American Century Investments Tax-Free Money Market Fund Investor Class

BNTXX

Tax-ExemptRetail
7-day Yield
#456
2.52%
as of 9/30/2025
Net assets
$157.8M
Expense ratio
0.50%
WAM
21
WAL
21
Minimum
$2.5K
Holding details
87% Variable Rate Demand Notes
13% Municipal Bonds
as of 9/30/2025

Performance

Portfolio Securities

SecurityYield%
Deutsche Bank Spears/Lifers Trust 3.550000%3.29%4.75%
St. Paul Port Authority 3.400000%2.97%3.38%
South Carolina State Housing Finance & Development Authority 3.290000%2.94%2.82%
Tender Option Bond Trust Receipts/Certificates 3.470000%3.17%2.67%
Illinois Housing Development Authority 3.230000%3.02%2.63%
Tender Option Bond Trust Receipts/Certificates 3.470000%3.17%2.54%
Roanoke Economic Development Authority 3.670000%2.92%2.53%
Minnesota Higher Education Facilities Authority 3.250000%2.94%2.50%
Louisiana Housing Corp. 3.230000%3.02%2.49%
Illinois Development Finance Authority 3.250000%2.90%2.46%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.94%2.11%
Iowa Finance Authority 3.350000%3.09%2.06%
Charlotte-Mecklenburg Hospital Authority (The) 1.980000%2.90%1.74%
Louisiana Public Facilities Authority 3.200000%2.90%1.67%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.94%1.65%
Mizuho Floater/Residual Trust 3.470000%3.12%1.59%
Washington State Housing Finance Commission 3.400000%2.73%1.58%
Harris County Hospital District 0.100000%2.93%1.58%
Louisiana Offshore Terminal Authority 0.530000%3.25%1.53%
Deutsche Bank Spears/Lifers Trust 3.800000%3.54%1.51%
Illinois Housing Development Authority 3.200000%3.15%1.45%
Halifax Hospital Medical Center 3.300000%3.25%1.34%
South Carolina Public Service Authority 3.390000%3.07%1.33%
Mission Economic Development Corp. 3.300000%3.04%1.31%
Village of Palatine 3.240000%2.89%1.27%
Illinois Finance Authority 3.150000%3.17%1.27%
North Dakota Housing Finance Agency 3.820000%2.90%1.27%
Rib Floater Trust Various States 3.400000%3.14%1.27%
Los Angeles Industrial Development Authority 3.200000%2.94%1.22%
Tender Option Bond Trust Receipts/Certificates 3.230000%2.97%1.22%
Fayette County Hospital Authority/PA 1.830000%2.92%1.20%
Harris County Cultural Education Facilities Finance Corp. 3.200000%3.20%1.20%
Wisconsin Housing & Economic Development Authority Home Ownership Revenue 3.300000%3.20%1.14%
Nevada Housing Division 3.300000%3.15%1.12%
Hawkins County Industrial Development Board 3.250000%3.25%1.11%
Tender Option Bond Trust Receipts/Certificates 3.250000%2.99%1.01%
Clarksville Public Building Authority 3.230000%3.08%0.99%
Covington Industrial Development Board 3.400000%3.33%0.95%
JEA Water & Sewer System Revenue 3.310000%3.01%0.95%
Southwestern Illinois Development Authority 3.500000%3.30%0.89%
Gary Chicago International Airport Authority 1.900000%2.93%0.89%
New York State Housing Finance Agency 0.070000%3.20%0.88%
City of Minneapolis, MN 3.200000%2.94%0.80%
South Carolina Jobs-Economic Development Authority 3.180000%2.92%0.76%
City of Huntington, IN 3.320000%2.97%0.76%
Illinois Housing Development Authority 3.210000%2.91%0.76%
Nevada Housing Division 0.040000%3.15%0.69%
Rib Floater Trust Various States 3.400000%3.14%0.67%
County of Palm Beach, FL 3.160000%2.90%0.63%
Illinois Finance Authority 3.230000%3.02%0.60%
Illinois Educational Facilities Authority 3.370000%2.95%0.57%
Mizuho Floater/Residual Trust 3.470000%3.12%0.56%
Bridgeton Industrial Development Authority 3.300000%3.04%0.56%
State of Texas 3.150000%3.20%0.55%
Lynchburg Industrial Development Authority 2.600000%3.07%0.54%
City of Los Angeles, CA 4.000000%2.95%0.53%
RBC Municipal Products, Inc. Trust 3.250000%2.99%0.51%
San Antonio Housing Trust Finance Corp. 3.300000%3.02%0.51%
Tarrant County Housing Finance Corp. 3.210000%2.97%0.50%
Illinois Finance Authority 3.230000%3.02%0.48%
Springfield Industrial Development Authority 3.650000%3.39%0.45%
Hillsborough County Industrial Development Authority 3.270000%2.98%0.44%
New York City Housing Development Corp. 0.070000%2.90%0.44%
City of Lowell, AR2.95%0.43%
Port of Tacoma, WA 2.900000%2.90%0.38%
South Carolina Jobs-Economic Development Authority 3.290000%2.94%0.38%
Metropolitan Transportation Authority 0.360000%3.90%0.35%
Illinois Development Finance Authority 3.340000%2.89%0.33%
Iowa Finance Authority 1.860000%2.89%0.30%
County of Jefferson, CO 3.250000%3.10%0.22%
City of Wright City, MO 3.300000%3.04%0.22%
Illinois Educational Facilities Authority 3.400000%3.15%0.21%
Arizona Industrial Development Authority 0.320000%3.90%0.18%
Metropolitan Transportation Authority 3.850000%3.85%0.13%
County of Allen, OH Hospital Facilities Revenue 1.950000%2.92%0.06%
State of Texas 3.150000%3.20%0.00%
Colorado State Education Loan Program 5.000000%2.55%1.61%
San Francisco City & County Public Utilities Commission Wastewater Revenue 1.000000%3.65%1.58%
Massachusetts Development Finance Agency 2.750000%2.64%1.58%
County of Harris TX 2.730000%2.68%1.10%
State of Washington 5.000000%2.55%0.99%
Texas A&M University 2.850000%2.65%0.95%
University of California 2.500000%2.55%0.95%
Michigan Finance Authority 5.000000%2.69%0.65%
Santa Clarita Valley Water Agency 2.680000%2.43%0.63%
County of Hillsborough FL 2.710000%2.71%0.63%
New York City Housing Development Corp. 3.300000%2.73%0.60%
City of New York, NY 5.000000%2.45%0.53%
County of San Diego, CA 5.000000%2.23%0.38%
Port Authority of New York & New Jersey 5.000000%2.61%0.26%
County of Palm Beach, FL 5.000000%2.59%0.19%