FNSBX vs. FSKAX

Last updated Apr 2, 2026

Compare and contrast key facts about Fidelity Freedom 2050 Fund Class K (FNSBX) and Fidelity Total Market Index Fund (FSKAX).

FNSBX is managed by Fidelity. It was launched on Jul 20, 2017. FSKAX is managed by Fidelity.

Performance

FNSBX vs. FSKAX - Performance Comparison

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

FNSBX vs. FSKAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FNSBX Fidelity Freedom 2050 Fund Class K	-0.43%	23.79%	14.17%	20.64%	-18.25%	16.67%	18.43%	25.49%	-8.83%	7.36%
FSKAX Fidelity Total Market Index Fund	-3.98%	17.06%	23.89%	26.12%	-19.53%	25.66%	20.79%	30.92%	-5.32%	8.66%

Returns By Period

In the year-to-date period, FNSBX achieves a -0.43% return, which is significantly higher than FSKAX's -3.98% return.

FNSBX

• 1D: 3.07%
• 1M: -5.74%
• YTD: -0.43%
• 6M: 3.05%
• 1Y: 22.54%
• 3Y*: 16.61%
• 5Y*: 8.62%
• 10Y*: —

FSKAX

• 1D: 2.99%
• 1M: -5.06%
• YTD: -3.98%
• 6M: -2.04%
• 1Y: 17.68%
• 3Y*: 17.87%
• 5Y*: 10.50%
• 10Y*: 13.56%

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

FNSBX vs. FSKAX - Expense Ratio Comparison

FNSBX has a 0.65% expense ratio, which is higher than FSKAX's 0.02% expense ratio.

FNSBX

Fidelity Freedom 2050 Fund Class K

FSKAX

Fidelity Total Market Index Fund

Return for Risk

FNSBX vs. FSKAX — Risk / Return Rank

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

FNSBX

FNSBX Risk / Return Rank: 78
FNSBX Sharpe Ratio Rank: 77
FNSBX Sortino Ratio Rank: 79
FNSBX Omega Ratio Rank: 77
FNSBX Calmar Ratio Rank: 76
FNSBX Martin Ratio Rank: 81

FSKAX

FSKAX Risk / Return Rank: 59
FSKAX Sharpe Ratio Rank: 48
FSKAX Sortino Ratio Rank: 53
FSKAX Omega Ratio Rank: 55
FSKAX Calmar Ratio Rank: 64
FSKAX 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.

FNSBX vs. FSKAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Freedom 2050 Fund Class K (FNSBX) and Fidelity Total Market Index Fund (FSKAX). 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.

	FNSBX	FSKAX	Difference
Sharpe ratio Return per unit of total volatility	1.45	0.98	+0.47
Sortino ratio Return per unit of downside risk	2.05	1.49	+0.56
Omega ratio Gain probability vs. loss probability	1.31	1.23	+0.08
Calmar ratio Return relative to maximum drawdown	1.89	1.50	+0.39
Martin ratio Return relative to average drawdown	8.38	7.20	+1.18
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FNSBX vs. FSKAX - Sharpe Ratio Comparison

The current FNSBX Sharpe Ratio is 1.45, which is higher than the FSKAX Sharpe Ratio of 0.98. The chart below compares the historical Sharpe Ratios of FNSBX and FSKAX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	FNSBX	FSKAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.45	0.98	+0.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.58	0.61	-0.02
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.74	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.65	0.79	-0.14

Correlation

The correlation between FNSBX and FSKAX is 0.94, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

FNSBX vs. FSKAX - Dividend Comparison

FNSBX's dividend yield for the trailing twelve months is around 4.17%, more than FSKAX's 1.06% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FNSBX Fidelity Freedom 2050 Fund Class K	4.17%	4.15%	2.13%	1.92%	11.92%	11.83%	4.99%	6.57%	7.80%	2.86%	0.00%	0.00%
FSKAX Fidelity Total Market Index Fund	1.06%	1.01%	1.19%	1.41%	1.62%	1.15%	1.45%	1.94%	2.54%	2.07%	2.43%	0.82%

Drawdowns

FNSBX vs. FSKAX - Drawdown Comparison

The maximum FNSBX drawdown since its inception was -30.88%, smaller than the maximum FSKAX drawdown of -35.01%. Use the drawdown chart below to compare losses from any high point for FNSBX and FSKAX.

Drawdown Indicators

	FNSBX	FSKAX	Difference
Max Drawdown Largest peak-to-trough decline	-30.88%	-35.01%	+4.13%
Max Drawdown (1Y) Largest decline over 1 year	-11.16%	-12.42%	+1.26%
Max Drawdown (5Y) Largest decline over 5 years	-27.28%	-25.39%	-1.89%
Max Drawdown (10Y) Largest decline over 10 years	—	-35.01%	—
Current Drawdown Current decline from peak	-6.89%	-6.20%	-0.69%
Average Drawdown Average peak-to-trough decline	-5.69%	-4.05%	-1.64%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.52%	2.60%	-0.08%

Volatility

FNSBX vs. FSKAX - Volatility Comparison

Fidelity Freedom 2050 Fund Class K (FNSBX) has a higher volatility of 6.55% compared to Fidelity Total Market Index Fund (FSKAX) at 5.52%. This indicates that FNSBX's price experiences larger fluctuations and is considered to be riskier than FSKAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FNSBX	FSKAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.55%	5.52%	+1.03%
Volatility (6M) Calculated over the trailing 6-month period	9.89%	9.85%	+0.04%
Volatility (1Y) Calculated over the trailing 1-year period	16.16%	18.69%	-2.53%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	14.91%	17.42%	-2.51%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	15.98%	18.44%	-2.46%