American Century Investments Tax-Free Money Market Fund Investor Class

BNTXX

Tax-ExemptRetail
7-day Yield
#627
2.28%
as of 9/12/2025
Net assets
$160.8M
Expense ratio
0.50%
WAM
24
WAL
24
Minimum
$2.5K
Holding details
86% Variable Rate Demand Notes
14% Municipal Bonds
as of 8/31/2025

Performance

Portfolio Securities

SecurityYield%
Deutsche Bank Spears/Lifers Trust 3.550000%3.13%4.67%
St. Paul Port Authority 3.400000%2.81%3.32%
South Carolina State Housing Finance & Development Authority 3.290000%2.78%2.77%
Tender Option Bond Trust Receipts/Certificates 3.470000%3.01%2.62%
Illinois Housing Development Authority 3.230000%2.80%2.58%
Tender Option Bond Trust Receipts/Certificates 3.470000%3.01%2.49%
Roanoke Economic Development Authority 3.670000%2.70%2.49%
Minnesota Higher Education Facilities Authority 3.250000%2.85%2.46%
Louisiana Housing Corp. 3.230000%2.80%2.44%
Illinois Development Finance Authority 3.250000%2.85%2.41%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.78%2.07%
Iowa Finance Authority 3.350000%2.93%2.02%
Washington State Housing Finance Commission 3.400000%2.81%1.87%
Charlotte-Mecklenburg Hospital Authority (The) 1.980000%2.76%1.71%
Louisiana Public Facilities Authority 3.200000%2.90%1.64%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.78%1.62%
Mizuho Floater/Residual Trust 3.470000%2.96%1.56%
Harris County Hospital District 0.100000%2.77%1.56%
Deutsche Bank Spears/Lifers Trust 3.800000%3.38%1.51%
Louisiana Offshore Terminal Authority 0.530000%2.85%1.50%
Halifax Hospital Medical Center 3.300000%2.90%1.32%
South Carolina Public Service Authority 3.390000%2.87%1.30%
Mission Economic Development Corp. 3.300000%2.88%1.29%
Village of Palatine 3.240000%2.89%1.24%
Illinois Finance Authority 3.150000%2.80%1.24%
North Dakota Housing Finance Agency 3.820000%2.73%1.24%
Rib Floater Trust Various States 3.400000%2.98%1.24%
Los Angeles Industrial Development Authority 3.200000%2.78%1.20%
Tender Option Bond Trust Receipts/Certificates 3.230000%2.81%1.20%
Fayette County Hospital Authority/PA 1.830000%2.70%1.18%
Wisconsin Housing & Economic Development Authority Home Ownership Revenue 3.300000%2.85%1.12%
Nevada Housing Division 3.300000%2.80%1.10%
Hawkins County Industrial Development Board 3.250000%3.75%1.09%
Illinois Housing Development Authority 3.200000%2.75%1.09%
Tender Option Bond Trust Receipts/Certificates 3.250000%2.83%1.00%
Clarksville Public Building Authority 3.230000%2.93%0.98%
Covington Industrial Development Board 3.400000%2.95%0.93%
JEA Water & Sewer System Revenue 3.310000%2.81%0.93%
Southwestern Illinois Development Authority 3.500000%3.05%0.87%
Gary Chicago International Airport Authority 1.900000%2.77%0.87%
New York State Housing Finance Agency 0.070000%2.80%0.86%
Tender Option Bond Trust Receipts/Certificates 4.350000%4.05%0.85%
City of Huntington, IN 3.320000%2.81%0.81%
City of Minneapolis, MN 3.200000%2.78%0.78%
South Carolina Jobs-Economic Development Authority 3.180000%2.76%0.75%
Illinois Housing Development Authority 3.210000%2.91%0.75%
Nevada Housing Division 0.040000%2.80%0.68%
County of Elkhart 3.290000%2.81%0.66%
Rib Floater Trust Various States 3.400000%2.98%0.66%
County of Palm Beach, FL 3.160000%2.74%0.62%
Illinois Finance Authority 3.230000%2.80%0.59%
Illinois Educational Facilities Authority 3.370000%2.75%0.56%
Mizuho Floater/Residual Trust 3.470000%2.96%0.55%
Bridgeton Industrial Development Authority 3.300000%2.88%0.55%
Lynchburg Industrial Development Authority 2.600000%3.00%0.53%
City of Los Angeles, CA 4.000000%3.03%0.52%
RBC Municipal Products, Inc. Trust 3.250000%2.83%0.50%
San Antonio Housing Trust Finance Corp. 3.300000%2.86%0.50%
Tarrant County Housing Finance Corp. 3.210000%2.81%0.49%
Iowa Finance Authority 1.860000%2.73%0.47%
Illinois Finance Authority 3.230000%2.80%0.47%
Hillsborough County Industrial Development Authority 3.270000%2.83%0.44%
Springfield Industrial Development Authority 3.650000%3.23%0.44%
New York City Housing Development Corp. 0.070000%2.95%0.44%
City of Lowell, AR2.80%0.42%
Lower Cape Fear Water & Sewer Authority 3.230000%2.84%0.37%
South Carolina Jobs-Economic Development Authority 3.290000%2.78%0.37%
Illinois Development Finance Authority 3.340000%2.73%0.33%
County of Jefferson, CO 3.250000%2.85%0.21%
City of Wright City, MO 3.300000%2.88%0.21%
Mizuho Floater/Residual Trust 3.470000%2.94%0.21%
Charlotte-Mecklenburg Hospital Authority (The) 2.850000%3.95%0.21%
Illinois Educational Facilities Authority 3.400000%2.80%0.20%
Mississippi Business Finance Corp., Mississippi Business Finance Corps. 1.900000%3.93%0.18%
Tender Option Bond Trust Receipts/Certificates 1.550000%4.05%0.14%
Missouri Development Finance Board 3.850000%3.90%0.13%
Harris County Cultural Education Facilities Finance Corp. 4.100000%2.85%0.11%
City of New York, NY 3.950000%3.95%0.07%
State of Texas 3.150000%2.77%0.00%
Colorado State Education Loan Program 5.000000%2.43%1.59%
Massachusetts Development Finance Agency 2.750000%2.69%1.56%
San Francisco City & County Public Utilities Commission Wastewater Revenue 1.000000%3.47%1.55%
County of Harris TX 2.730000%2.68%1.08%
State of Washington 5.000000%2.33%0.97%
University of California 3.050000%2.80%0.93%
Texas A&M University 2.850000%2.70%0.93%
New York City Housing Development Corp. 3.300000%2.62%0.87%
Michigan Finance Authority 5.000000%2.63%0.64%
County of Hillsborough FL 3.000000%2.75%0.62%
Santa Clarita Valley Water Agency 2.680000%2.48%0.62%
Illinois Municipal Electric Agency 4.000000%2.53%0.62%
City of New York, NY 5.000000%2.32%0.52%
University of California 3.000000%2.75%0.47%
County of San Diego, CA 5.000000%2.15%0.37%
Port Authority of New York & New Jersey 5.000000%2.38%0.25%
County of Palm Beach, FL 5.000000%2.40%0.19%