RFIX vs. ZROZ
RFIX (Simplify Bond Bull ETF) and ZROZ (PIMCO 25+ Year Zero Coupon US Treasury Index Fund) are both exchange-traded funds - RFIX is a Nontraditional Bonds fund actively managed by Simplify, while ZROZ is a Government Bonds fund tracking the ICE BofA Long U.S. Treasury Principal STRIPS Index. RFIX is actively managed, while ZROZ is passively managed. Over the past year, RFIX returned -15.77% vs -7.54% for ZROZ. Their 0.76 correlation means they have sometimes moved together and sometimes differently. RFIX charges 0.50%/yr vs 0.15%/yr for ZROZ.
Performance
RFIX vs. ZROZ - Performance Comparison
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Returns By Period
In the year-to-date period, RFIX achieves a 4.85% return, which is significantly higher than ZROZ's -7.23% return.
RFIX
- 1D
- 0.12%
- 1M
- -2.47%
- 6M
- 5.09%
- YTD
- 4.85%
- 1Y
- -15.77%
- 3Y*
- —
- 5Y*
- —
- 10Y*
- —
- ALL TIME*
- -22.51%
ZROZ
- 1D
- -1.24%
- 1M
- -7.20%
- 6M
- -6.41%
- YTD
- -7.23%
- 1Y
- -7.54%
- 3Y*
- -8.06%
- 5Y*
- -14.47%
- 10Y*
- -5.40%
- ALL TIME*
- 1.69%
Liquidity Comparison
| Position | Avg. Volume Value (2W) | Avg. Volume Value (1M) | Avg. Volume Value (3M) |
|---|---|---|---|
| $6.74M | $8.71M | $16.93M | |
| $41.31M | $45.82M | $40.38M |
RFIX vs. ZROZ - Yearly Performance Comparison
| 2026 (YTD) | 2025 | 2024 | |
|---|---|---|---|
RFIX Simplify Bond Bull ETF | 4.85% | -28.43% | -12.22% |
ZROZ PIMCO 25+ Year Zero Coupon US Treasury Index Fund | -7.23% | -1.84% | -10.08% |
Correlation
The correlation between RFIX and ZROZ is 0.66, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.
| Correlation | |
|---|---|
Correlation (1Y) Focuses on recent behavior, but can change the most. | 0.66 |
Correlation (All Time) Calculated using the full available price history since Dec 10, 2024 | 0.76 |
The correlation between RFIX and ZROZ shifts across timeframes, from 0.66 (1 year) to 0.76 (all time), reflecting how their relationship changes across market environments.
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Return for Risk
RFIX vs. ZROZ — Risk / Return Rank
RFIX
ZROZ
RFIX vs. ZROZ - Risk-Adjusted Trends Comparison
This table presents a comparison of risk-adjusted performance metrics for Simplify Bond Bull ETF (RFIX) and PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ). 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.
| RFIX | ZROZ | Difference | |
|---|---|---|---|
| Sharpe ratioReturn per unit of total volatility | -0.12 | ||
| Sortino ratioReturn per unit of downside risk | -0.11 | ||
| Omega ratioGain probability vs. loss probability | 0.94 | 0.95 | -0.01 |
| Calmar ratioReturn relative to maximum drawdown | -0.68 | -0.39 | -0.28 |
| Martin ratioReturn relative to average drawdown | -1.20 | -0.82 | -0.38 |
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Drawdowns
RFIX vs. ZROZ - Drawdown Comparison
The maximum RFIX drawdown since its inception was -38.79%, smaller than the maximum ZROZ drawdown of -62.93%. Use the drawdown chart below to compare losses from any high point for RFIX and ZROZ.
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Drawdown Indicators
| RFIX | ZROZ | Difference | |
|---|---|---|---|
Max DrawdownLargest peak-to-trough decline | -38.79% | -62.93% | +24.14% |
Max Drawdown (1Y)Largest decline over 1 year | -21.63% | -14.90% | -6.73% |
Max Drawdown (3Y)Largest decline over 3 years | — | -26.42% | — |
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 | -34.21% | -62.42% | +28.21% |
Average DrawdownAverage peak-to-trough decline | -24.89% | -24.38% | -0.51% |
Ulcer IndexDepth and duration of drawdowns from previous peaks | 12.18% | 7.18% | +5.00% |
Volatility
RFIX vs. ZROZ - Volatility Comparison
Simplify Bond Bull ETF (RFIX) has a higher volatility of 6.23% compared to PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) at 4.20%. This indicates that RFIX's price experiences larger fluctuations and is considered to be riskier than ZROZ based on this measure. The chart below showcases a comparison of their rolling one-month volatility.
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Volatility by Period
| RFIX | ZROZ | Difference | |
|---|---|---|---|
Volatility (1M)Calculated over the trailing 1-month period | 6.23% | 4.20% | +2.03% |
Volatility (6M)Calculated over the trailing 6-month period | 20.46% | 11.11% | +9.35% |
Volatility (1Y)Calculated over the trailing 1-year period | 29.41% | 15.45% | +13.96% |
Volatility (5Y)Calculated over the trailing 5-year period, annualized | 30.63% | 23.76% | +6.87% |
Volatility (10Y)Calculated over the trailing 10-year period, annualized | 30.63% | 21.96% | +8.67% |
RFIX vs. ZROZ - Expense Ratio Comparison
RFIX has a 0.50% expense ratio, which is higher than ZROZ's 0.15% expense ratio.
Dividends
RFIX vs. ZROZ - Dividend Comparison
RFIX's dividend yield for the trailing twelve months is around 4.36%, less than ZROZ's 5.59% yield.
| Position | TTM | 2025 | 2024 | 2023 | 2022 | 2021 | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
RFIX Simplify Bond Bull ETF | 4.36% | 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 | 5.59% | 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
RFIX and ZROZ have a correlation of 0.66, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.
RFIX has higher volatility (6.23%) compared to ZROZ (4.20%). In terms of maximum drawdown, RFIX dropped -38.79% vs ZROZ's -62.93%.
On 1-year performance, ZROZ leads with -7.54% vs -15.77% for RFIX. On fees, ZROZ is cheaper at 0.15% per year. On volatility, ZROZ has been the lower-risk option at 4.20%. 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 -7.54% return vs -15.77%. 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 5.59%, compared with 4.36% for RFIX.
RFIX is categorized as Nontraditional Bonds, while ZROZ is Government Bonds. They also come from different issuers: Simplify and PIMCO. Their fees differ too: 0.50% for RFIX and 0.15% for ZROZ.
ZROZ currently has the higher Sharpe Ratio (-0.38 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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