FNSBX vs. FIRMX

Last updated Jul 18, 2026

FNSBX (Fidelity Freedom 2050 Fund Class K) and FIRMX (Fidelity Managed Retirement Income Fund) are both Target Retirement Date funds. A 0.75 correlation means they provide meaningful diversification when combined. FNSBX charges 0.65%/yr vs 0.45%/yr for FIRMX.

Performance

FNSBX vs. FIRMX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Freedom 2050 Fund Class K (FNSBX) and Fidelity Managed Retirement Income Fund (FIRMX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

FNSBX

• 1D: -0.79%
• 1M: -0.40%
• 6M: 9.18%
• YTD: 12.62%
• 1Y: 24.03%
• 3Y*: 18.60%
• 5Y*: 10.39%
• 10Y*: —

FIRMX

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

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

FNSBX vs. FIRMX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FNSBX Fidelity Freedom 2050 Fund Class K	12.62%	23.79%	14.17%	20.64%	-18.25%	16.67%	18.43%	25.49%	-8.83%	7.36%
FIRMX Fidelity Managed Retirement Income Fund	3.60%	9.95%	4.29%	8.07%	-11.66%	2.77%	8.57%	10.57%	-1.80%	2.60%

Correlation

The correlation between FNSBX and FIRMX is 0.80, 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	0.80
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.74
Correlation (All Time) Calculated using the full available price history since Jul 25, 2017	0.75

The correlation between FNSBX and FIRMX has been stable across timeframes, ranging from 0.74 to 0.80 - a consistent structural relationship.

Return for Risk

FNSBX vs. FIRMX — Risk / Return Rank

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

FNSBX

FNSBX Risk / Return Rank: 63
FNSBX Sharpe Ratio Rank: 59
FNSBX Sortino Ratio Rank: 56
FNSBX Omega Ratio Rank: 58
FNSBX Calmar Ratio Rank: 65
FNSBX Martin Ratio Rank: 74

FIRMX

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.

FNSBX vs. FIRMX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Freedom 2050 Fund Class K (FNSBX) and Fidelity Managed Retirement Income Fund (FIRMX). 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.

	FNSBX	FIRMX	Difference
Sharpe ratio: Return per unit of total volatility	1.79	—	—
Sortino ratio: Return per unit of downside risk	2.47	—	—
Omega ratio: Gain probability vs. loss probability	1.33	—	—
Calmar ratio: Return relative to maximum drawdown	2.58	—	—
Martin ratio: Return relative to average drawdown	11.06	—	—

Drawdowns

Drawdown Indicators

	FNSBX	FIRMX	Difference
Max Drawdown Largest peak-to-trough decline	-30.88%	—	—
Max Drawdown (1Y) Largest decline over 1 year	-9.66%	—	—
Max Drawdown (3Y) Largest decline over 3 years	-15.39%	—	—
Max Drawdown (5Y) Largest decline over 5 years	-27.28%	—	—
Current Drawdown Current decline from peak	-1.84%	—	—
Average Drawdown Average peak-to-trough decline	-5.54%	—	—
Ulcer Index Depth and duration of drawdowns from previous peaks	2.24%	—	—

Volatility

Volatility by Period

	FNSBX	FIRMX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.32%	—	—
Volatility (6M) Calculated over the trailing 6-month period	11.94%	—	—
Volatility (1Y) Calculated over the trailing 1-year period	13.94%	—	—
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.24%	—	—
Volatility (10Y) Calculated over the trailing 10-year period, annualized	16.00%	—	—

FNSBX vs. FIRMX - Expense Ratio Comparison

FNSBX has a 0.65% expense ratio, which is higher than FIRMX's 0.45% expense ratio.

Dividends

FNSBX vs. FIRMX - Dividend Comparison

FNSBX's dividend yield for the trailing twelve months is around 5.33%, more than FIRMX's 3.12% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIRMX Fidelity Managed Retirement Income Fund	3.12%	3.13%	3.02%	2.81%	4.54%	3.56%	2.48%	2.59%	4.65%	8.57%	1.67%	1.68%
FNSBX Fidelity Freedom 2050 Fund Class K	5.33%	4.15%	2.13%	1.92%	11.92%	11.83%	4.99%	6.57%	7.80%	2.86%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FNSBX and FIRMX in my portfolio?

FNSBX and FIRMX have a correlation of 0.80, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.