PRTLX vs. LTTIX

Last updated Jun 27, 2026

PRTLX (Putnam RetirementReady 2055 Fund) and LTTIX (MFS Lifetime 2025 Fund) are both Target Retirement Date funds. Over the past 10 years, PRTLX returned 11.03%/yr vs 6.24%/yr for LTTIX. Their correlation of 0.90 suggests significant overlap in exposure. PRTLX charges 0.03%/yr vs 0.00%/yr for LTTIX.

Performance

PRTLX vs. LTTIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Putnam RetirementReady 2055 Fund (PRTLX) 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, PRTLX achieves a 5.71% return, which is significantly higher than LTTIX's 2.74% return. Over the past 10 years, PRTLX has outperformed LTTIX with an annualized return of 11.03%, while LTTIX has yielded a comparatively lower 6.24% annualized return.

PRTLX

• 1D: 0.38%
• 1M: -0.56%
• YTD: 5.71%
• 6M: 4.76%
• 1Y: 14.07%
• 3Y*: 15.44%
• 5Y*: 8.38%
• 10Y*: 11.03%

LTTIX

• 1D: 0.00%
• 1M: 0.08%
• YTD: 2.74%
• 6M: 2.35%
• 1Y: 7.16%
• 3Y*: 8.33%
• 5Y*: 3.72%
• 10Y*: 6.24%

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

PRTLX vs. LTTIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PRTLX Putnam RetirementReady 2055 Fund	5.71%	13.42%	15.59%	22.31%	-15.71%	17.39%	14.17%	20.75%	-9.44%	20.69%
LTTIX MFS Lifetime 2025 Fund	2.74%	9.29%	6.73%	10.36%	-12.36%	8.61%	10.61%	17.82%	-3.97%	13.16%

Correlation

The correlation between PRTLX and LTTIX is 0.81, 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	0.81
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.84
Correlation (10Y) Calculated over the trailing 10-year period	0.88
Correlation (All Time) Calculated using the full available price history since Jan 2, 2013	0.90

The correlation between PRTLX and LTTIX has been stable across timeframes, ranging from 0.80 to 0.90 - a consistent structural relationship.

Return for Risk

PRTLX vs. LTTIX — Risk / Return Rank

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

PRTLX

PRTLX Risk / Return Rank: 29
PRTLX Sharpe Ratio Rank: 28
PRTLX Sortino Ratio Rank: 27
PRTLX Omega Ratio Rank: 28
PRTLX Calmar Ratio Rank: 28
PRTLX Martin Ratio Rank: 36

LTTIX

LTTIX Risk / Return Rank: 72
LTTIX Sharpe Ratio Rank: 77
LTTIX Sortino Ratio Rank: 80
LTTIX Omega Ratio Rank: 78
LTTIX Calmar Ratio Rank: 57
LTTIX Martin Ratio Rank: 67

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.

PRTLX vs. LTTIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Putnam RetirementReady 2055 Fund (PRTLX) 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.

	PRTLX	LTTIX	Difference
Sharpe ratio: Return per unit of total volatility	1.28	2.16	-0.88
Sortino ratio: Return per unit of downside risk	1.81	3.20	-1.39
Omega ratio: Gain probability vs. loss probability	1.23	1.42	-0.19
Calmar ratio: Return relative to maximum drawdown	1.70	2.47	-0.77
Martin ratio: Return relative to average drawdown	6.94	10.68	-3.74

PRTLX vs. LTTIX - Sharpe Ratio Comparison

The current PRTLX Sharpe Ratio is 1.28, which is lower than the LTTIX Sharpe Ratio of 2.16. The chart below compares the historical Sharpe Ratios of PRTLX 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

PRTLX vs. LTTIX - Drawdown Comparison

The maximum PRTLX drawdown since its inception was -28.52%, which is greater than LTTIX's maximum drawdown of -19.33%. Use the drawdown chart below to compare losses from any high point for PRTLX and LTTIX.

Drawdown Indicators

	PRTLX	LTTIX	Difference
Max Drawdown Largest peak-to-trough decline	-28.52%	-19.33%	-9.19%
Max Drawdown (1Y) Largest decline over 1 year	-8.87%	-3.64%	-5.23%
Max Drawdown (3Y) Largest decline over 3 years	-18.55%	-5.77%	-12.78%
Max Drawdown (5Y) Largest decline over 5 years	-21.71%	-16.92%	-4.79%
Max Drawdown (10Y) Largest decline over 10 years	-28.52%	-19.33%	-9.19%
Current Drawdown Current decline from peak	-1.79%	-0.45%	-1.34%
Average Drawdown Average peak-to-trough decline	-5.55%	-2.68%	-2.87%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.17%	0.84%	+1.33%

Volatility

PRTLX vs. LTTIX - Volatility Comparison

Putnam RetirementReady 2055 Fund (PRTLX) has a higher volatility of 4.82% compared to MFS Lifetime 2025 Fund (LTTIX) at 1.34%. This indicates that PRTLX'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

	PRTLX	LTTIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.82%	1.34%	+3.48%
Volatility (6M) Calculated over the trailing 6-month period	9.62%	3.32%	+6.30%
Volatility (1Y) Calculated over the trailing 1-year period	11.85%	4.18%	+7.67%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.09%	6.37%	+7.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.58%	7.24%	+7.34%

PRTLX vs. LTTIX - Expense Ratio Comparison

PRTLX has a 0.03% 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

PRTLX vs. LTTIX - Dividend Comparison

PRTLX's dividend yield for the trailing twelve months is around 1.59%, 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%
PRTLX Putnam RetirementReady 2055 Fund	1.59%	1.68%	1.20%	1.60%	10.10%	12.83%	1.09%	7.44%	15.18%	5.47%	1.14%	9.07%

Frequently Asked Questions

Can I hold both PRTLX and LTTIX in my portfolio?

PRTLX and LTTIX have a correlation of 0.81, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PRTLX or LTTIX?

PRTLX has higher volatility (4.82%) compared to LTTIX (1.34%). In terms of maximum drawdown, PRTLX dropped -28.52% vs LTTIX's -19.33%.

Which has better risk-adjusted returns?

LTTIX currently has the higher Sharpe Ratio (2.16 vs 1.28), 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.