PDKFX vs. IRSOX

Last updated Jun 4, 2026

PDKFX (Prudential Day One 2055 Fund) and IRSOX (Voya Target Retirement 2040 Fund) are both Target Retirement Date funds. Over the past 5 years, PDKFX returned 12.44%/yr vs 9.48%/yr for IRSOX. Their correlation of 0.95 suggests significant overlap in exposure. PDKFX charges 0.25%/yr vs 0.23%/yr for IRSOX.

Performance

PDKFX vs. IRSOX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Prudential Day One 2055 Fund (PDKFX) and Voya Target Retirement 2040 Fund (IRSOX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, PDKFX achieves a 12.43% return, which is significantly higher than IRSOX's 11.67% return.

PDKFX

• 1D: 0.36%
• 1M: 4.77%
• YTD: 12.43%
• 6M: 13.23%
• 1Y: 27.24%
• 3Y*: 23.20%
• 5Y*: 12.44%
• 10Y*: —

IRSOX

• 1D: 0.35%
• 1M: 5.13%
• YTD: 11.67%
• 6M: 12.45%
• 1Y: 26.71%
• 3Y*: 18.38%
• 5Y*: 9.48%
• 10Y*: 11.24%

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

PDKFX vs. IRSOX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
PDKFX Prudential Day One 2055 Fund	12.43%	19.18%	26.86%	18.21%	-15.57%	19.61%	11.32%	24.02%	-9.36%	21.14%
IRSOX Voya Target Retirement 2040 Fund	11.67%	19.10%	13.74%	19.25%	-18.43%	17.65%	16.93%	23.69%	-8.31%	19.30%

Correlation

The correlation between PDKFX and IRSOX is 0.89, 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	0.89
Correlation (3Y) Calculated over the trailing 3-year period	0.95
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (All Time) Calculated using the full available price history since Jan 4, 2017	0.95

The correlation between PDKFX and IRSOX has been stable across timeframes, ranging from 0.89 to 0.95 - a consistent structural relationship.

Return for Risk

PDKFX vs. IRSOX — Risk / Return Rank

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

PDKFX

PDKFX Risk / Return Rank: 60
PDKFX Sharpe Ratio Rank: 61
PDKFX Sortino Ratio Rank: 58
PDKFX Omega Ratio Rank: 58
PDKFX Calmar Ratio Rank: 59
PDKFX Martin Ratio Rank: 67

IRSOX

IRSOX Risk / Return Rank: 82
IRSOX Sharpe Ratio Rank: 85
IRSOX Sortino Ratio Rank: 83
IRSOX Omega Ratio Rank: 78
IRSOX Calmar Ratio Rank: 78
IRSOX Martin Ratio Rank: 87

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.

PDKFX vs. IRSOX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Prudential Day One 2055 Fund (PDKFX) and Voya Target Retirement 2040 Fund (IRSOX). 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.

	PDKFX	IRSOX	Difference
Sharpe ratio: Return per unit of total volatility	2.31	2.75	-0.44
Sortino ratio: Return per unit of downside risk	3.22	3.99	-0.77
Omega ratio: Gain probability vs. loss probability	1.42	1.51	-0.09
Calmar ratio: Return relative to maximum drawdown	2.94	3.53	-0.59
Martin ratio: Return relative to average drawdown	13.06	16.89	-3.83
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

PDKFX vs. IRSOX - Sharpe Ratio Comparison

The current PDKFX Sharpe Ratio is 2.31, which is comparable to the IRSOX Sharpe Ratio of 2.75. The chart below compares the historical Sharpe Ratios of PDKFX and IRSOX, 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

	PDKFX	IRSOX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.31	2.75	-0.44
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.53	0.70	-0.17
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.77	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.62	0.75	-0.14

Drawdowns

PDKFX vs. IRSOX - Drawdown Comparison

The maximum PDKFX drawdown since its inception was -40.97%, which is greater than IRSOX's maximum drawdown of -31.25%. Use the drawdown chart below to compare losses from any high point for PDKFX and IRSOX.

Drawdown Indicators

	PDKFX	IRSOX	Difference
Max Drawdown Largest peak-to-trough decline	-40.97%	-31.25%	-9.72%
Max Drawdown (1Y) Largest decline over 1 year	-9.40%	-8.38%	-1.02%
Max Drawdown (3Y) Largest decline over 3 years	-15.34%	-13.84%	-1.50%
Max Drawdown (5Y) Largest decline over 5 years	-40.97%	-25.24%	-15.73%
Max Drawdown (10Y) Largest decline over 10 years	—	-31.25%	—
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-10.59%	-4.28%	-6.31%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.11%	1.69%	+0.42%

Volatility

PDKFX vs. IRSOX - Volatility Comparison

Prudential Day One 2055 Fund (PDKFX) has a higher volatility of 3.62% compared to Voya Target Retirement 2040 Fund (IRSOX) at 3.36%. This indicates that PDKFX's price experiences larger fluctuations and is considered to be riskier than IRSOX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	PDKFX	IRSOX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.62%	3.36%	+0.26%
Volatility (6M) Calculated over the trailing 6-month period	9.58%	8.82%	+0.76%
Volatility (1Y) Calculated over the trailing 1-year period	11.94%	10.75%	+1.19%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	23.66%	13.87%	+9.79%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	20.62%	14.80%	+5.82%

PDKFX vs. IRSOX - Expense Ratio Comparison

PDKFX has a 0.25% expense ratio, which is higher than IRSOX's 0.23% 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

PDKFX vs. IRSOX - Dividend Comparison

PDKFX's dividend yield for the trailing twelve months is around 3.55%, less than IRSOX's 12.27% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IRSOX Voya Target Retirement 2040 Fund	12.27%	13.71%	2.25%	2.13%	6.01%	17.52%	3.71%	4.14%	5.84%	5.86%	1.98%	0.41%
PDKFX Prudential Day One 2055 Fund	3.55%	3.99%	24.13%	3.12%	5.29%	31.77%	2.00%	4.97%	6.17%	2.01%	0.00%	0.00%

Frequently Asked Questions

Can I hold both PDKFX and IRSOX in my portfolio?

PDKFX and IRSOX have a correlation of 0.89, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, PDKFX or IRSOX?

PDKFX has higher volatility (3.62%) compared to IRSOX (3.36%). In terms of maximum drawdown, PDKFX dropped -40.97% vs IRSOX's -31.25%.

Which has better risk-adjusted returns?

IRSOX currently has the higher Sharpe Ratio (2.75 vs 2.31), 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.