IISPX vs. LTIUX

Last updated Jun 4, 2026

IISPX (Voya Solution 2055 Portfolio) and LTIUX (Principal LifeTime 2035 Fund) are both Target Retirement Date funds. Over the past 10 years, IISPX returned 11.59%/yr vs 9.59%/yr for LTIUX. With a 0.97 correlation, they move nearly in lockstep. IISPX charges 0.19%/yr vs 0.01%/yr for LTIUX.

Performance

IISPX vs. LTIUX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Solution 2055 Portfolio (IISPX) and Principal LifeTime 2035 Fund (LTIUX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, IISPX achieves a 12.81% return, which is significantly higher than LTIUX's 6.70% return. Over the past 10 years, IISPX has outperformed LTIUX with an annualized return of 11.59%, while LTIUX has yielded a comparatively lower 9.59% annualized return.

IISPX

• 1D: 0.38%
• 1M: 5.91%
• YTD: 12.81%
• 6M: 13.61%
• 1Y: 28.47%
• 3Y*: 19.80%
• 5Y*: 10.03%
• 10Y*: 11.59%

LTIUX

• 1D: 0.28%
• 1M: 3.36%
• YTD: 6.70%
• 6M: 6.91%
• 1Y: 17.03%
• 3Y*: 14.87%
• 5Y*: 7.01%
• 10Y*: 9.59%

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

IISPX vs. LTIUX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IISPX Voya Solution 2055 Portfolio	12.81%	20.07%	15.30%	20.87%	-19.26%	17.64%	16.42%	24.65%	-10.28%	21.95%
LTIUX Principal LifeTime 2035 Fund	6.70%	14.26%	14.13%	16.51%	-17.48%	14.07%	15.70%	23.48%	-7.37%	19.69%

Correlation

The correlation between IISPX and LTIUX 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	0.92
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Mar 9, 2010	0.97

The correlation between IISPX and LTIUX has been stable across timeframes, ranging from 0.87 to 0.97 - a consistent structural relationship.

Return for Risk

IISPX vs. LTIUX — Risk / Return Rank

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

IISPX

IISPX Risk / Return Rank: 77
IISPX Sharpe Ratio Rank: 79
IISPX Sortino Ratio Rank: 77
IISPX Omega Ratio Rank: 73
IISPX Calmar Ratio Rank: 72
IISPX Martin Ratio Rank: 85

LTIUX

LTIUX Risk / Return Rank: 50
LTIUX Sharpe Ratio Rank: 47
LTIUX Sortino Ratio Rank: 48
LTIUX Omega Ratio Rank: 49
LTIUX Calmar Ratio Rank: 49
LTIUX Martin Ratio Rank: 59

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.

IISPX vs. LTIUX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Solution 2055 Portfolio (IISPX) and Principal LifeTime 2035 Fund (LTIUX). 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.

	IISPX	LTIUX	Difference
Sharpe ratio Return per unit of total volatility	2.60	2.03	+0.58
Sortino ratio Return per unit of downside risk	3.71	2.91	+0.80
Omega ratio Gain probability vs. loss probability	1.48	1.38	+0.10
Calmar ratio Return relative to maximum drawdown	3.32	2.66	+0.66
Martin ratio Return relative to average drawdown	16.09	11.84	+4.25
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

IISPX vs. LTIUX - Sharpe Ratio Comparison

The current IISPX Sharpe Ratio is 2.60, which is comparable to the LTIUX Sharpe Ratio of 2.03. The chart below compares the historical Sharpe Ratios of IISPX and LTIUX, 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

	IISPX	LTIUX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.60	2.03	+0.58
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.67	0.60	+0.07
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.72	0.77	-0.05
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.48	+0.17

Drawdowns

IISPX vs. LTIUX - Drawdown Comparison

The maximum IISPX drawdown since its inception was -34.45%, smaller than the maximum LTIUX drawdown of -49.65%. Use the drawdown chart below to compare losses from any high point for IISPX and LTIUX.

Drawdown Indicators

	IISPX	LTIUX	Difference
Max Drawdown Largest peak-to-trough decline	-34.45%	-49.65%	+15.20%
Max Drawdown (1Y) Largest decline over 1 year	-9.51%	-6.57%	-2.94%
Max Drawdown (3Y) Largest decline over 3 years	-15.98%	-11.08%	-4.90%
Max Drawdown (5Y) Largest decline over 5 years	-27.04%	-24.23%	-2.81%
Max Drawdown (10Y) Largest decline over 10 years	-34.45%	-28.12%	-6.33%
Current Drawdown Current decline from peak	0.00%	0.00%	0.00%
Average Drawdown Average peak-to-trough decline	-4.94%	-6.71%	+1.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.89%	1.47%	+0.42%

Volatility

IISPX vs. LTIUX - Volatility Comparison

Voya Solution 2055 Portfolio (IISPX) has a higher volatility of 3.49% compared to Principal LifeTime 2035 Fund (LTIUX) at 2.62%. This indicates that IISPX's price experiences larger fluctuations and is considered to be riskier than LTIUX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IISPX	LTIUX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.49%	2.62%	+0.87%
Volatility (6M) Calculated over the trailing 6-month period	9.88%	6.96%	+2.92%
Volatility (1Y) Calculated over the trailing 1-year period	12.14%	8.62%	+3.52%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.40%	11.83%	+3.57%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.37%	12.49%	+3.88%

IISPX vs. LTIUX - Expense Ratio Comparison

IISPX has a 0.19% expense ratio, which is higher than LTIUX'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

IISPX vs. LTIUX - Dividend Comparison

IISPX's dividend yield for the trailing twelve months is around 7.61%, less than LTIUX's 8.46% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IISPX Voya Solution 2055 Portfolio	7.61%	8.58%	1.54%	5.14%	29.36%	14.46%	6.23%	10.08%	5.84%	2.98%	8.44%	13.57%
LTIUX Principal LifeTime 2035 Fund	8.46%	9.03%	9.46%	4.17%	7.50%	7.06%	5.35%	7.28%	7.75%	5.46%	4.28%	5.59%

Frequently Asked Questions

Can I hold both IISPX and LTIUX in my portfolio?

IISPX and LTIUX 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, IISPX or LTIUX?

IISPX has higher volatility (3.49%) compared to LTIUX (2.62%). In terms of maximum drawdown, IISPX dropped -34.45% vs LTIUX's -49.65%.

Which has better risk-adjusted returns?

IISPX currently has the higher Sharpe Ratio (2.60 vs 2.03), 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.