CATFvsGNMAETF Comparison
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American Century California Municipal Bond ETF (CATF) belongs to the Municipal Bonds segment. iShares GNMA Bond ETF (GNMA) is part of the MBS & ABS segment. CATF's top 1 sector exposures are Municipal. In contrast, GNMA's top sector exposures are Industrials and Non-Corporate. CATF is more expensive with a Total Expense Ratio (TER) of 0.25%, versus 0.11% for GNMA. CATF is down -1.79% year-to-date (YTD) with +$87M in YTD flows. GNMA performs better with -1.65% YTD performance, and +$36M in YTD flows. Run a side-by-side ETF comparison of CATF and GNMA below, and assess how they stack up in performance, liquidity, risk, exposure, holdings, and more, helping you select the best ETF for your investments.
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CATF vs GNMA performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/15/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | CATF GNMA | -0.31%-0.41% | -3.60%-2.53% | -1.79%-1.65% | -0.82%-1.41% | n/a+15.95% | n/a+0.31% |
| Flows | CATF GNMA | +$57M-$15M | +$64M+$7M | +$87M+$36M | +$92M+$69M | -+$124M | --$12M |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | CATF GNMA | +5.09%+5.77% | +3.23%+4.49% | n/a+5.59% | n/a+6.56% |
| Max drawdown | CATF GNMA | -5.87%-4.45% | -6.34%-5.36% | n/a-5.36% | n/a-15.48% |
| Max drawdown duration | CATF GNMA | 92d52d | 101d229d | n/a229d | n/a1397d |
Trading data
CATF | GNMA | |
Last sale 10/19/2026 at 1:30 PM | $47.74 | $42.10 |
| Previous close 10/16/2026 | $47.98 | $42.27 |
| Consolidated volume 10/16/2026 | ||
| Average volume 30 days | ||
| Average discount or premium 30 days | ||
| Average Bid/Ask spread 30 days |
Replication quality
Data as of September 30, 2026
1-year trailing difference
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CATF
is actively managed and doesn’t replicate an indexCATF | GNMA | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/19/2026 at 1:30 PM
Live
Closed
CATF | GNMA | |
|---|---|---|
| Last price | $47.74 | $42.10 |
| 1D performance | -0.50% | -0.40% |
| AuM | $143.48 M | $416.20 M |
| E/R | 0.25% | 0.11% |
Characteristics
CATF | GNMA | |
|---|---|---|
| Management strategy | Active | Passive |
| Provider | American Century Investments | iShares |
| Benchmark | - | Bloomberg U.S. GNMA Bond Index |
| N° of holdings | 109 | 109 |
| Asset class | - | Bonds |
| Trailing 12m distribution yield | Join | Join |
| Inception date | July 18, 2024 | February 14, 2012 |
| ESG | No | No |
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Exposure
Countries
CATF
USA
39.08%
Other
60.92%
GNMA
USA
48.8%
Other
51.2%
Sectors
CATF
Municipal
39.08%
Other
60.92%
GNMA
Industrials
39.92%
Non-Corporate
8.88%
Other
51.2%
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Diversification
CATF
Total weight of top 15 holdings out of 15
12.15%
GNMA
Total weight of top 15 holdings out of 15
33.91%
Top 15 holdings
Data as of August 31, 2026
CATF
California, 3.5% 1dec2030, USD
1.43%
Riverside Transportation Commission, 4% 1jun2046, USD
0.91%
US684133KT71
0.87%
California, 4% 1sep2043, USD
0.86%
US13032UN611
0.84%
East AWP Joint Powers Authority, 3.125% 1sep2026, USD (2024A)
0.82%
Puerto Rico Sales Tax Financing Corp., 4.329% 1jul2040, USD
0.82%
California Community Choice Financing Authority, 5.25% 1feb2036, USD (2026C)
0.76%
US13048VV394
0.73%
US13032UX453
0.72%
California Community Choice Financing Authority, 5% 1aug2055, USD (2024C)
0.71%
Desert Community College District, 5% 1aug2051, USD (2016)
0.69%
US544647JV34
0.67%
US13032U6J26
0.67%
California Community Choice Financing Authority, 5% 1feb2055, USD (2024D)
0.67%
GNMA
BlackRock Cash Funds - Treasury
8.88%
G2 MA7192, 2% 20feb2051, USD (ABS)
2.59%
US3618N5XQ77
2.51%
G2 MA9360, 4.5% 20dec2053, USD (ABS)
2.42%
US21H0526945
1.97%
US36179WTX64
1.90%
G2 MA8878, 5% 20may2053, USD (ABS)
1.67%
G2 MB0025, 5% 20nov2054, USD (ABS)
1.64%
US36179WJR07
1.62%
G2 MA7880, 2% 20feb2052, USD (ABS)
1.59%
G2 MA8801, 5.5% 20apr2053, USD (ABS)
1.59%
G2 MA6864, 2% 20sep2050, USD (ABS)
1.44%
US36179WLP13
1.40%
US36179WFG87
1.38%
US3617NWEY42
1.32%
Frequently asked questions about CATF and GNMA
How have the CATF and GNMA ETFs performed in 2026?
As of October 15, 2026, CATF is down -1.79% year-to-date (YTD), while GNMA has lost -1.65%. That puts GNMA better performer ahead so far this year.
Which ETF is attracting more investor money: CATF or GNMA?
Year-to-date, the CATF ETF saw +$87M in flows, compared to +$36M for GNMA.
Which ETF is more volatile: CATF or GNMA?
Over the past year, CATF had a volatility of 3.23%, while GNMA experienced 4.49%.
Which ETF is bigger: CATF or GNMA?
As of October 15, 2026, CATF holds $143.48 M in assets under management (AUM), while GNMA manages $416.20 M.
What sectors do the CATF and GNMA ETFs invest in?
CATF leans toward sectors like Municipal. Meanwhile, GNMA focuses on Industrials and Non-Corporate.
What are the top holdings of the CATF ETF and GNMA ETF?
CATF top holdings include California, 3.5% 1dec2030, USD, Riverside Transportation Commission, 4% 1jun2046, USD and US684133KT71. GNMA holds in its top three: BlackRock Cash Funds - Treasury, G2 MA7192, 2% 20feb2051, USD (ABS) and US3618N5XQ77.
Which ETF is more diversified: CATF or GNMA?
CATF holds 312 securities with 12.15% of its assets in the top 15. GNMA has 355 securities and a top 15 weight of 33.91%.
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