ZROZ vs. SPTL

Last updated Apr 1, 2026

Compare and contrast key facts about PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) and SPDR Portfolio Long Term Treasury ETF (SPTL).

ZROZ and SPTL are both exchange-traded funds (ETFs), meaning they are traded on stock exchanges and can be bought and sold throughout the day. ZROZ is a passively managed fund by PIMCO that tracks the performance of the BofA Merrill Lynch Long Treasury Principal STRIPS Index. It was launched on Oct 30, 2009. SPTL is a passively managed fund by State Street that tracks the performance of the Bloomberg Long U.S. Treasury Index. It was launched on May 23, 2007. Both ZROZ and SPTL are passive ETFs, meaning that they are not actively managed but aim to replicate the performance of the underlying index as closely as possible.

Performance

ZROZ vs. SPTL - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) and SPDR Portfolio Long Term Treasury ETF (SPTL). The values are adjusted to include any dividend payments, if applicable.

ZROZ vs. SPTL - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ZROZ PIMCO 25+ Year Zero Coupon US Treasury Index Fund	-0.37%	-1.84%	-16.18%	1.19%	-41.28%	-5.22%	24.57%	21.22%	-5.43%	14.77%
SPTL SPDR Portfolio Long Term Treasury ETF	0.01%	5.28%	-6.23%	3.30%	-29.44%	-4.99%	18.07%	13.74%	-1.57%	9.01%

Returns By Period

In the year-to-date period, ZROZ achieves a -0.37% return, which is significantly lower than SPTL's 0.01% return. Over the past 10 years, ZROZ has underperformed SPTL with an annualized return of -3.82%, while SPTL has yielded a comparatively higher -0.87% annualized return.

ZROZ

• 1D: -0.61%
• 1M: -6.35%
• YTD: -0.37%
• 6M: -3.49%
• 1Y: -6.32%
• 3Y*: -8.90%
• 5Y*: -11.00%
• 10Y*: -3.82%

SPTL

• 1D: 0.04%
• 1M: -3.93%
• YTD: 0.01%
• 6M: -0.43%
• 1Y: 0.50%
• 3Y*: -1.55%
• 5Y*: -4.88%
• 10Y*: -0.87%

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

ZROZ vs. SPTL - Expense Ratio Comparison

ZROZ has a 0.15% expense ratio, which is higher than SPTL's 0.03% 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%.

ZROZ

PIMCO 25+ Year Zero Coupon US Treasury Index Fund

SPTL

SPDR Portfolio Long Term Treasury ETF

Return for Risk

ZROZ vs. SPTL — Risk / Return Rank

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

ZROZ

ZROZ Risk / Return Rank: 7
ZROZ Sharpe Ratio Rank: 6
ZROZ Sortino Ratio Rank: 6
ZROZ Omega Ratio Rank: 6
ZROZ Calmar Ratio Rank: 7
ZROZ Martin Ratio Rank: 8

SPTL

SPTL Risk / Return Rank: 14
SPTL Sharpe Ratio Rank: 13
SPTL Sortino Ratio Rank: 12
SPTL Omega Ratio Rank: 12
SPTL Calmar Ratio Rank: 15
SPTL Martin Ratio Rank: 15

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.

ZROZ vs. SPTL - 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 SPDR Portfolio Long Term Treasury ETF (SPTL). 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	SPTL	Difference
Sharpe ratio Return per unit of total volatility	-0.33	0.05	-0.38
Sortino ratio Return per unit of downside risk	-0.34	0.14	-0.47
Omega ratio Gain probability vs. loss probability	0.96	1.02	-0.06
Calmar ratio Return relative to maximum drawdown	-0.30	0.16	-0.46
Martin ratio Return relative to average drawdown	-0.53	0.34	-0.87
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

ZROZ vs. SPTL - Sharpe Ratio Comparison

The current ZROZ Sharpe Ratio is -0.33, which is lower than the SPTL Sharpe Ratio of 0.05. The chart below compares the historical Sharpe Ratios of ZROZ and SPTL, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	ZROZ	SPTL	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	-0.33	0.05	-0.38
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	-0.46	-0.34	-0.13
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	-0.17	-0.06	-0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.09	0.24	-0.15

Correlation

The correlation between ZROZ and SPTL is 0.96, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

ZROZ vs. SPTL - Dividend Comparison

ZROZ's dividend yield for the trailing twelve months is around 4.98%, more than SPTL's 4.15% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
ZROZ PIMCO 25+ Year Zero Coupon US Treasury Index Fund	4.98%	4.96%	4.58%	3.52%	2.76%	1.60%	1.68%	2.22%	2.06%	2.53%	3.00%	2.98%
SPTL SPDR Portfolio Long Term Treasury ETF	4.15%	4.12%	4.03%	3.24%	2.75%	1.68%	1.71%	2.45%	2.69%	2.53%	2.56%	2.60%

Drawdowns

ZROZ vs. SPTL - Drawdown Comparison

The maximum ZROZ drawdown since its inception was -62.93%, which is greater than SPTL's maximum drawdown of -46.20%. Use the drawdown chart below to compare losses from any high point for ZROZ and SPTL.

Drawdown Indicators

	ZROZ	SPTL	Difference
Max Drawdown Largest peak-to-trough decline	-62.93%	-46.20%	-16.73%
Max Drawdown (1Y) Largest decline over 1 year	-15.63%	-8.44%	-7.19%
Max Drawdown (5Y) Largest decline over 5 years	-57.98%	-41.02%	-16.96%
Max Drawdown (10Y) Largest decline over 10 years	-62.93%	-46.20%	-16.73%
Current Drawdown Current decline from peak	-59.65%	-36.62%	-23.03%
Average Drawdown Average peak-to-trough decline	-23.66%	-14.03%	-9.63%
Ulcer Index Depth and duration of drawdowns from previous peaks	8.99%	3.84%	+5.15%

Volatility

ZROZ vs. SPTL - Volatility Comparison

PIMCO 25+ Year Zero Coupon US Treasury Index Fund (ZROZ) has a higher volatility of 5.79% compared to SPDR Portfolio Long Term Treasury ETF (SPTL) at 3.50%. This indicates that ZROZ's price experiences larger fluctuations and is considered to be riskier than SPTL based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ZROZ	SPTL	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.79%	3.50%	+2.29%
Volatility (6M) Calculated over the trailing 6-month period	10.85%	6.01%	+4.84%
Volatility (1Y) Calculated over the trailing 1-year period	19.16%	10.34%	+8.82%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.93%	14.65%	+9.28%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	22.09%	13.98%	+8.11%