TBLAX vs. LTTIX

Last updated Jun 23, 2026

TBLAX (T. Rowe Price Retirement Blend 2005 Fund) and LTTIX (MFS Lifetime 2025 Fund) are both Target Retirement Date funds. Over the past 3 years, TBLAX returned 10.60%/yr vs 8.33%/yr for LTTIX. Their correlation of 0.93 suggests significant overlap in exposure. TBLAX charges 0.19%/yr vs 0.00%/yr for LTTIX.

Performance

TBLAX vs. LTTIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Retirement Blend 2005 Fund (TBLAX) and MFS Lifetime 2025 Fund (LTTIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TBLAX achieves a 5.51% return, which is significantly higher than LTTIX's 2.74% return.

TBLAX

• 1D: 0.54%
• 1M: 0.91%
• YTD: 5.51%
• 6M: 5.51%
• 1Y: 13.59%
• 3Y*: 10.60%
• 5Y*: —
• 10Y*: —

LTTIX

• 1D: 0.00%
• 1M: 0.08%
• YTD: 2.74%
• 6M: 2.70%
• 1Y: 8.28%
• 3Y*: 8.33%
• 5Y*: 3.72%
• 10Y*: 6.24%

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

TBLAX vs. LTTIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
TBLAX T. Rowe Price Retirement Blend 2005 Fund	5.51%	12.08%	8.71%	12.41%	-13.11%	1.40%
LTTIX MFS Lifetime 2025 Fund	2.74%	9.29%	6.73%	10.36%	-12.36%	1.68%

Correlation

The correlation between TBLAX and LTTIX is 0.88, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (All Time) Calculated using the full available price history since Aug 3, 2021	0.93

The correlation between TBLAX and LTTIX has been stable across timeframes, ranging from 0.88 to 0.93 - a consistent structural relationship.

Return for Risk

TBLAX vs. LTTIX — Risk / Return Rank

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

TBLAX

TBLAX Risk / Return Rank: 73
TBLAX Sharpe Ratio Rank: 75
TBLAX Sortino Ratio Rank: 76
TBLAX Omega Ratio Rank: 77
TBLAX Calmar Ratio Rank: 65
TBLAX Martin Ratio Rank: 73

LTTIX

LTTIX Risk / Return Rank: 61
LTTIX Sharpe Ratio Rank: 64
LTTIX Sortino Ratio Rank: 71
LTTIX Omega Ratio Rank: 70
LTTIX Calmar Ratio Rank: 46
LTTIX Martin Ratio Rank: 57

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.

TBLAX vs. LTTIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Retirement Blend 2005 Fund (TBLAX) and MFS Lifetime 2025 Fund (LTTIX). 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.

	TBLAX	LTTIX	Difference
Sharpe ratio: Return per unit of total volatility	2.31	2.16	+0.16
Sortino ratio: Return per unit of downside risk	3.33	3.20	+0.13
Omega ratio: Gain probability vs. loss probability	1.46	1.42	+0.03
Calmar ratio: Return relative to maximum drawdown	2.96	2.47	+0.49
Martin ratio: Return relative to average drawdown	13.03	10.68	+2.34

TBLAX vs. LTTIX - Sharpe Ratio Comparison

The current TBLAX Sharpe Ratio is 2.31, which is comparable to the LTTIX Sharpe Ratio of 2.16. The chart below compares the historical Sharpe Ratios of TBLAX and LTTIX, 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

TBLAX vs. LTTIX - Drawdown Comparison

The maximum TBLAX drawdown since its inception was -18.31%, smaller than the maximum LTTIX drawdown of -19.33%. Use the drawdown chart below to compare losses from any high point for TBLAX and LTTIX.

Drawdown Indicators

	TBLAX	LTTIX	Difference
Max Drawdown Largest peak-to-trough decline	-18.31%	-19.33%	+1.02%
Max Drawdown (1Y) Largest decline over 1 year	-4.61%	-3.64%	-0.97%
Max Drawdown (3Y) Largest decline over 3 years	-6.58%	-5.77%	-0.81%
Max Drawdown (5Y) Largest decline over 5 years	—	-16.92%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-19.33%	—
Current Drawdown Current decline from peak	-0.27%	-0.45%	+0.18%
Average Drawdown Average peak-to-trough decline	-4.55%	-2.68%	-1.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.05%	0.84%	+0.21%

Volatility

TBLAX vs. LTTIX - Volatility Comparison

T. Rowe Price Retirement Blend 2005 Fund (TBLAX) has a higher volatility of 2.32% compared to MFS Lifetime 2025 Fund (LTTIX) at 1.34%. This indicates that TBLAX's price experiences larger fluctuations and is considered to be riskier than LTTIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TBLAX	LTTIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.32%	1.34%	+0.98%
Volatility (6M) Calculated over the trailing 6-month period	4.97%	3.32%	+1.65%
Volatility (1Y) Calculated over the trailing 1-year period	5.90%	4.18%	+1.72%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.53%	6.37%	+1.16%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.53%	7.24%	+0.29%

TBLAX vs. LTTIX - Expense Ratio Comparison

TBLAX has a 0.19% expense ratio, which is higher than LTTIX's 0.00% 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

TBLAX vs. LTTIX - Dividend Comparison

TBLAX's dividend yield for the trailing twelve months is around 3.45%, less than LTTIX's 11.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
LTTIX MFS Lifetime 2025 Fund	11.54%	8.13%	7.07%	3.30%	5.88%	7.35%	2.83%	3.68%	4.32%	3.51%	4.03%	1.82%
TBLAX T. Rowe Price Retirement Blend 2005 Fund	3.45%	3.64%	2.33%	2.45%	3.65%	2.07%	0.00%	0.00%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both TBLAX and LTTIX in my portfolio?

TBLAX and LTTIX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, TBLAX or LTTIX?

TBLAX has higher volatility (2.32%) compared to LTTIX (1.34%). In terms of maximum drawdown, TBLAX dropped -18.31% vs LTTIX's -19.33%.

Which has better risk-adjusted returns?

TBLAX currently has the higher Sharpe Ratio (2.31 vs 2.16), 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.