TBLBX vs. PDDDX

Last updated Jun 4, 2026

TBLBX (T. Rowe Price Retirement Blend 2010 Fund) and PDDDX (Prudential Day One 2020 Fund) are both Target Retirement Date funds. Over the past 3 years, TBLBX returned 11.68%/yr vs 12.66%/yr for PDDDX. Their correlation of 0.93 suggests significant overlap in exposure. TBLBX charges 0.19%/yr vs 0.76%/yr for PDDDX.

Performance

TBLBX vs. PDDDX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Retirement Blend 2010 Fund (TBLBX) and Prudential Day One 2020 Fund (PDDDX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, TBLBX achieves a 6.15% return, which is significantly higher than PDDDX's 5.76% return.

TBLBX

• 1D: 0.27%
• 1M: 2.47%
• YTD: 6.15%
• 6M: 6.56%
• 1Y: 15.13%
• 3Y*: 11.68%
• 5Y*: —
• 10Y*: —

PDDDX

• 1D: 0.09%
• 1M: 1.38%
• YTD: 5.76%
• 6M: 5.67%
• 1Y: 12.97%
• 3Y*: 12.66%
• 5Y*: 10.94%
• 10Y*: —

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

TBLBX vs. PDDDX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021
TBLBX T. Rowe Price Retirement Blend 2010 Fund	6.15%	12.59%	9.03%	12.95%	-13.37%	1.38%
PDDDX Prudential Day One 2020 Fund	5.76%	10.40%	15.97%	9.52%	-12.63%	26.05%

Correlation

The correlation between TBLBX and PDDDX is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (All Time) Calculated using the full available price history since Aug 4, 2021	0.93

The correlation between TBLBX and PDDDX has been stable across timeframes, ranging from 0.92 to 0.94 - a consistent structural relationship.

Return for Risk

TBLBX vs. PDDDX — Risk / Return Rank

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

TBLBX

TBLBX Risk / Return Rank: 72
TBLBX Sharpe Ratio Rank: 75
TBLBX Sortino Ratio Rank: 74
TBLBX Omega Ratio Rank: 76
TBLBX Calmar Ratio Rank: 64
TBLBX Martin Ratio Rank: 72

PDDDX

PDDDX Risk / Return Rank: 81
PDDDX Sharpe Ratio Rank: 83
PDDDX Sortino Ratio Rank: 83
PDDDX Omega Ratio Rank: 80
PDDDX Calmar Ratio Rank: 75
PDDDX Martin Ratio Rank: 84

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.

TBLBX vs. PDDDX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Retirement Blend 2010 Fund (TBLBX) and Prudential Day One 2020 Fund (PDDDX). 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.

	TBLBX	PDDDX	Difference
Sharpe ratio: Return per unit of total volatility	2.53	2.70	-0.17
Sortino ratio: Return per unit of downside risk	3.63	3.94	-0.31
Omega ratio: Gain probability vs. loss probability	1.50	1.53	-0.03
Calmar ratio: Return relative to maximum drawdown	3.10	3.37	-0.27
Martin ratio: Return relative to average drawdown	13.76	15.78	-2.01
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TBLBX vs. PDDDX - Sharpe Ratio Comparison

The current TBLBX Sharpe Ratio is 2.53, which is comparable to the PDDDX Sharpe Ratio of 2.70. The chart below compares the historical Sharpe Ratios of TBLBX and PDDDX, 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

	TBLBX	PDDDX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.53	2.70	-0.17
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	—	0.80	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.67	0.82	-0.15

Drawdowns

TBLBX vs. PDDDX - Drawdown Comparison

The maximum TBLBX drawdown since its inception was -18.87%, roughly equal to the maximum PDDDX drawdown of -18.88%. Use the drawdown chart below to compare losses from any high point for TBLBX and PDDDX.

Drawdown Indicators

	TBLBX	PDDDX	Difference
Max Drawdown Largest peak-to-trough decline	-18.87%	-18.88%	+0.01%
Max Drawdown (1Y) Largest decline over 1 year	-4.95%	-3.90%	-1.05%
Max Drawdown (3Y) Largest decline over 3 years	-7.29%	-6.09%	-1.20%
Max Drawdown (5Y) Largest decline over 5 years	—	-16.64%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-4.73%	-3.01%	-1.72%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.11%	0.83%	+0.28%

Volatility

TBLBX vs. PDDDX - Volatility Comparison

T. Rowe Price Retirement Blend 2010 Fund (TBLBX) has a higher volatility of 2.00% compared to Prudential Day One 2020 Fund (PDDDX) at 1.59%. This indicates that TBLBX's price experiences larger fluctuations and is considered to be riskier than PDDDX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TBLBX	PDDDX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.00%	1.59%	+0.41%
Volatility (6M) Calculated over the trailing 6-month period	4.94%	3.91%	+1.03%
Volatility (1Y) Calculated over the trailing 1-year period	6.06%	4.87%	+1.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	8.14%	13.75%	-5.61%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	8.14%	11.37%	-3.23%

TBLBX vs. PDDDX - Expense Ratio Comparison

TBLBX has a 0.19% expense ratio, which is lower than PDDDX's 0.76% expense ratio.

Dividends

TBLBX vs. PDDDX - Dividend Comparison

TBLBX's dividend yield for the trailing twelve months is around 3.21%, less than PDDDX's 3.83% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDDDX Prudential Day One 2020 Fund	3.83%	4.05%	19.73%	3.22%	8.41%	28.05%	1.91%	3.76%	3.05%	0.86%
TBLBX T. Rowe Price Retirement Blend 2010 Fund	3.21%	3.41%	3.18%	2.23%	3.92%	1.86%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both TBLBX and PDDDX in my portfolio?

With a correlation of 0.92, TBLBX and PDDDX 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, TBLBX or PDDDX?

TBLBX has higher volatility (2.00%) compared to PDDDX (1.59%). In terms of maximum drawdown, TBLBX dropped -18.87% vs PDDDX's -18.88%.

Which has better risk-adjusted returns?

PDDDX currently has the higher Sharpe Ratio (2.70 vs 2.53), 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.