TRRDX vs. PTDIX

Last updated Jun 5, 2026

TRRDX (T. Rowe Price Retirement 2040 Fund) and PTDIX (Principal LifeTime 2040 Fund) are both Target Retirement Date funds. Over the past 10 years, TRRDX returned 10.56%/yr vs 10.47%/yr for PTDIX. With a 0.96 correlation, they move nearly in lockstep. TRRDX charges 0.61%/yr vs 0.01%/yr for PTDIX.

Performance

TRRDX vs. PTDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Retirement 2040 Fund (TRRDX) and Principal LifeTime 2040 Fund (PTDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TRRDX achieves a 9.77% return, which is significantly higher than PTDIX's 7.02% return. Both investments have delivered pretty close results over the past 10 years, with TRRDX having a 10.56% annualized return and PTDIX not far behind at 10.47%.

TRRDX

• 1D: -0.63%
• 1M: 2.75%
• YTD: 9.77%
• 6M: 5.56%
• 1Y: 17.41%
• 3Y*: 15.37%
• 5Y*: 7.23%
• 10Y*: 10.56%

PTDIX

• 1D: -0.72%
• 1M: 2.29%
• YTD: 7.02%
• 6M: 7.37%
• 1Y: 18.19%
• 3Y*: 16.85%
• 5Y*: 8.00%
• 10Y*: 10.47%

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

TRRDX vs. PTDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
TRRDX T. Rowe Price Retirement 2040 Fund	9.77%	12.53%	13.15%	19.60%	-18.77%	16.52%	18.10%	24.71%	-7.41%	22.03%
PTDIX Principal LifeTime 2040 Fund	7.02%	15.59%	17.43%	18.33%	-18.13%	15.35%	16.04%	24.91%	-7.95%	20.69%

Correlation

The correlation between TRRDX and PTDIX is 0.94, 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	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.96
Correlation (10Y) Calculated over the trailing 10-year period	0.96
Correlation (All Time) Calculated using the full available price history since Oct 1, 2002	0.96

The correlation between TRRDX and PTDIX has been stable across timeframes, ranging from 0.94 to 0.96 - a consistent structural relationship.

Return for Risk

TRRDX vs. PTDIX — Risk / Return Rank

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

TRRDX

TRRDX Risk / Return Rank: 32
TRRDX Sharpe Ratio Rank: 31
TRRDX Sortino Ratio Rank: 28
TRRDX Omega Ratio Rank: 33
TRRDX Calmar Ratio Rank: 30
TRRDX Martin Ratio Rank: 38

PTDIX

PTDIX Risk / Return Rank: 46
PTDIX Sharpe Ratio Rank: 42
PTDIX Sortino Ratio Rank: 42
PTDIX Omega Ratio Rank: 42
PTDIX Calmar Ratio Rank: 45
PTDIX Martin Ratio Rank: 56

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.

TRRDX vs. PTDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Retirement 2040 Fund (TRRDX) and Principal LifeTime 2040 Fund (PTDIX). 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.

	TRRDX	PTDIX	Difference
Sharpe ratio: Return per unit of total volatility	1.60	1.88	-0.28
Sortino ratio: Return per unit of downside risk	2.23	2.68	-0.44
Omega ratio: Gain probability vs. loss probability	1.31	1.35	-0.04
Calmar ratio: Return relative to maximum drawdown	2.05	2.53	-0.47
Martin ratio: Return relative to average drawdown	8.26	11.23	-2.97
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TRRDX vs. PTDIX - Sharpe Ratio Comparison

The current TRRDX Sharpe Ratio is 1.60, which is comparable to the PTDIX Sharpe Ratio of 1.88. The chart below compares the historical Sharpe Ratios of TRRDX and PTDIX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	TRRDX	PTDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.60	1.88	-0.28
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.52	0.60	-0.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.73	0.76	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.59	0.48	+0.11

Drawdowns

TRRDX vs. PTDIX - Drawdown Comparison

The maximum TRRDX drawdown since its inception was -53.50%, roughly equal to the maximum PTDIX drawdown of -54.38%. Use the drawdown chart below to compare losses from any high point for TRRDX and PTDIX.

Drawdown Indicators

	TRRDX	PTDIX	Difference
Max Drawdown Largest peak-to-trough decline	-53.50%	-54.38%	+0.88%
Max Drawdown (1Y) Largest decline over 1 year	-8.88%	-7.32%	-1.56%
Max Drawdown (3Y) Largest decline over 3 years	-14.03%	-13.05%	-0.98%
Max Drawdown (5Y) Largest decline over 5 years	-27.26%	-25.43%	-1.83%
Max Drawdown (10Y) Largest decline over 10 years	-31.46%	-30.02%	-1.44%
Current Drawdown Current decline from peak	-0.63%	-0.72%	+0.09%
Average Drawdown Average peak-to-trough decline	-6.54%	-7.49%	+0.95%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.18%	1.64%	+0.54%

Volatility

TRRDX vs. PTDIX - Volatility Comparison

T. Rowe Price Retirement 2040 Fund (TRRDX) has a higher volatility of 3.25% compared to Principal LifeTime 2040 Fund (PTDIX) at 2.98%. This indicates that TRRDX's price experiences larger fluctuations and is considered to be riskier than PTDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TRRDX	PTDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.25%	2.98%	+0.27%
Volatility (6M) Calculated over the trailing 6-month period	9.52%	7.87%	+1.65%
Volatility (1Y) Calculated over the trailing 1-year period	11.40%	9.84%	+1.56%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.15%	13.50%	+0.65%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.62%	13.83%	+0.79%

TRRDX vs. PTDIX - Expense Ratio Comparison

TRRDX has a 0.61% expense ratio, which is higher than PTDIX's 0.01% expense ratio.

Dividends

TRRDX vs. PTDIX - Dividend Comparison

TRRDX has not paid dividends to shareholders, while PTDIX's dividend yield for the trailing twelve months is around 9.16%.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
PTDIX Principal LifeTime 2040 Fund	9.16%	9.80%	12.28%	4.40%	8.61%	8.92%	6.01%	7.26%	9.28%	6.07%	4.86%	6.73%
TRRDX T. Rowe Price Retirement 2040 Fund	0.00%	0.00%	2.26%	5.60%	8.92%	7.92%	4.96%	6.10%	9.51%	3.96%	3.36%	4.61%

Frequently Asked Questions

Can I hold both TRRDX and PTDIX in my portfolio?

With a correlation of 0.94, TRRDX and PTDIX 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, TRRDX or PTDIX?

TRRDX has higher volatility (3.25%) compared to PTDIX (2.98%). In terms of maximum drawdown, TRRDX dropped -53.50% vs PTDIX's -54.38%.

Which has better risk-adjusted returns?

PTDIX currently has the higher Sharpe Ratio (1.88 vs 1.60), 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.