American Century Investments Tax-Free Money Market Fund Investor Class

BNTXX

Tax-ExemptRetail
7-day Yield
#603
1.58%
as of 1/31/2026
Net assets
$157.4M
Expense ratio
0.49%
WAM
16
WAL
16
Minimum
$2.5K
Holding details
90% Variable Rate Demand Notes
10% Municipal Bonds
as of 1/31/2026

Performance

Portfolio Securities

SecurityYield%
Deutsche Bank Spears/Lifers Trust 3.550000%2.68%4.76%
St. Paul Port Authority 3.400000%2.33%3.39%
Tender Option Bond Trust Receipts/Certificates 3.470000%2.56%2.66%
Illinois Housing Development Authority 3.230000%2.39%2.59%
South Carolina State Housing Finance & Development Authority 3.290000%2.33%2.57%
Tender Option Bond Trust Receipts/Certificates 3.470000%2.56%2.52%
Louisiana Housing Corp. 3.230000%2.39%2.50%
Nevada Housing Division 0.040000%2.35%2.29%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.33%2.12%
Washington State Housing Finance Commission 3.400000%1.34%1.97%
Charlotte-Mecklenburg Hospital Authority (The) 1.980000%2.17%1.97%
Arizona Industrial Development Authority 3.400000%2.37%1.91%
Iowa Finance Authority 3.350000%2.43%1.91%
New Mexico Hospital Equipment Loan Council 3.900000%2.32%1.90%
Louisiana Public Facilities Authority 3.200000%2.35%1.67%
Tender Option Bond Trust Receipts/Certificates 3.200000%2.33%1.65%
Mizuho Floater/Residual Trust 3.470000%2.51%1.60%
Louisiana Offshore Terminal Authority 0.530000%2.45%1.53%
Harris County Hospital District 0.100000%2.32%1.53%
Illinois Housing Development Authority 3.200000%2.35%1.49%
Halifax Hospital Medical Center 3.300000%2.30%1.35%
Mission Economic Development Corp. 3.300000%2.43%1.32%
Los Angeles Industrial Development Authority 3.200000%2.33%1.31%
South Carolina Public Service Authority 3.390000%2.53%1.31%
Village of Palatine 3.240000%2.39%1.27%
Illinois Finance Authority 3.150000%2.35%1.27%
Rib Floater Trust Various States 3.400000%2.53%1.27%
Tender Option Bond Trust Receipts/Certificates 3.230000%2.36%1.22%
Fayette County Hospital Authority/PA 1.830000%2.29%1.21%
Lynchburg Industrial Development Authority 2.600000%2.34%1.18%
Hawkins County Industrial Development Board 3.250000%2.75%1.11%
Tender Option Bond Trust Receipts/Certificates 3.250000%2.38%1.02%
Clarksville Public Building Authority 3.230000%2.47%1.00%
Covington Industrial Development Board 3.400000%2.53%0.95%
State of Texas 3.780000%2.25%0.95%
JEA Water & Sewer System Revenue 3.310000%2.47%0.95%
New York State Housing Finance Agency 0.050000%2.10%0.95%
Southwestern Illinois Development Authority 3.500000%2.45%0.89%
Gary Chicago International Airport Authority 1.900000%2.29%0.89%
New York State Housing Finance Agency 0.070000%2.40%0.88%
State of Texas 3.150000%2.40%0.87%
Nevada Housing Division 3.300000%2.35%0.81%
South Carolina Jobs-Economic Development Authority 3.180000%2.31%0.76%
City of Huntington, IN 3.320000%2.36%0.76%
Illinois Housing Development Authority 3.210000%2.36%0.76%
City of Minneapolis, MN 3.200000%2.33%0.73%
Florida Housing Finance Corp. 3.850000%2.28%0.73%
Rib Floater Trust Various States 3.400000%2.53%0.67%
West Virginia Hospital Finance Authority 4.000000%2.27%0.64%
County of Palm Beach, FL 3.160000%2.29%0.64%
New York City Municipal Water Finance Authority 3.350000%3.35%0.64%
Indiana Finance Authority 2.350000%2.35%0.64%
Illinois Development Finance Authority 3.310000%2.29%0.60%
Illinois Finance Authority 3.230000%2.39%0.60%
Illinois Educational Facilities Authority 3.370000%2.30%0.57%
Wisconsin Housing & Economic Development Authority Home Ownership Revenue 3.300000%2.40%0.57%
Harris County Cultural Education Facilities Finance Corp. 3.200000%2.30%0.57%
Village of Channahon, IL 4.500000%2.15%0.56%
Mizuho Floater/Residual Trust 3.470000%2.51%0.56%
City of Los Angeles, CA 4.000000%1.56%0.53%
RBC Municipal Products, Inc. Trust 3.250000%2.38%0.51%
Colorado Educational & Cultural Facilities Authority 2.950000%3.25%0.51%
Indiana Finance Authority 3.400000%3.40%0.51%
State of Texas 3.150000%2.40%0.51%
San Antonio Housing Trust Finance Corp. 3.300000%2.41%0.51%
Illinois Finance Authority 3.230000%2.39%0.48%
Bridgeton Industrial Development Authority 3.300000%2.43%0.47%
Springfield Industrial Development Authority 3.650000%2.78%0.45%
Tarrant County Housing Finance Corp. 3.210000%2.36%0.45%
Hillsborough County Industrial Development Authority 3.270000%2.37%0.44%
Green Lake Township Economic Development Corp. 4.000000%3.25%0.44%
New York City Housing Development Corp. 0.070000%2.30%0.44%
City of Lowell, AR2.45%0.43%
State of Texas 3.460000%2.39%0.43%
Iowa Finance Authority 1.860000%2.28%0.40%
Port of Tacoma, WA 2.900000%2.30%0.38%
South Carolina Jobs-Economic Development Authority 3.290000%2.33%0.38%
New York State Housing Finance Agency 3.750000%2.10%0.32%
Holland Creek Metropolitan District 3.150000%2.40%0.32%
Mississippi Business Finance Corp. 3.950000%3.40%0.26%
County of Jefferson, CO 3.250000%2.40%0.22%
City of Wright City, MO 3.300000%2.43%0.22%
Illinois Educational Facilities Authority 4.200000%2.25%0.17%
District of Columbia 3.860000%2.28%0.13%
Arizona Health Facilities Authority 3.000000%3.25%0.13%
Hillsborough County Industrial Development Authority 1.800000%2.30%0.10%
Illinois Finance Authority 3.800000%2.40%0.07%
Metropolitan Government Nashville & Davidson County Industrial Development Board 4.450000%2.28%0.06%
Illinois Finance Authority 3.350000%2.35%0.06%
Colorado State Education Loan Program 5.000000%2.26%1.61%
Massachusetts Development Finance Agency 2.600000%2.35%1.59%
State of Washington 5.000000%5.00%0.98%
County of Harris TX 2.650000%2.40%0.95%
Virginia Small Business Financing Authority 2.750000%2.45%0.95%
Board of Regents of the University of Texas System 2.700000%2.35%0.64%
Texas A&M University 2.650000%2.35%0.64%
Colorado State Education Loan Program 5.000000%2.22%0.64%
Michigan Finance Authority 5.000000%2.34%0.64%
City of New York, NY 5.000000%2.25%0.52%
County of San Diego, CA 5.000000%1.89%0.38%
Board of Regents of the University of Texas System 2.700000%2.45%0.22%
Texas Department of Transportation State Highway Fund 5.000000%2.19%0.15%