ISRIX vs. FDFIX

Last updated Jun 24, 2026

ISRIX (Voya Solution 2045 Portfolio) and FDFIX (Fidelity Flex 500 Index Fund) are both mutual funds - ISRIX is a Target Retirement Date fund managed by Voya, while FDFIX is a Large Cap Blend Equities fund tracking the Fidelity U.S. Large Cap Index. Over the past 5 years, ISRIX returned 9.38%/yr vs 13.07%/yr for FDFIX. Their correlation of 0.94 suggests significant overlap in exposure. ISRIX charges 0.17%/yr vs 0.00%/yr for FDFIX.

Performance

ISRIX vs. FDFIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Voya Solution 2045 Portfolio (ISRIX) and Fidelity Flex 500 Index Fund (FDFIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, ISRIX achieves a 11.09% return, which is significantly higher than FDFIX's 8.05% return.

ISRIX

• 1D: 0.00%
• 1M: 1.58%
• YTD: 11.09%
• 6M: 10.64%
• 1Y: 24.78%
• 3Y*: 18.39%
• 5Y*: 9.38%
• 10Y*: 11.65%

FDFIX

• 1D: -1.44%
• 1M: -1.13%
• YTD: 8.05%
• 6M: 6.74%
• 1Y: 21.91%
• 3Y*: 20.68%
• 5Y*: 13.07%
• 10Y*: —

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

ISRIX vs. FDFIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
ISRIX Voya Solution 2045 Portfolio	11.09%	19.58%	14.62%	20.30%	-19.03%	17.58%	16.62%	24.17%	-10.07%	15.82%
FDFIX Fidelity Flex 500 Index Fund	8.05%	17.59%	25.06%	26.27%	-18.10%	28.69%	18.46%	31.47%	-4.45%	14.41%

Correlation

The correlation between ISRIX and FDFIX 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 (All Time) Calculated using the full available price history since Mar 9, 2017	0.94

The correlation between ISRIX and FDFIX has been stable across timeframes, ranging from 0.87 to 0.94 - a consistent structural relationship.

Return for Risk

ISRIX vs. FDFIX — Risk / Return Rank

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

ISRIX

ISRIX Risk / Return Rank: 76
ISRIX Sharpe Ratio Rank: 76
ISRIX Sortino Ratio Rank: 76
ISRIX Omega Ratio Rank: 72
ISRIX Calmar Ratio Rank: 72
ISRIX Martin Ratio Rank: 84

FDFIX

FDFIX Risk / Return Rank: 49
FDFIX Sharpe Ratio Rank: 47
FDFIX Sortino Ratio Rank: 42
FDFIX Omega Ratio Rank: 44
FDFIX Calmar Ratio Rank: 51
FDFIX Martin Ratio Rank: 62

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.

ISRIX vs. FDFIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Voya Solution 2045 Portfolio (ISRIX) and Fidelity Flex 500 Index Fund (FDFIX). 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.

	ISRIX	FDFIX	Difference
Sharpe ratio: Return per unit of total volatility	2.34	1.85	+0.49
Sortino ratio: Return per unit of downside risk	3.33	2.52	+0.81
Omega ratio: Gain probability vs. loss probability	1.44	1.33	+0.10
Calmar ratio: Return relative to maximum drawdown	3.13	2.61	+0.52
Martin ratio: Return relative to average drawdown	14.64	11.45	+3.18

ISRIX vs. FDFIX - Sharpe Ratio Comparison

The current ISRIX Sharpe Ratio is 2.34, which is comparable to the FDFIX Sharpe Ratio of 1.85. The chart below compares the historical Sharpe Ratios of ISRIX and FDFIX, 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

ISRIX vs. FDFIX - Drawdown Comparison

The maximum ISRIX drawdown since its inception was -56.73%, which is greater than FDFIX's maximum drawdown of -33.77%. Use the drawdown chart below to compare losses from any high point for ISRIX and FDFIX.

Drawdown Indicators

	ISRIX	FDFIX	Difference
Max Drawdown Largest peak-to-trough decline	-56.73%	-33.77%	-22.96%
Max Drawdown (1Y) Largest decline over 1 year	-9.03%	-8.99%	-0.04%
Max Drawdown (3Y) Largest decline over 3 years	-15.00%	-18.76%	+3.76%
Max Drawdown (5Y) Largest decline over 5 years	-26.60%	-24.51%	-2.09%
Max Drawdown (10Y) Largest decline over 10 years	-33.74%	—	—
Current Drawdown Current decline from peak	-0.73%	-3.12%	+2.39%
Average Drawdown Average peak-to-trough decline	-8.46%	-4.56%	-3.90%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.86%	2.04%	-0.18%

Volatility

ISRIX vs. FDFIX - Volatility Comparison

The current volatility for Voya Solution 2045 Portfolio (ISRIX) is 4.52%, while Fidelity Flex 500 Index Fund (FDFIX) has a volatility of 5.03%. This indicates that ISRIX experiences smaller price fluctuations and is considered to be less risky than FDFIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	ISRIX	FDFIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.52%	5.03%	-0.51%
Volatility (6M) Calculated over the trailing 6-month period	9.93%	10.04%	-0.11%
Volatility (1Y) Calculated over the trailing 1-year period	12.11%	12.71%	-0.60%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.87%	17.06%	-2.19%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.91%	18.60%	-2.69%

ISRIX vs. FDFIX - Expense Ratio Comparison

ISRIX has a 0.17% expense ratio, which is higher than FDFIX'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

ISRIX vs. FDFIX - Dividend Comparison

ISRIX's dividend yield for the trailing twelve months is around 5.27%, more than FDFIX's 1.06% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FDFIX Fidelity Flex 500 Index Fund	1.06%	1.11%	1.26%	1.48%	1.70%	1.27%	1.52%	1.78%	2.16%	0.50%	0.00%	0.00%
ISRIX Voya Solution 2045 Portfolio	5.27%	5.85%	1.53%	8.18%	28.81%	9.05%	7.37%	11.50%	7.75%	3.80%	11.39%	21.72%

Frequently Asked Questions

Can I hold both ISRIX and FDFIX in my portfolio?

ISRIX and FDFIX 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, ISRIX or FDFIX?

FDFIX has higher volatility (5.03%) compared to ISRIX (4.52%). In terms of maximum drawdown, ISRIX dropped -56.73% vs FDFIX's -33.77%.

Which has better risk-adjusted returns?

ISRIX currently has the higher Sharpe Ratio (2.34 vs 1.85), 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.