STPZ vs. RBIL

Last updated Jun 4, 2026

STPZ (PIMCO 1-5 Year US TIPS Index ETF) and RBIL (F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF) are both Inflation-Protected Bonds funds - STPZ tracks the ICE BofA US Inflation-Linked Treasury (1-5 Y) while RBIL tracks the Bloomberg US Ultrashort TIPS 1-13 Months Index. Both are passively managed. Over the past year, STPZ returned 4.51% vs 4.57% for RBIL. At a 0.29 correlation, their price movements are largely independent. STPZ charges 0.20%/yr vs 0.17%/yr for RBIL.

Performance

STPZ vs. RBIL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO 1-5 Year US TIPS Index ETF (STPZ) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, STPZ achieves a 1.79% return, which is significantly lower than RBIL's 2.70% return.

STPZ

• 1D: -0.00%
• 1M: -0.09%
• YTD: 1.79%
• 6M: 1.77%
• 1Y: 4.51%
• 3Y*: 5.03%
• 5Y*: 2.90%
• 10Y*: 2.89%

RBIL

• 1D: 0.06%
• 1M: 0.38%
• YTD: 2.70%
• 6M: 2.79%
• 1Y: 4.57%
• 3Y*: —
• 5Y*: —
• 10Y*: —

*Multi-year figures are annualized to reflect compound growth (CAGR)

STPZ vs. RBIL - Yearly Performance Comparison

	2026 (YTD)	2025
STPZ PIMCO 1-5 Year US TIPS Index ETF	1.79%	4.46%
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	2.70%	2.91%

Correlation

The correlation between STPZ and RBIL is 0.25, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.25
Correlation (All Time) Calculated using the full available price history since Feb 26, 2025	0.29

Return for Risk

STPZ vs. RBIL — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.

STPZ

STPZ Risk / Return Rank: 82
STPZ Sharpe Ratio Rank: 76
STPZ Sortino Ratio Rank: 86
STPZ Omega Ratio Rank: 80
STPZ Calmar Ratio Rank: 86
STPZ Martin Ratio Rank: 81

RBIL

RBIL Risk / Return Rank: 98
RBIL Sharpe Ratio Rank: 97
RBIL Sortino Ratio Rank: 98
RBIL Omega Ratio Rank: 98
RBIL Calmar Ratio Rank: 98
RBIL Martin Ratio Rank: 98

The rank (0–100) shows how this investment's returns compare to the risk taken. Higher = better. Based on the past 12 months of data, combining Sharpe, Sortino, and other metrics used by quantitative funds and institutional investors.

STPZ vs. RBIL - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for PIMCO 1-5 Year US TIPS Index ETF (STPZ) and F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL). 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.

	STPZ	RBIL	Difference
Sharpe ratio: Return per unit of total volatility	2.49	5.01	-2.53
Sortino ratio: Return per unit of downside risk	3.94	7.92	-3.98
Omega ratio: Gain probability vs. loss probability	1.49	2.39	-0.90
Calmar ratio: Return relative to maximum drawdown	4.87	17.00	-12.13
Martin ratio: Return relative to average drawdown	16.28	70.66	-54.37
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

STPZ vs. RBIL - Sharpe Ratio Comparison

The current STPZ Sharpe Ratio is 2.49, which is lower than the RBIL Sharpe Ratio of 5.01. The chart below compares the historical Sharpe Ratios of STPZ and RBIL, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	STPZ	RBIL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.49	5.01	-2.53
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.89	—	—
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.97	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.90	4.28	-3.37

Drawdowns

STPZ vs. RBIL - Drawdown Comparison

The maximum STPZ drawdown since its inception was -6.77%, which is greater than RBIL's maximum drawdown of -0.50%. Use the drawdown chart below to compare losses from any high point for STPZ and RBIL.

Drawdown Indicators

	STPZ	RBIL	Difference
Max Drawdown Largest peak-to-trough decline	-6.77%	-0.50%	-6.27%
Max Drawdown (1Y) Largest decline over 1 year	-0.93%	-0.27%	-0.66%
Max Drawdown (3Y) Largest decline over 3 years	-1.35%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-6.70%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-6.77%	—	—
Current Drawdown Current decline from peak	-0.11%	0.00%	-0.11%
Average Drawdown Average peak-to-trough decline	-1.31%	-0.06%	-1.25%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.28%	0.07%	+0.21%

Volatility

STPZ vs. RBIL - Volatility Comparison

PIMCO 1-5 Year US TIPS Index ETF (STPZ) has a higher volatility of 0.46% compared to F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF (RBIL) at 0.30%. This indicates that STPZ's price experiences larger fluctuations and is considered to be riskier than RBIL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	STPZ	RBIL	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.46%	0.30%	+0.16%
Volatility (6M) Calculated over the trailing 6-month period	1.20%	0.79%	+0.41%
Volatility (1Y) Calculated over the trailing 1-year period	1.83%	0.92%	+0.91%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.29%	1.05%	+2.24%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	2.98%	1.05%	+1.93%

STPZ vs. RBIL - Expense Ratio Comparison

STPZ has a 0.20% expense ratio, which is higher than RBIL's 0.17% 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

STPZ vs. RBIL - Dividend Comparison

STPZ's dividend yield for the trailing twelve months is around 4.10%, less than RBIL's 4.60% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
RBIL F/m Ultrashort Treasury Inflation-Protected Security (TIPS) ETF	4.60%	3.65%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%
STPZ PIMCO 1-5 Year US TIPS Index ETF	4.10%	3.65%	1.97%	1.63%	5.88%	3.65%	1.86%	1.76%	2.23%	1.51%	0.65%	0.49%

Frequently Asked Questions

Can I hold both STPZ and RBIL in my portfolio?

STPZ and RBIL have a correlation of 0.25, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, STPZ or RBIL?

STPZ has higher volatility (0.46%) compared to RBIL (0.30%). In terms of maximum drawdown, STPZ dropped -6.77% vs RBIL's -0.50%.

Which ETF is better, STPZ or RBIL?

On 1-year performance, RBIL leads with 4.57% vs 4.51% for STPZ. On fees, RBIL is cheaper at 0.17% per year. On volatility, RBIL has been the lower-risk option at 0.30%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, STPZ or RBIL?

Over the 1-year period, RBIL has performed better with a 4.57% return vs 4.51%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, STPZ or RBIL?

RBIL is cheaper with a 0.17% expense ratio, compared with 0.20% for STPZ.

Which ETF pays a higher dividend yield, STPZ or RBIL?

RBIL has the higher dividend yield at 4.60%, compared with 4.10% for STPZ.

What is the main difference between STPZ and RBIL?

STPZ tracks ICE BofA US Inflation-Linked Treasury (1-5 Y), while RBIL tracks Bloomberg US Ultrashort TIPS 1-13 Months Index. They also come from different issuers: PIMCO and F/m. Their fees differ too: 0.20% for STPZ and 0.17% for RBIL.

Which has better risk-adjusted returns?

RBIL currently has the higher Sharpe Ratio (5.01 vs 2.49), 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.