LFDR vs. SPTB

Last updated Aug 1, 2026

LFDR (LifeX Durable Income ETF) and SPTB (State Street SPDR Portfolio Treasury ETF) are both Government Bonds funds. LFDR is actively managed, while SPTB is passively managed. Over the past year, LFDR returned -1.91% vs 1.09% for SPTB. Their correlation of 0.94 means they have usually moved in the same direction. LFDR charges 0.25%/yr vs 0.03%/yr for SPTB.

Performance

LFDR vs. SPTB - Performance Comparison

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

Returns By Period

In the year-to-date period, LFDR achieves a -3.22% return, which is significantly lower than SPTB's -0.64% return.

LFDR

• 1D: -0.73%
• 1M: -3.47%
• 6M: -3.17%
• YTD: -3.22%
• 1Y: -1.91%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: -0.13%

SPTB

• 1D: -0.22%
• 1M: -1.20%
• 6M: -0.75%
• YTD: -0.64%
• 1Y: 1.09%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.46%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
LFDR LifeX Durable Income ETF	$1.83K	$1.96K	$2.51K
SPTB State Street SPDR Portfolio Treasury ETF	$554.84K	$766.31K	$2.41M

LFDR vs. SPTB - Yearly Performance Comparison

	2026 (YTD)	2025	2024
LFDR LifeX Durable Income ETF	-3.22%	4.82%	-1.64%
SPTB State Street SPDR Portfolio Treasury ETF	-0.64%	6.14%	-0.64%

Correlation

The correlation between LFDR and SPTB is 0.94, meaning they have usually moved in the same direction, including during past declines.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.94
Correlation (All Time) Calculated using the full available price history since Dec 16, 2024	0.94

The correlation between LFDR and SPTB has been stable across timeframes, ranging from 0.94 to 0.94 - a consistent structural relationship.

Return for Risk

LFDR vs. SPTB — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

LFDR

LFDR Risk / Return Rank: 9
LFDR Sharpe Ratio Rank: 10
LFDR Sortino Ratio Rank: 9
LFDR Omega Ratio Rank: 9
LFDR Calmar Ratio Rank: 10
LFDR Martin Ratio Rank: 9

SPTB

SPTB Risk / Return Rank: 23
SPTB Sharpe Ratio Rank: 25
SPTB Sortino Ratio Rank: 23
SPTB Omega Ratio Rank: 22
SPTB Calmar Ratio Rank: 23
SPTB Martin Ratio Rank: 23

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

LFDR vs. SPTB - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for LifeX Durable Income ETF (LFDR) 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.

	LFDR	SPTB	Difference
Sharpe ratio: Return per unit of total volatility	-0.08	0.57	-0.66
Sortino ratio: Return per unit of downside risk	-0.06	0.87	-0.92
Omega ratio: Gain probability vs. loss probability	0.99	1.10	-0.11
Calmar ratio: Return relative to maximum drawdown	-0.10	0.70	-0.79
Martin ratio: Return relative to average drawdown	-0.22	1.66	-1.88

LFDR vs. SPTB - Sharpe Ratio Comparison

The current LFDR Sharpe Ratio is -0.08, which is lower than the SPTB Sharpe Ratio of 0.57. The chart below compares the historical Sharpe Ratios of LFDR 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

LFDR vs. SPTB - Drawdown Comparison

The maximum LFDR drawdown since its inception was -7.77%, which is greater than SPTB's maximum drawdown of -4.96%. Use the drawdown chart below to compare losses from any high point for LFDR and SPTB.

Drawdown Indicators

	LFDR	SPTB	Difference
Max Drawdown Largest peak-to-trough decline	-7.77%	-4.96%	-2.81%
Max Drawdown (1Y) Largest decline over 1 year	-6.84%	-2.90%	-3.94%
Current Drawdown Current decline from peak	-6.84%	-2.50%	-4.34%
Average Drawdown Average peak-to-trough decline	-3.07%	-1.36%	-1.71%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.06%	1.21%	+1.85%

Volatility

LFDR vs. SPTB - Volatility Comparison

LifeX Durable Income ETF (LFDR) has a higher volatility of 2.14% compared to State Street SPDR Portfolio Treasury ETF (SPTB) at 0.94%. This indicates that LFDR'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

	LFDR	SPTB	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.14%	0.94%	+1.20%
Volatility (6M) Calculated over the trailing 6-month period	6.06%	2.69%	+3.37%
Volatility (1Y) Calculated over the trailing 1-year period	8.09%	3.52%	+4.57%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	9.47%	4.36%	+5.11%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	9.47%	4.36%	+5.11%

LFDR vs. SPTB - Expense Ratio Comparison

LFDR 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

LFDR vs. SPTB - Dividend Comparison

LFDR's dividend yield for the trailing twelve months is around 8.50%, more than SPTB's 4.22% yield.

Position	TTM	2025	2024
LFDR LifeX Durable Income ETF	8.50%	13.10%	0.00%
SPTB State Street SPDR Portfolio Treasury ETF	3.85%	4.23%	2.76%

Frequently Asked Questions

Can I hold both LFDR and SPTB in my portfolio?

With a correlation of 0.94, LFDR 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, LFDR or SPTB?

LFDR has higher volatility (2.14%) compared to SPTB (0.94%). In terms of maximum drawdown, LFDR dropped -7.77% vs SPTB's -4.96%.

Which ETF is better, LFDR or SPTB?

On 1-year performance, SPTB leads with 1.09% vs -1.91% for LFDR. On fees, SPTB is cheaper at 0.03% per year. On volatility, SPTB has been the lower-risk option at 0.94%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, LFDR or SPTB?

Over the 1-year period, SPTB has performed better with a 1.09% return vs -1.91%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, LFDR or SPTB?

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

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

LFDR has the higher dividend yield at 8.50%, compared with 3.85% for SPTB.

What is the main difference between LFDR and SPTB?

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

Which has better risk-adjusted returns?

SPTB currently has the higher Sharpe Ratio (0.57 vs -0.08), 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.