LFAI vs. LDDR

Last updated Aug 1, 2026

LFAI (LifeX 2050 Longevity Income ETF) and LDDR (LifeX 2035 Income Bucket ETF) are both exchange-traded funds - LFAI is a Government Bonds fund actively managed by Stone Ridge, while LDDR is a Target Retirement Date fund actively managed by Stone Ridge. Both are actively managed. Over the past year, LFAI returned -0.64% vs 1.29% for LDDR. Their correlation of 0.92 means they have usually moved in the same direction. Both charge a 0.25% expense ratio.

Performance

LFAI vs. LDDR - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in LifeX 2050 Longevity Income ETF (LFAI) and LifeX 2035 Income Bucket ETF (LDDR). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, LFAI achieves a -2.25% return, which is significantly lower than LDDR's -0.52% return.

LFAI

• 1D: -0.53%
• 1M: -2.37%
• 6M: -2.26%
• YTD: -2.25%
• 1Y: -0.64%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: -2.00%

LDDR

• 1D: -0.21%
• 1M: -0.67%
• 6M: -0.55%
• YTD: -0.52%
• 1Y: 1.29%
• 3Y*: —
• 5Y*: —
• 10Y*: —
• ALL TIME*: 3.91%

*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)
LDDR LifeX 2035 Income Bucket ETF	$28.91K	$34.28K	$95.52K
LFAI LifeX 2050 Longevity Income ETF	$3.88K	$4.56K	$38.61K

LFAI vs. LDDR - Yearly Performance Comparison

	2026 (YTD)	2025
LFAI LifeX 2050 Longevity Income ETF	-2.25%	6.22%
LDDR LifeX 2035 Income Bucket ETF	-0.52%	6.74%

Correlation

The correlation between LFAI and LDDR is 0.93, 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.	0.93
Correlation (All Time) Calculated using the full available price history since Jan 6, 2025	0.92

The correlation between LFAI and LDDR has been stable across timeframes, ranging from 0.92 to 0.93 - a consistent structural relationship.

Return for Risk

LFAI vs. LDDR — Risk / Return Rank

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

LFAI

LFAI Risk / Return Rank: 12
LFAI Sharpe Ratio Rank: 13
LFAI Sortino Ratio Rank: 11
LFAI Omega Ratio Rank: 11
LFAI Calmar Ratio Rank: 12
LFAI Martin Ratio Rank: 12

LDDR

LDDR Risk / Return Rank: 27
LDDR Sharpe Ratio Rank: 29
LDDR Sortino Ratio Rank: 27
LDDR Omega Ratio Rank: 25
LDDR Calmar Ratio Rank: 27
LDDR Martin Ratio Rank: 25

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.

LFAI vs. LDDR - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for LifeX 2050 Longevity Income ETF (LFAI) and LifeX 2035 Income Bucket ETF (LDDR). 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.

	LFAI	LDDR	Difference
Sharpe ratio: Return per unit of total volatility	0.08	0.69	-0.61
Sortino ratio: Return per unit of downside risk	0.16	1.04	-0.88
Omega ratio: Gain probability vs. loss probability	1.02	1.12	-0.10
Calmar ratio: Return relative to maximum drawdown	0.09	0.85	-0.76
Martin ratio: Return relative to average drawdown	0.22	2.00	-1.79

LFAI vs. LDDR - Sharpe Ratio Comparison

The current LFAI Sharpe Ratio is 0.08, which is lower than the LDDR Sharpe Ratio of 0.69. The chart below compares the historical Sharpe Ratios of LFAI and LDDR, 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

LFAI vs. LDDR - Drawdown Comparison

The maximum LFAI drawdown since its inception was -8.64%, which is greater than LDDR's maximum drawdown of -2.50%. Use the drawdown chart below to compare losses from any high point for LFAI and LDDR.

Drawdown Indicators

	LFAI	LDDR	Difference
Max Drawdown Largest peak-to-trough decline	-8.64%	-2.50%	-6.14%
Max Drawdown (1Y) Largest decline over 1 year	-5.30%	-2.50%	-2.80%
Current Drawdown Current decline from peak	-5.14%	-2.05%	-3.09%
Average Drawdown Average peak-to-trough decline	-3.51%	-0.78%	-2.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.31%	1.06%	+1.25%

Volatility

LFAI vs. LDDR - Volatility Comparison

LifeX 2050 Longevity Income ETF (LFAI) has a higher volatility of 1.59% compared to LifeX 2035 Income Bucket ETF (LDDR) at 0.77%. This indicates that LFAI's price experiences larger fluctuations and is considered to be riskier than LDDR based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	LFAI	LDDR	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.59%	0.77%	+0.82%
Volatility (6M) Calculated over the trailing 6-month period	4.73%	2.36%	+2.37%
Volatility (1Y) Calculated over the trailing 1-year period	6.13%	3.09%	+3.04%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.07%	3.94%	+3.13%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.07%	3.94%	+3.13%

LFAI vs. LDDR - Expense Ratio Comparison

Both LFAI and LDDR have an expense ratio of 0.25%, making them cost-effective options compared to the broader market, where average expense ratios typically range from 0.3% to 0.9%.

Dividends

LFAI vs. LDDR - Dividend Comparison

LFAI's dividend yield for the trailing twelve months is around 13.71%, more than LDDR's 12.85% yield.

Position	TTM	2025	2024
LDDR LifeX 2035 Income Bucket ETF	12.85%	14.63%	0.00%
LFAI LifeX 2050 Longevity Income ETF	13.71%	16.48%	1.91%

Frequently Asked Questions

Can I hold both LFAI and LDDR in my portfolio?

With a correlation of 0.93, LFAI and LDDR 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, LFAI or LDDR?

LFAI has higher volatility (1.59%) compared to LDDR (0.77%). In terms of maximum drawdown, LFAI dropped -8.64% vs LDDR's -2.50%.

Which ETF is better, LFAI or LDDR?

On 1-year performance, LDDR leads with 1.29% vs -0.64% for LFAI. Both ETFs have the same 0.25% expense ratio. On volatility, LDDR has been the lower-risk option at 0.77%. The better choice depends on whether you care most about return, fees, risk, or income.

Which ETF has performed better, LFAI or LDDR?

Over the 1-year period, LDDR has performed better with a 1.29% return vs -0.64%. Past performance does not guarantee future results, so compare this with risk, fees, and fund exposure.

Which ETF is cheaper, LFAI or LDDR?

LFAI and LDDR have the same expense ratio: 0.25% per year.

Which ETF pays a higher dividend yield, LFAI or LDDR?

LFAI has the higher dividend yield at 13.71%, compared with 12.85% for LDDR.

What is the main difference between LFAI and LDDR?

LFAI is categorized as Government Bonds, while LDDR is Target Retirement Date.

Which has better risk-adjusted returns?

LDDR currently has the higher Sharpe Ratio (0.69 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.