LFAO vs. SPTB

Last updated Jun 23, 2026

LFAO (LifeX 2055 Longevity Income ETF) and SPTB (State Street SPDR Portfolio Treasury ETF) are both Government Bonds funds. LFAO is actively managed, while SPTB is passively managed. Over the past year, LFAO returned 3.55% vs 3.31% for SPTB. With a 0.96 correlation, they move nearly in lockstep. LFAO charges 0.25%/yr vs 0.03%/yr for SPTB.

Performance

LFAO vs. SPTB - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in LifeX 2055 Longevity Income ETF (LFAO) and State Street SPDR Portfolio Treasury ETF (SPTB). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

As of year-to-date, both investments have demonstrated similar returns, with LFAO at 0.08% and SPTB at 0.08%.

LFAO

• 1D: -0.52%
• 1M: 1.40%
• YTD: 0.08%
• 6M: 0.11%
• 1Y: 3.55%
• 3Y*: —
• 5Y*: —
• 10Y*: —

SPTB

• 1D: -0.24%
• 1M: 0.42%
• YTD: 0.08%
• 6M: 0.14%
• 1Y: 3.31%
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

LFAO vs. SPTB - Yearly Performance Comparison

	2026 (YTD)	2025	2024
LFAO LifeX 2055 Longevity Income ETF	0.08%	5.65%	-8.36%
SPTB State Street SPDR Portfolio Treasury ETF	0.08%	6.14%	-3.75%

Correlation

The correlation between LFAO and SPTB is 0.96 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.96
Correlation (All Time) Calculated using the full available price history since Sep 16, 2024	0.96

The correlation between LFAO and SPTB has been stable across timeframes, ranging from 0.96 to 0.96 - a consistent structural relationship.

Return for Risk

LFAO vs. SPTB — Risk / Return Rank

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

LFAO

LFAO Risk / Return Rank: 15
LFAO Sharpe Ratio Rank: 16
LFAO Sortino Ratio Rank: 15
LFAO Omega Ratio Rank: 14
LFAO Calmar Ratio Rank: 15
LFAO Martin Ratio Rank: 16

SPTB

SPTB Risk / Return Rank: 25
SPTB Sharpe Ratio Rank: 27
SPTB Sortino Ratio Rank: 27
SPTB Omega Ratio Rank: 24
SPTB Calmar Ratio Rank: 24
SPTB Martin Ratio Rank: 24

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.

LFAO vs. SPTB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for LifeX 2055 Longevity Income ETF (LFAO) and State Street SPDR Portfolio Treasury ETF (SPTB). 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.

	LFAO	SPTB	Difference
Sharpe ratio: Return per unit of total volatility	0.52	0.93	-0.42
Sortino ratio: Return per unit of downside risk	0.80	1.42	-0.62
Omega ratio: Gain probability vs. loss probability	1.09	1.16	-0.07
Calmar ratio: Return relative to maximum drawdown	0.61	1.14	-0.54
Martin ratio: Return relative to average drawdown	1.58	3.15	-1.58

LFAO vs. SPTB - Sharpe Ratio Comparison

The current LFAO Sharpe Ratio is 0.52, which is lower than the SPTB Sharpe Ratio of 0.93. The chart below compares the historical Sharpe Ratios of LFAO and SPTB, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

LFAO vs. SPTB - Drawdown Comparison

The maximum LFAO drawdown since its inception was -10.12%, which is greater than SPTB's maximum drawdown of -4.96%. Use the drawdown chart below to compare losses from any high point for LFAO and SPTB.

Drawdown Indicators

	LFAO	SPTB	Difference
Max Drawdown Largest peak-to-trough decline	-10.12%	-4.96%	-5.16%
Max Drawdown (1Y) Largest decline over 1 year	-5.86%	-2.90%	-2.96%
Current Drawdown Current decline from peak	-3.18%	-1.80%	-1.38%
Average Drawdown Average peak-to-trough decline	-4.54%	-1.33%	-3.21%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.26%	1.05%	+1.21%

Volatility

LFAO vs. SPTB - Volatility Comparison

LifeX 2055 Longevity Income ETF (LFAO) has a higher volatility of 1.72% compared to State Street SPDR Portfolio Treasury ETF (SPTB) at 0.95%. This indicates that LFAO's price experiences larger fluctuations and is considered to be riskier than SPTB based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	LFAO	SPTB	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.72%	0.95%	+0.77%
Volatility (6M) Calculated over the trailing 6-month period	5.04%	2.54%	+2.50%
Volatility (1Y) Calculated over the trailing 1-year period	6.87%	3.57%	+3.30%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.05%	4.40%	+3.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	8.05%	4.40%	+3.65%

LFAO vs. SPTB - Expense Ratio Comparison

LFAO has a 0.25% expense ratio, which is higher than SPTB'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%.

Dividends

LFAO vs. SPTB - Dividend Comparison

LFAO's dividend yield for the trailing twelve months is around 10.95%, more than SPTB's 4.19% yield.

Position	TTM	2025	2024
LFAO LifeX 2055 Longevity Income ETF	10.95%	14.33%	1.64%
SPTB State Street SPDR Portfolio Treasury ETF	4.19%	4.23%	2.76%

Frequently Asked Questions

Can I hold both LFAO and SPTB in my portfolio?

With a correlation of 0.96, LFAO and SPTB move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, LFAO or SPTB?

LFAO has higher volatility (1.72%) compared to SPTB (0.95%). In terms of maximum drawdown, LFAO dropped -10.12% vs SPTB's -4.96%.

Which ETF is better, LFAO or SPTB?

On 1-year performance, LFAO leads with 3.55% vs 3.31% for SPTB. On fees, SPTB is cheaper at 0.03% per year. On volatility, SPTB has been the lower-risk option at 0.95%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, LFAO or SPTB?

Over the 1-year period, LFAO has performed better with a 3.55% return vs 3.31%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, LFAO or SPTB?

SPTB is cheaper with a 0.03% expense ratio, compared with 0.25% for LFAO.

Which ETF pays a higher dividend yield, LFAO or SPTB?

LFAO has the higher dividend yield at 10.95%, compared with 4.19% for SPTB.

What is the main difference between LFAO and SPTB?

They also come from different issuers: Stone Ridge and State Street. Their fees differ too: 0.25% for LFAO and 0.03% for SPTB.

Which has better risk-adjusted returns?

SPTB currently has the higher Sharpe Ratio (0.93 vs 0.52), 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.