ZROZ vs. RFIX
ZROZ (PIMCO 25+ Year Zero Coupon US Treasury Index Fund) and RFIX (Simplify Bond Bull ETF) are both exchange-traded funds - ZROZ is a Government Bonds fund tracking the ICE BofA Long U.S. Treasury Principal STRIPS Index, while RFIX is a Nontraditional Bonds fund actively managed by Simplify. ZROZ is passively managed, while RFIX is actively managed. Over the past year, ZROZ returned 3.89% vs -14.76% for RFIX. A 0.78 correlation means they provide meaningful diversification when combined. ZROZ charges 0.15%/yr vs 0.50%/yr for RFIX.
Performance
ZROZ vs. RFIX - Performance Comparison
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Returns By Period
In the year-to-date period, ZROZ achieves a -1.07% return, which is significantly lower than RFIX's 7.97% return.
ZROZ
- 1D
- -0.48%
- 1M
- 1.55%
- YTD
- -1.07%
- 6M
- -4.36%
- 1Y
- 3.89%
- 3Y*
- -7.39%
- 5Y*
- -11.62%
- 10Y*
- -4.15%
RFIX
- 1D
- 0.99%
- 1M
- -2.56%
- YTD
- 7.97%
- 6M
- -2.48%
- 1Y
- -14.76%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
ZROZ vs. RFIX - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | |
|---|---|---|---|
ZROZ PIMCO 25+ Year Zero Coupon US Treasury Index Fund | -1.07% | -1.84% | -9.26% |
RFIX Simplify Bond Bull ETF | 7.97% | -28.43% | -12.32% |
Correlation
The correlation between ZROZ and RFIX is 0.71, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.
| Correlation | |
|---|---|
Correlation (1Y) Calculated over the trailing 1-year period | 0.71 |
Correlation (All Time) Calculated using the full available price history since Dec 11, 2024 | 0.78 |
The correlation between ZROZ and RFIX has been stable across timeframes, ranging from 0.71 to 0.78 - a consistent structural relationship.
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Return for Risk
ZROZ vs. RFIX — Risk / Return Rank
ZROZ
RFIX
ZROZ vs. RFIX - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) and Simplify Bond Bull ETF (RFIX). 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.
| ZROZ | RFIX | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | +0.74 | ||
| Sortino ratioReturn per unit of downside risk | +1.01 | ||
| Omega ratioGain probability vs. loss probability | 1.05 | 0.94 | +0.11 |
| Calmar ratioReturn relative to maximum drawdown | 0.28 | -0.58 | +0.86 |
| Martin ratioReturn relative to average drawdown | 0.64 | -1.01 | +1.64 |
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month. | |||
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Sharpe Ratios by Period
| ZROZ | RFIX | Difference | |
|---|---|---|---|
Sharpe Ratio (1Y)Calculated over the trailing 1-year period | 0.24 | -0.50 | +0.74 |
Sharpe Ratio (5Y)Calculated over the trailing 5-year period | -0.49 | — | — |
Sharpe Ratio (10Y)Calculated over the trailing 10-year period | -0.19 | — | — |
Sharpe Ratio (All Time)Calculated using the full available price history | 0.09 | -0.76 | +0.85 |
Drawdowns
ZROZ vs. RFIX - Drawdown Comparison
The maximum ZROZ drawdown since its inception was -62.93%, which is greater than RFIX's maximum drawdown of -38.79%. Use the drawdown chart below to compare losses from any high point for ZROZ and RFIX.
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Drawdown Indicators
| ZROZ | RFIX | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -62.93% | -38.79% | -24.14% |
Max Drawdown (1Y)Largest decline over 1 year | -14.02% | -25.48% | +11.46% |
Max Drawdown (3Y)Largest decline over 3 years | -28.62% | — | — |
Max Drawdown (5Y)Largest decline over 5 years | -57.98% | — | — |
Max Drawdown (10Y)Largest decline over 10 years | -62.93% | — | — |
Current DrawdownCurrent decline from peak | -59.93% | -32.25% | -27.68% |
Average DrawdownAverage peak-to-trough decline | -24.04% | -24.11% | +0.07% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 6.12% | 14.70% | -8.58% |
Volatility
ZROZ vs. RFIX - Volatility Comparison
The current volatility for PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) is 4.46%, while Simplify Bond Bull ETF (RFIX) has a volatility of 5.47%. This indicates that ZROZ experiences smaller price fluctuations and is considered to be less risky than RFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| ZROZ | RFIX | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 4.46% | 5.47% | -1.01% |
Volatility (6M)Calculated over the trailing 6-month period | 10.54% | 20.35% | -9.81% |
Volatility (1Y)Calculated over the trailing 1-year period | 16.25% | 29.75% | -13.50% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 23.90% | 30.90% | -7.00% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 22.06% | 30.90% | -8.84% |
ZROZ vs. RFIX - Expense Ratio Comparison
ZROZ has a 0.15% expense ratio, which is lower than RFIX's 0.50% expense ratio.
Dividends
ZROZ vs. RFIX - Dividend Comparison
ZROZ's dividend yield for the trailing twelve months is around 5.15%, more than RFIX's 4.63% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
RFIX Simplify Bond Bull ETF | 4.63% | 5.07% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% | 0.00% |
ZROZ PIMCO 25+ Year Zero Coupon US Treasury Index Fund | 5.15% | 4.96% | 4.58% | 3.52% | 2.76% | 1.60% | 1.68% | 2.22% | 2.06% | 2.53% | 3.00% | 2.98% |
Frequently Asked Questions
ZROZ and RFIX have a correlation of 0.71, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RFIX has higher volatility (5.47%) compared to ZROZ (4.46%). In terms of maximum drawdown, ZROZ dropped -62.93% vs RFIX's -38.79%.
On 1-year performance, ZROZ leads with 3.89% vs -14.76% for RFIX. On fees, ZROZ is cheaper at 0.15% per year. On volatility, ZROZ has been the lower-risk option at 4.46%. The better choice depends on whether you care most about return, fees, risk, or income.
Over the 1-year period, ZROZ has performed better with a 3.89% return vs -14.76%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.
ZROZ is cheaper with a 0.15% expense ratio, compared with 0.50% for RFIX.
ZROZ has the higher dividend yield at 5.15%, compared with 4.63% for RFIX.
ZROZ is categorized as Government Bonds, while RFIX is Nontraditional Bonds. They also come from different issuers: PIMCO and Simplify. Their fees differ too: 0.15% for ZROZ and 0.50% for RFIX.
ZROZ currently has the higher Sharpe Ratio (0.24 vs -0.50), 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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