NTSX vs. IEI
NTSX (WisdomTree U.S. Efficient Core Fund) and IEI (iShares 3-7 Year Treasury Bond ETF) are both exchange-traded funds - NTSX is a Diversified Portfolio fund actively managed by WisdomTree, while IEI is a Government Bonds fund tracking the ICE U.S. Treasury 3-7 Year Bond Index. NTSX is actively managed, while IEI is passively managed. Over the past 5 years, NTSX returned 9.23%/yr vs 0.21%/yr for IEI. At a 0.14 correlation, their price movements are largely independent. NTSX charges 0.20%/yr vs 0.15%/yr for IEI.
Performance
NTSX vs. IEI - Performance Comparison
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Returns By Period
In the year-to-date period, NTSX achieves a 7.28% return, which is significantly higher than IEI's -0.30% return.
NTSX
- 1D
- 0.53%
- 1M
- -0.68%
- YTD
- 7.28%
- 6M
- 7.49%
- 1Y
- 23.34%
- 3Y*
- 18.55%
- 5Y*
- 9.23%
- 10Y*
- —
IEI
- 1D
- -0.12%
- 1M
- 0.10%
- YTD
- -0.30%
- 6M
- -0.00%
- 1Y
- 3.16%
- 3Y*
- 3.77%
- 5Y*
- 0.21%
- 10Y*
- 1.24%
NTSX vs. IEI - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | |
|---|---|---|---|---|---|---|---|---|---|
NTSX WisdomTree U.S. Efficient Core Fund | 7.28% | 18.82% | 20.20% | 22.70% | -25.84% | 22.21% | 24.87% | 32.03% | -7.87% |
IEI iShares 3-7 Year Treasury Bond ETF | -0.30% | 6.96% | 1.81% | 4.42% | -9.51% | -2.54% | 6.95% | 5.71% | 2.83% |
Correlation
The correlation between NTSX and IEI is 0.37, which is low. Their price movements are largely independent, making them effective diversification partners.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.37 |
Correlation (3Y) Calculated over the trailing 3-year period | 0.31 |
Correlation (5Y) Calculated over the trailing 5-year period | 0.28 |
Correlation (All Time) Calculated using the full available price history since Aug 2, 2018 | 0.14 |
Over the past year, NTSX and IEI have become more correlated (0.37) than their long-term average of 0.14, meaning their price movements have been converging.
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Return for Risk
NTSX vs. IEI — Risk / Return Rank
NTSX
IEI
NTSX vs. IEI - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for WisdomTree U.S. Efficient Core Fund (NTSX) and iShares 3-7 Year Treasury Bond ETF (IEI). Risk-adjusted metrics are performance indicators that assess an investment's returns in relation to its risk, enabling a more accurate comparison of different investment options.
Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.
| NTSX | IEI | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.72 | ||
| Sortino ratioReturn per unit of downside risk | +0.81 | ||
| Omega ratioGain probability vs. loss probability | 1.31 | 1.17 | +0.14 |
| Calmar ratioReturn relative to maximum drawdown | 2.42 | 1.19 | +1.23 |
| Martin ratioReturn relative to average drawdown | 10.43 | 3.35 | +7.08 |
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Drawdowns
NTSX vs. IEI - Drawdown Comparison
The maximum NTSX drawdown since its inception was -31.34%, which is greater than IEI's maximum drawdown of -14.60%. Use the drawdown chart below to compare losses from any high point for NTSX and IEI.
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Drawdown Indicators
| NTSX | IEI | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -31.34% | -14.60% | -16.74% |
Max Drawdown (1Y)Largest decline over 1 year | -9.16% | -2.50% | -6.66% |
Max Drawdown (3Y)Largest decline over 3 years | -16.82% | -3.66% | -13.16% |
Max Drawdown (5Y)Largest decline over 5 years | -31.34% | -13.88% | -17.46% |
Max Drawdown (10Y)Largest decline over 10 years | — | -14.60% | — |
Current DrawdownCurrent decline from peak | -2.27% | -1.74% | -0.53% |
Average DrawdownAverage peak-to-trough decline | -6.78% | -2.67% | -4.11% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 2.13% | 0.89% | +1.24% |
Volatility
NTSX vs. IEI - Volatility Comparison
WisdomTree U.S. Efficient Core Fund (NTSX) has a higher volatility of 5.05% compared to iShares 3-7 Year Treasury Bond ETF (IEI) at 0.98%. This indicates that NTSX's price experiences larger fluctuations and is considered to be riskier than IEI based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| NTSX | IEI | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 5.05% | 0.98% | +4.07% |
Volatility (6M)Calculated over the trailing 6-month period | 10.34% | 2.18% | +8.16% |
Volatility (1Y)Calculated over the trailing 1-year period | 12.92% | 3.00% | +9.92% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 17.13% | 4.78% | +12.35% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 18.30% | 3.93% | +14.37% |
NTSX vs. IEI - Expense Ratio Comparison
NTSX has a 0.20% expense ratio, which is higher than IEI's 0.15% expense ratio. However, both funds are considered low-cost compared to the broader market, where average expense ratios usually range from 0.3% to 0.9%.
Dividends
NTSX vs. IEI - Dividend Comparison
NTSX's dividend yield for the trailing twelve months is around 1.09%, less than IEI's 3.64% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
IEI iShares 3-7 Year Treasury Bond ETF | 3.64% | 3.48% | 3.18% | 2.36% | 1.37% | 0.73% | 1.12% | 2.01% | 1.95% | 1.51% | 1.33% | 1.39% |
NTSX WisdomTree U.S. Efficient Core Fund | 1.09% | 1.14% | 1.14% | 1.21% | 1.36% | 0.82% | 0.92% | 1.42% | 0.62% | 0.00% | 0.00% | 0.00% |
Frequently Asked Questions
NTSX and IEI have a correlation of 0.37, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
NTSX has higher volatility (5.05%) compared to IEI (0.98%). In terms of maximum drawdown, NTSX dropped -31.34% vs IEI's -14.60%.
On 5-year performance, NTSX leads with 9.23% vs 0.21% for IEI. On fees, IEI is cheaper at 0.15% per year. On volatility, IEI has been the lower-risk option at 0.98%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 5-year period, NTSX has performed better with a 9.23% return vs 0.21%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
IEI is cheaper with a 0.15% expense ratio, compared with 0.20% for NTSX.
IEI has the higher dividend yield at 3.64%, compared with 1.09% for NTSX.
NTSX is categorized as Diversified Portfolio, while IEI is Government Bonds. They also come from different issuers: WisdomTree and iShares. Their fees differ too: 0.20% for NTSX and 0.15% for IEI.
NTSX currently has the higher Sharpe Ratio (1.72 vs 1.00), meaning it's delivered slightly more return per unit of risk over the trailing 12 months. However, this ranking shifts over time - use the Risk/Return Score above for a more comprehensive view that combines Sharpe, Sortino, and other measures used by quantitative funds.
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