IDXGX vs. PTDIX

Last updated Jun 4, 2026

IDXGX (Voya Index Solution 2030 Portfolio) and PTDIX (Principal LifeTime 2040 Fund) are both Target Retirement Date funds. Over the past 10 years, IDXGX returned 8.96%/yr vs 10.55%/yr for PTDIX. With a 0.96 correlation, they move nearly in lockstep. IDXGX charges 0.20%/yr vs 0.01%/yr for PTDIX.

Performance

IDXGX vs. PTDIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Index Solution 2030 Portfolio (IDXGX) and Principal LifeTime 2040 Fund (PTDIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with IDXGX having a 7.95% return and PTDIX slightly lower at 7.80%. Over the past 10 years, IDXGX has underperformed PTDIX with an annualized return of 8.96%, while PTDIX has yielded a comparatively higher 10.55% annualized return.

IDXGX

• 1D: 0.20%
• 1M: 3.66%
• YTD: 7.95%
• 6M: 8.36%
• 1Y: 19.38%
• 3Y*: 14.12%
• 5Y*: 6.87%
• 10Y*: 8.96%

PTDIX

• 1D: 0.34%
• 1M: 3.88%
• YTD: 7.80%
• 6M: 8.09%
• 1Y: 19.26%
• 3Y*: 17.13%
• 5Y*: 8.31%
• 10Y*: 10.55%

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

IDXGX vs. PTDIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IDXGX Voya Index Solution 2030 Portfolio	7.95%	15.39%	10.45%	15.48%	-16.42%	12.43%	13.74%	20.99%	-6.10%	17.14%
PTDIX Principal LifeTime 2040 Fund	7.80%	15.59%	17.43%	18.33%	-18.13%	15.35%	16.04%	24.91%	-7.95%	20.69%

Correlation

The correlation between IDXGX and PTDIX is 0.87, 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	0.87
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Oct 5, 2011	0.96

The correlation between IDXGX and PTDIX has been stable across timeframes, ranging from 0.87 to 0.96 - a consistent structural relationship.

Return for Risk

IDXGX vs. PTDIX — Risk / Return Rank

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

IDXGX

IDXGX Risk / Return Rank: 77
IDXGX Sharpe Ratio Rank: 79
IDXGX Sortino Ratio Rank: 81
IDXGX Omega Ratio Rank: 74
IDXGX Calmar Ratio Rank: 71
IDXGX Martin Ratio Rank: 82

PTDIX

PTDIX Risk / Return Rank: 50
PTDIX Sharpe Ratio Rank: 46
PTDIX Sortino Ratio Rank: 46
PTDIX Omega Ratio Rank: 47
PTDIX Calmar Ratio Rank: 49
PTDIX Martin Ratio Rank: 60

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.

IDXGX vs. PTDIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Index Solution 2030 Portfolio (IDXGX) 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.

	IDXGX	PTDIX	Difference
Sharpe ratio: Return per unit of total volatility	2.59	2.00	+0.59
Sortino ratio: Return per unit of downside risk	3.87	2.84	+1.03
Omega ratio: Gain probability vs. loss probability	1.49	1.37	+0.12
Calmar ratio: Return relative to maximum drawdown	3.26	2.68	+0.58
Martin ratio: Return relative to average drawdown	15.31	11.94	+3.37
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IDXGX vs. PTDIX - Sharpe Ratio Comparison

The current IDXGX Sharpe Ratio is 2.59, which is comparable to the PTDIX Sharpe Ratio of 2.00. The chart below compares the historical Sharpe Ratios of IDXGX 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

	IDXGX	PTDIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.59	2.00	+0.59
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.65	0.62	+0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.77	0.77	0.00
Sharpe Ratio (All Time) Calculated using the full available price history	0.83	0.48	+0.35

Drawdowns

IDXGX vs. PTDIX - Drawdown Comparison

The maximum IDXGX drawdown since its inception was -25.45%, smaller than the maximum PTDIX drawdown of -54.38%. Use the drawdown chart below to compare losses from any high point for IDXGX and PTDIX.

Drawdown Indicators

	IDXGX	PTDIX	Difference
Max Drawdown Largest peak-to-trough decline	-25.45%	-54.38%	+28.93%
Max Drawdown (1Y) Largest decline over 1 year	-6.57%	-7.32%	+0.75%
Max Drawdown (3Y) Largest decline over 3 years	-10.16%	-13.05%	+2.89%
Max Drawdown (5Y) Largest decline over 5 years	-22.44%	-25.43%	+2.99%
Max Drawdown (10Y) Largest decline over 10 years	-25.45%	-30.02%	+4.57%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-3.54%	-7.49%	+3.95%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.35%	1.64%	-0.29%

Volatility

IDXGX vs. PTDIX - Volatility Comparison

The current volatility for Voya Index Solution 2030 Portfolio (IDXGX) is 2.65%, while Principal LifeTime 2040 Fund (PTDIX) has a volatility of 2.89%. This indicates that IDXGX experiences smaller price fluctuations and is considered to be less risky than PTDIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IDXGX	PTDIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.65%	2.89%	-0.24%
Volatility (6M) Calculated over the trailing 6-month period	6.76%	7.85%	-1.09%
Volatility (1Y) Calculated over the trailing 1-year period	8.28%	9.81%	-1.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	10.83%	13.49%	-2.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	11.83%	13.83%	-2.00%

IDXGX vs. PTDIX - Expense Ratio Comparison

IDXGX has a 0.20% expense ratio, which is higher than PTDIX's 0.01% 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

IDXGX vs. PTDIX - Dividend Comparison

IDXGX's dividend yield for the trailing twelve months is around 2.47%, less than PTDIX's 9.09% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IDXGX Voya Index Solution 2030 Portfolio	2.47%	2.66%	1.42%	7.30%	12.39%	4.95%	4.22%	4.56%	3.86%	0.98%	0.16%	1.52%
PTDIX Principal LifeTime 2040 Fund	9.09%	9.80%	12.28%	4.40%	8.61%	8.92%	6.01%	7.26%	9.28%	6.07%	4.86%	6.73%

Frequently Asked Questions

Can I hold both IDXGX and PTDIX in my portfolio?

IDXGX and PTDIX have a correlation of 0.87, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IDXGX or PTDIX?

PTDIX has higher volatility (2.89%) compared to IDXGX (2.65%). In terms of maximum drawdown, IDXGX dropped -25.45% vs PTDIX's -54.38%.

Which has better risk-adjusted returns?

IDXGX currently has the higher Sharpe Ratio (2.59 vs 2.00), 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.