BILSvsWTBNETF Comparison
ETF 1
BILS
State Street SPDR Bloomberg 3-12 Month T-Bill ETF
This fund is part of
Money Market Bonds
+0.03%
VS
ETF 2
WTBN
WisdomTree Bianco Fixed Income Total Return Fund
This fund is part of
US Aggregate Bonds
-0.17%
State Street SPDR Bloomberg 3-12 Month T-Bill ETF (BILS) belongs to the Money Market Bonds segment. WisdomTree Bianco Fixed Income Total Return Fund (WTBN) is part of the US Aggregate Bonds segment. BILS's top 1 sector exposures are Sovereign. In contrast, WTBN's top sector exposures are Sovereign, Finance and Industrials. BILS is less expensive with a Total Expense Ratio (TER) of 0.1354%, versus 0.64% for WTBN. BILS is up 2.61% year-to-date (YTD) with +$54M in YTD flows. WTBN performs worse with -3.57% YTD performance, and +$17M in YTD flows. Run a side-by-side ETF comparison of BILS and WTBN 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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BILS vs WTBN performance and flow charts
Performance
Cumulative Flows
Historic performance and flows
Data as of 10/02/2026
| 1M | 3M | YTD | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|---|---|
| Perf. | BILS WTBN | +0.28%-2.38% | +0.87%-3.64% | +2.61%-3.57% | +3.61%-3.22% | +14.10%n/a | +19.03%n/a |
| Flows | BILS WTBN | +$35M-$1M | +$60M-$4M | +$54M+$17M | +$104M+$30M | +$1.19B- | +$3.90B- |
Volatility and drawdown
| 3M | 1Y | 3Y | 5Y | ||
|---|---|---|---|---|---|
| Volatility | BILS WTBN | +0.19%+4.76% | +0.18%+3.98% | +0.22%n/a | +0.27%n/a |
| Max drawdown | BILS WTBN | -0.00%-3.82% | -0.00%-5.05% | -0.00%n/a | -0.36%n/a |
| Max drawdown duration | BILS WTBN | 2d88d | 2d215d | 2dn/a | 358dn/a |
Trading data
BILS | WTBN | |
Last sale 10/2/2026 at 1:30 PM | $99.09 | $23.94 |
| Previous close 10/01/2026 | $99.07 | $23.98 |
| Consolidated volume 10/01/2026 | ||
| 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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BILS | WTBN | |
|---|---|---|
| Tracking error | ||
| Tracking difference | ||
| 1 year cumulative return difference | ||
| Best | ||
| Worst | ||
| Daily return difference | ||
| Average | ||
| Worst | ||
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Main metrics
Last update 10/2/2026 at 1:30 PM
Live
Closed
BILS | WTBN | |
|---|---|---|
| Last price | $99.09 | $23.94 |
| 1D performance | +0.02% | -0.17% |
| AuM | $3.90 B | $98.37 M |
| E/R | 0.1354% | 0.64% |
Characteristics
BILS | WTBN | |
|---|---|---|
| Management strategy | Passive | Passive |
| Provider | State Street Investment Management | WisdomTree |
| Benchmark | Bloomberg 3–12 Month U.S. Treasury Bill Index | Bianco Research Fixed Income Index |
| N° of holdings | 18 | 10108 |
| Asset class | Fixed Income | Fixed Income |
| Trailing 12m distribution yield | Join | Join |
| Inception date | September 23, 2020 | December 20, 2023 |
| ESG | No | No |
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Exposure
Countries
BILS
USA
74.24%
Other
25.76%
WTBN
USA
76.91%
Other
23.09%
Sectors
BILS
Sovereign
74.24%
Other
25.76%
WTBN
Sovereign
43%
Finance
8.6%
Industrials
7.28%
Other
41.13%
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Diversification
BILS
Total weight of top 15 holdings out of 15
75.05%
WTBN
Total weight of top 15 holdings out of 15
7.86%
Top 15 holdings
Data as of August 31, 2026
BILS
USA, Bills 0% 21jan2027, USD (364D)
7.28%
USA, Bills 0% 18feb2027, USD (364D)
7.10%
USA, Bills 0% 24dec2026, USD (363D)
7.01%
USA, Bills 0% 7jan2027, USD (182D)
4.60%
USA, Bills 0% 14jan2027, USD (182D)
4.60%
USA, Bills 0% 28jan2027, USD (182D)
4.59%
US912797WB95
4.58%
US912797WC78
4.57%
USA, Bills 0% 3dec2026, USD (182D)
4.49%
USA, Bills 0% 10dec2026, USD (182D)
4.48%
USA, Bills 0% 17dec2026, USD (182D)
4.48%
USA, Bills 0% 4feb2027, USD (182D)
4.43%
USA, Bills 0% 31dec2026, USD (182D)
4.43%
US912797WG82
4.20%
US912797WH65
4.20%
WTBN
BlackRock Cash Funds - Institutional
1.96%
USA, Notes 4.125% 15feb2036, USD (B-2036)
0.47%
USA, Notes 3.875% 15aug2033, USD (E-2033)
0.46%
USA, Notes 4.375% 30nov2030, USD (S-2030)
0.46%
USA, Notes 4.375% 15may2036, USD (C-2036)
0.44%
USA, Notes 4.625% 15feb2035, USD (B-2035)
0.44%
USA, Notes 4.25% 15nov2034, USD (F-2034)
0.44%
USA, Notes 4% 15nov2035, USD (F-2035)
0.43%
USA, Notes 4.375% 15may2034, USD (C-2034)
0.42%
USA, Notes 4.25% 15may2035, USD (C-2035)
0.42%
USA, Notes 4.25% 15aug2035, USD (E-2035)
0.42%
USA, Notes 4% 15feb2034, USD (B-2034)
0.41%
USA, Notes 3.375% 15may2033, USD (C-2033)
0.37%
USA, Notes 1.875% 15feb2032, USD (B-2032)
0.36%
USA, Notes 4% 28feb2030, USD (H-2030)
0.36%
Frequently asked questions about BILS and WTBN
How have the BILS and WTBN ETFs performed in 2026?
As of October 2, 2026, BILS is up 2.61% year-to-date (YTD), while WTBN has lost -3.57%. That puts BILS better performer ahead so far this year.
Which ETF is attracting more investor money: BILS or WTBN?
Year-to-date, the BILS ETF saw +$54M in flows, compared to +$17M for WTBN.
Which ETF is more volatile: BILS or WTBN?
Over the past year, BILS had a volatility of 0.18%, while WTBN experienced 3.98%.
Which ETF is bigger: BILS or WTBN?
As of October 2, 2026, BILS holds $3.90 B in assets under management (AUM), while WTBN manages $98.37 M.
What sectors do the BILS and WTBN ETFs invest in?
BILS leans toward sectors like Sovereign. Meanwhile, WTBN focuses on Sovereign, Finance and Industrials.
What are the top holdings of the BILS ETF and WTBN ETF?
BILS top holdings include USA, Bills 0% 21jan2027, USD (364D), USA, Bills 0% 18feb2027, USD (364D) and USA, Bills 0% 24dec2026, USD (363D). WTBN holds in its top three: BlackRock Cash Funds - Institutional, USA, Notes 4.125% 15feb2036, USD (B-2036) and USA, Notes 3.875% 15aug2033, USD (E-2033).
Which ETF is more diversified: BILS or WTBN?
BILS holds 23 securities with 75.05% of its assets in the top 15. WTBN has 18463 securities and a top 15 weight of 7.86%.
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