FIRSX vs. ISOLX

Last updated Jul 22, 2026

FIRSX (Fidelity Managed Retirement 2015 Fund) and ISOLX (Voya Target In-Retirement Fund) are both Target Retirement Date funds. Their correlation of 0.91 suggests significant overlap in exposure. FIRSX charges 0.46%/yr vs 0.20%/yr for ISOLX.

Performance

FIRSX vs. ISOLX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Managed Retirement 2015 Fund (FIRSX) and Voya Target In-Retirement Fund (ISOLX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

FIRSX

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

ISOLX

• 1D: -0.25%
• 1M: -1.09%
• 6M: 3.69%
• YTD: 3.88%
• 1Y: 9.45%
• 3Y*: 8.92%
• 5Y*: 3.71%
• 10Y*: 5.34%
• ALL TIME*: 5.35%

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

FIRSX vs. ISOLX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FIRSX Fidelity Managed Retirement 2015 Fund	4.25%	11.12%	5.17%	9.63%	-13.52%	5.32%	10.88%	14.45%	-3.68%	12.08%
ISOLX Voya Target In-Retirement Fund	3.88%	11.96%	7.03%	11.13%	-14.97%	6.53%	10.46%	14.40%	-2.96%	9.49%

Correlation

The correlation between FIRSX and ISOLX is 0.82, 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	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.92
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Dec 24, 2012	0.91

The correlation between FIRSX and ISOLX shifts across timeframes, from 0.82 (1 year) to 0.92 (5 years), reflecting how their relationship changes across market environments.

Return for Risk

FIRSX vs. ISOLX — Risk / Return Rank

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

FIRSX

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

ISOLX

ISOLX Risk / Return Rank: 71
ISOLX Sharpe Ratio Rank: 71
ISOLX Sortino Ratio Rank: 74
ISOLX Omega Ratio Rank: 71
ISOLX Calmar Ratio Rank: 64
ISOLX Martin Ratio Rank: 75

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.

FIRSX vs. ISOLX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Managed Retirement 2015 Fund (FIRSX) and Voya Target In-Retirement Fund (ISOLX). 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.

	FIRSX	ISOLX	Difference
Sharpe ratio: Return per unit of total volatility	—	1.78	—
Sortino ratio: Return per unit of downside risk	—	2.68	—
Omega ratio: Gain probability vs. loss probability	—	1.33	—
Calmar ratio: Return relative to maximum drawdown	—	2.34	—
Martin ratio: Return relative to average drawdown	—	10.21	—

Drawdowns

Drawdown Indicators

	FIRSX	ISOLX	Difference
Max Drawdown Largest peak-to-trough decline	—	-19.02%	—
Max Drawdown (1Y) Largest decline over 1 year	—	-4.54%	—
Max Drawdown (3Y) Largest decline over 3 years	—	-6.27%	—
Max Drawdown (5Y) Largest decline over 5 years	—	-19.02%	—
Max Drawdown (10Y) Largest decline over 10 years	—	-19.02%	—
Current Drawdown Current decline from peak	—	-1.34%	—
Average Drawdown Average peak-to-trough decline	—	-2.80%	—
Ulcer Index Depth and duration of drawdowns from previous peaks	—	1.00%	—

Volatility

Volatility by Period

	FIRSX	ISOLX	Difference
Volatility (1M) Calculated over the trailing 1-month period	—	1.62%	—
Volatility (6M) Calculated over the trailing 6-month period	—	4.90%	—
Volatility (1Y) Calculated over the trailing 1-year period	—	6.00%	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	—	7.10%	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	—	6.59%	—

FIRSX vs. ISOLX - Expense Ratio Comparison

FIRSX has a 0.46% expense ratio, which is higher than ISOLX's 0.20% expense ratio.

Dividends

FIRSX vs. ISOLX - Dividend Comparison

FIRSX's dividend yield for the trailing twelve months is around 2.95%, less than ISOLX's 3.74% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIRSX Fidelity Managed Retirement 2015 Fund	2.95%	3.01%	2.89%	2.68%	4.92%	5.21%	3.39%	3.24%	6.33%	24.28%	2.04%	4.48%
ISOLX Voya Target In-Retirement Fund	3.74%	3.89%	2.37%	3.10%	3.50%	10.09%	3.54%	6.63%	3.53%	4.60%	2.06%	0.30%

Frequently Asked Questions

Can I hold both FIRSX and ISOLX in my portfolio?

FIRSX and ISOLX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.