Receipts/Certificates 2.770000%1.92%0.67%
Illinois Finance Authority 3.230000%1.60%0.63%
Illinois Educational Facilities Authority 3.370000%1.60%0.60%
Mizuho Floater/Residual Trust 3.470000%1.80%0.58%
State of Texas 3.460000%1.74%0.58%
RBC Municipal Products, Inc. Trust 3.250000%1.67%0.53%
San Antonio Housing Trust Finance Corp. 3.300000%1.70%0.53%
Bridgeton Industrial Development Authority 3.300000%1.72%0.49%
Tarrant County Housing Finance Corp. 3.210000%1.65%0.48%
Illinois Finance Authority 3.230000%1.60%0.48%
New York State Housing Finance Agency 3.750000%1.55%0.47%
Metropolitan Washington Airports Authority Aviation Revenue 4.000000%1.57%0.47%
City of Lowell, AR1.77%0.45%
Illinois Development Finance Authority 3.310000%1.50%0.40%
South Carolina Jobs-Economic Development Authority 3.290000%1.62%0.40%
Illinois Development Finance Authority 3.140000%1.55%0.39%
Springfield Industrial Development Authority 3.650000%2.07%0.37%
Holland Creek Metropolitan District 3.150000%1.66%0.33%
City of Wright City, MO 3.300000%1.72%0.19%
County of Jefferson, CO 3.250000%1.67%0.16%
County of Hillsborough FL 2.550000%2.50%2.66%
Colorado State Education Loan Program 5.000000%2.60%1.67%
Board of Regents of the University of Texas System 2.390000%2.49%1.00%
County of Harris TX 2.400000%2.50%1.00%
Massachusetts Development Finance Agency 2.470000%2.42%1.00%
Virginia Small Business Financing Authority 2.590000%2.54%1.00%
Colorado State Education Loan Program 5.000000%2.60%0.67%
Michigan Finance Authority 5.000000%2.71%0.67%
City of New York, NY 5.000000%2.54%0.54%
County of San Diego, CA 5.000000%2.91%0.39%
City of Aurora, CO Water Revenue 5.000000%2.64%0.33%
Jefferson County Board of Education, KY 5.000000%5.00%0.23%
Texas Department of Transportation State Highway Fund 5.000000%2.59%0.15%