IPLIX vs. SSSYX

Last updated Jun 24, 2026

IPLIX (Voya Index Plus LargeCap Portfolio) and SSSYX (State Street Equity 500 Index Fund Class K) are both mutual funds - IPLIX is a Large Cap Blend Equities fund managed by Voya, while SSSYX is a S&P 500 fund tracking the S&P 500 Index. Over the past 10 years, IPLIX returned 14.95%/yr vs 45.70%/yr for SSSYX. With a 0.96 correlation, they move nearly in lockstep. IPLIX charges 0.55%/yr vs 0.02%/yr for SSSYX.

Performance

IPLIX vs. SSSYX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Index Plus LargeCap Portfolio (IPLIX) and State Street Equity 500 Index Fund Class K (SSSYX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with IPLIX having a 9.76% return and SSSYX slightly higher at 9.78%. Over the past 10 years, IPLIX has underperformed SSSYX with an annualized return of 14.95%, while SSSYX has yielded a comparatively higher 45.70% annualized return.

IPLIX

• 1D: -0.23%
• 1M: 0.53%
• YTD: 9.76%
• 6M: 8.53%
• 1Y: 24.51%
• 3Y*: 20.58%
• 5Y*: 12.73%
• 10Y*: 14.95%

SSSYX

• 1D: -0.36%
• 1M: 0.10%
• YTD: 9.78%
• 6M: 8.78%
• 1Y: 25.47%
• 3Y*: 21.36%
• 5Y*: 13.57%
• 10Y*: 45.70%

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

IPLIX vs. SSSYX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
IPLIX Voya Index Plus LargeCap Portfolio	9.76%	15.30%	25.20%	26.06%	-19.04%	29.01%	15.56%	29.67%	-6.79%	24.66%
SSSYX State Street Equity 500 Index Fund Class K	9.78%	17.81%	24.99%	26.27%	-18.16%	28.51%	1,083.11%	31.38%	-4.38%	21.61%

Correlation

The correlation between IPLIX and SSSYX is 0.88, 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	0.88
Correlation (3Y) Calculated over the trailing 3-year period	0.88
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 18, 2014	0.96

The correlation between IPLIX and SSSYX has been stable across timeframes, ranging from 0.88 to 0.96 - a consistent structural relationship.

Return for Risk

IPLIX vs. SSSYX — Risk / Return Rank

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

IPLIX

IPLIX Risk / Return Rank: 64
IPLIX Sharpe Ratio Rank: 58
IPLIX Sortino Ratio Rank: 57
IPLIX Omega Ratio Rank: 54
IPLIX Calmar Ratio Rank: 71
IPLIX Martin Ratio Rank: 78

SSSYX

SSSYX Risk / Return Rank: 65
SSSYX Sharpe Ratio Rank: 63
SSSYX Sortino Ratio Rank: 57
SSSYX Omega Ratio Rank: 59
SSSYX Calmar Ratio Rank: 68
SSSYX Martin Ratio Rank: 78

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.

IPLIX vs. SSSYX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Index Plus LargeCap Portfolio (IPLIX) and State Street Equity 500 Index Fund Class K (SSSYX). 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.

	IPLIX	SSSYX	Difference
Sharpe ratio: Return per unit of total volatility	2.06	2.15	-0.09
Sortino ratio: Return per unit of downside risk	2.90	2.91	0.00
Omega ratio: Gain probability vs. loss probability	1.37	1.39	-0.01
Calmar ratio: Return relative to maximum drawdown	3.13	3.02	+0.11
Martin ratio: Return relative to average drawdown	13.65	13.62	+0.03

IPLIX vs. SSSYX - Sharpe Ratio Comparison

The current IPLIX Sharpe Ratio is 2.06, which is comparable to the SSSYX Sharpe Ratio of 2.15. The chart below compares the historical Sharpe Ratios of IPLIX and SSSYX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

IPLIX vs. SSSYX - Drawdown Comparison

The maximum IPLIX drawdown since its inception was -51.01%, which is greater than SSSYX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for IPLIX and SSSYX.

Drawdown Indicators

	IPLIX	SSSYX	Difference
Max Drawdown Largest peak-to-trough decline	-51.01%	-33.77%	-17.24%
Max Drawdown (1Y) Largest decline over 1 year	-9.00%	-8.88%	-0.12%
Max Drawdown (3Y) Largest decline over 3 years	-19.56%	-18.74%	-0.82%
Max Drawdown (5Y) Largest decline over 5 years	-24.78%	-24.49%	-0.29%
Max Drawdown (10Y) Largest decline over 10 years	-35.40%	-33.77%	-1.63%
Current Drawdown Current decline from peak	-1.47%	-1.72%	+0.25%
Average Drawdown Average peak-to-trough decline	-9.94%	-3.91%	-6.03%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.98%	1.96%	+0.02%

Volatility

IPLIX vs. SSSYX - Volatility Comparison

Voya Index Plus LargeCap Portfolio (IPLIX) and State Street Equity 500 Index Fund Class K (SSSYX) have volatilities of 4.78% and 4.67%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	IPLIX	SSSYX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.78%	4.67%	+0.11%
Volatility (6M) Calculated over the trailing 6-month period	10.97%	9.83%	+1.14%
Volatility (1Y) Calculated over the trailing 1-year period	13.71%	12.49%	+1.22%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.89%	16.98%	+0.91%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.85%	121.18%	-102.33%

IPLIX vs. SSSYX - Expense Ratio Comparison

IPLIX has a 0.55% expense ratio, which is higher than SSSYX's 0.02% expense ratio.

Dividends

IPLIX vs. SSSYX - Dividend Comparison

IPLIX's dividend yield for the trailing twelve months is around 11.79%, more than SSSYX's 1.31% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
IPLIX Voya Index Plus LargeCap Portfolio	11.79%	10.85%	5.16%	2.88%	35.98%	7.06%	10.07%	9.90%	10.97%	3.12%	1.59%	1.61%
SSSYX State Street Equity 500 Index Fund Class K	1.31%	1.44%	1.63%	1.78%	2.16%	2.76%	1.86%	4.44%	5.18%	5.94%	2.07%	1.84%

Frequently Asked Questions

Can I hold both IPLIX and SSSYX in my portfolio?

IPLIX and SSSYX have a correlation of 0.88, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, IPLIX or SSSYX?

IPLIX has higher volatility (4.78%) compared to SSSYX (4.67%). In terms of maximum drawdown, IPLIX dropped -51.01% vs SSSYX's -33.77%.

Which has better risk-adjusted returns?

SSSYX currently has the higher Sharpe Ratio (2.15 vs 2.06), 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.