IDXLX vs. LTTIX

Last updated Jul 18, 2026

IDXLX (Voya Index Solution 2040 Portfolio) and LTTIX (MFS Lifetime 2025 Fund) are both Target Retirement Date funds. Their correlation of 0.91 suggests significant overlap in exposure. IDXLX charges 0.20%/yr vs 0.00%/yr for LTTIX.

Performance

IDXLX vs. LTTIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Index Solution 2040 Portfolio (IDXLX) and MFS Lifetime 2025 Fund (LTTIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

IDXLX

• 1D: -0.53%
• 1M: 0.41%
• 6M: 7.03%
• YTD: 9.54%
• 1Y: 18.86%
• 3Y*: 15.67%
• 5Y*: 8.75%
• 10Y*: 10.61%

LTTIX

• 1D: —
• 1M: —
• 6M: —
• YTD: —
• 1Y: —
• 3Y*: —
• 5Y*: —
• 10Y*: —

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

IDXLX vs. LTTIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IDXLX Voya Index Solution 2040 Portfolio	9.54%	18.90%	13.55%	18.84%	-17.96%	16.62%	15.65%	23.77%	-7.52%	19.68%
LTTIX MFS Lifetime 2025 Fund	2.74%	9.29%	6.73%	10.36%	-12.36%	8.61%	10.61%	17.82%	-3.97%	13.16%

Correlation

The correlation between IDXLX and LTTIX is 0.70, which is moderate. They share some common price drivers but move independently often enough to provide real diversification benefit when combined.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.70
Correlation (3Y) Calculated over the trailing 3-year period	0.80
Correlation (5Y) Calculated over the trailing 5-year period	0.86
Correlation (10Y) Calculated over the trailing 10-year period	0.89
Correlation (All Time) Calculated using the full available price history since Jan 2, 2013	0.91

Over the past year, the correlation between IDXLX and LTTIX has dropped to 0.70 - well below their long-term average of 0.91, suggesting their price drivers have been diverging.

Return for Risk

IDXLX vs. LTTIX — Risk / Return Rank

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

IDXLX

IDXLX Risk / Return Rank: 71
IDXLX Sharpe Ratio Rank: 69
IDXLX Sortino Ratio Rank: 70
IDXLX Omega Ratio Rank: 67
IDXLX Calmar Ratio Rank: 67
IDXLX Martin Ratio Rank: 81

LTTIX

Risk / return metrics aren't available yet — we need at least 12 months of trading data to calculate them.

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.

IDXLX vs. LTTIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Index Solution 2040 Portfolio (IDXLX) and MFS Lifetime 2025 Fund (LTTIX). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	IDXLX	LTTIX	Difference
Sharpe ratio: Return per unit of total volatility	1.87	—	—
Sortino ratio: Return per unit of downside risk	2.72	—	—
Omega ratio: Gain probability vs. loss probability	1.34	—	—
Calmar ratio: Return relative to maximum drawdown	2.58	—	—
Martin ratio: Return relative to average drawdown	11.75	—	—

Drawdowns

Drawdown Indicators

	IDXLX	LTTIX	Difference
Max Drawdown Largest peak-to-trough decline	-30.09%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-8.24%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-13.65%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-25.08%	—	—
Max Drawdown (10Y) Largest decline over 10 years	-30.09%	—	—
Current Drawdown Current decline from peak	-0.90%	—	—
Average Drawdown Average peak-to-trough decline	-4.07%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	1.74%	—	—

Volatility

Volatility by Period

	IDXLX	LTTIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.12%	—	—
Volatility (6M) Calculated over the trailing 6-month period	9.18%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	11.39%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	13.84%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	14.68%	—	—

IDXLX vs. LTTIX - Expense Ratio Comparison

IDXLX has a 0.20% expense ratio, which is higher than LTTIX's 0.00% 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

IDXLX vs. LTTIX - Dividend Comparison

IDXLX's dividend yield for the trailing twelve months is around 1.81%, less than LTTIX's 11.54% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IDXLX Voya Index Solution 2040 Portfolio	1.81%	1.99%	0.62%	8.23%	13.44%	4.59%	4.31%	4.56%	3.62%	1.03%	0.17%	5.83%
LTTIX MFS Lifetime 2025 Fund	11.54%	8.13%	7.07%	3.30%	5.88%	7.35%	2.83%	3.68%	4.32%	3.51%	4.03%	1.82%

Frequently Asked Questions

Can I hold both IDXLX and LTTIX in my portfolio?

IDXLX and LTTIX have a correlation of 0.70, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.