FIBUX vs. FBGKX

Last updated Jun 4, 2026

FIBUX (Fidelity Flex U.S. Bond Index Fund) and FBGKX (Fidelity Blue Chip Growth Fund Class K) are both mutual funds - FIBUX is a Total Bond Market fund managed by Fidelity, while FBGKX is a Large Cap Growth Equities fund managed by Fidelity. Over the past 5 years, FIBUX returned 0.09%/yr vs 17.17%/yr for FBGKX. At a 0.01 correlation, their price movements are largely independent. FIBUX charges 0.00%/yr vs 0.68%/yr for FBGKX.

Performance

FIBUX vs. FBGKX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Flex U.S. Bond Index Fund (FIBUX) and Fidelity Blue Chip Growth Fund Class K (FBGKX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FIBUX achieves a 0.46% return, which is significantly lower than FBGKX's 18.59% return.

FIBUX

• 1D: 0.00%
• 1M: 0.46%
• YTD: 0.46%
• 6M: 0.33%
• 1Y: 5.40%
• 3Y*: 4.04%
• 5Y*: 0.09%
• 10Y*: —

FBGKX

• 1D: 0.76%
• 1M: 9.11%
• YTD: 18.59%
• 6M: 19.80%
• 1Y: 45.08%
• 3Y*: 32.64%
• 5Y*: 17.17%
• 10Y*: 21.98%

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

FIBUX vs. FBGKX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FIBUX Fidelity Flex U.S. Bond Index Fund	0.46%	7.20%	1.31%	5.46%	-13.41%	-2.16%	7.08%	8.58%	0.12%	3.81%
FBGKX Fidelity Blue Chip Growth Fund Class K	18.59%	19.99%	39.87%	55.76%	-38.40%	22.74%	62.35%	33.56%	1.11%	23.99%

Correlation

The correlation between FIBUX and FBGKX is 0.15, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.15
Correlation (3Y) Calculated over the trailing 3-year period	0.12
Correlation (5Y) Calculated over the trailing 5-year period	0.10
Correlation (All Time) Calculated using the full available price history since Mar 10, 2017	0.01

The correlation between FIBUX and FBGKX shifts across timeframes, from 0.01 (all time) to 0.15 (1 year), reflecting how their relationship changes across market environments.

Return for Risk

FIBUX vs. FBGKX — Risk / Return Rank

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

FIBUX

FIBUX Risk / Return Rank: 23
FIBUX Sharpe Ratio Rank: 23
FIBUX Sortino Ratio Rank: 24
FIBUX Omega Ratio Rank: 22
FIBUX Calmar Ratio Rank: 24
FIBUX Martin Ratio Rank: 21

FBGKX

FBGKX Risk / Return Rank: 76
FBGKX Sharpe Ratio Rank: 83
FBGKX Sortino Ratio Rank: 68
FBGKX Omega Ratio Rank: 65
FBGKX Calmar Ratio Rank: 81
FBGKX Martin Ratio Rank: 83

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.

FIBUX vs. FBGKX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Flex U.S. Bond Index Fund (FIBUX) and Fidelity Blue Chip Growth Fund Class K (FBGKX). 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.

	FIBUX	FBGKX	Difference
Sharpe ratio Return per unit of total volatility	1.36	2.68	-1.32
Sortino ratio Return per unit of downside risk	2.03	3.43	-1.40
Omega ratio Gain probability vs. loss probability	1.24	1.45	-0.21
Calmar ratio Return relative to maximum drawdown	1.83	3.70	-1.87
Martin ratio Return relative to average drawdown	5.45	15.65	-10.20
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FIBUX vs. FBGKX - Sharpe Ratio Comparison

The current FIBUX Sharpe Ratio is 1.36, which is lower than the FBGKX Sharpe Ratio of 2.68. The chart below compares the historical Sharpe Ratios of FIBUX and FBGKX, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Sharpe Ratios by Period

	FIBUX	FBGKX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.36	2.68	-1.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.02	0.69	-0.68
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.93	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.35	0.70	-0.35

Drawdowns

FIBUX vs. FBGKX - Drawdown Comparison

The maximum FIBUX drawdown since its inception was -19.76%, smaller than the maximum FBGKX drawdown of -48.90%. Use the drawdown chart below to compare losses from any high point for FIBUX and FBGKX.

Drawdown Indicators

	FIBUX	FBGKX	Difference
Max Drawdown Largest peak-to-trough decline	-19.76%	-48.90%	+29.14%
Max Drawdown (1Y) Largest decline over 1 year	-2.97%	-12.63%	+9.66%
Max Drawdown (3Y) Largest decline over 3 years	-6.09%	-27.06%	+20.97%
Max Drawdown (5Y) Largest decline over 5 years	-18.40%	-43.03%	+24.63%
Max Drawdown (10Y) Largest decline over 10 years	—	-43.03%	—
Current Drawdown Current decline from peak	-3.43%	0.00%	-3.43%
Average Drawdown Average peak-to-trough decline	-5.79%	-8.36%	+2.57%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.00%	2.98%	-1.98%

Volatility

FIBUX vs. FBGKX - Volatility Comparison

The current volatility for Fidelity Flex U.S. Bond Index Fund (FIBUX) is 1.38%, while Fidelity Blue Chip Growth Fund Class K (FBGKX) has a volatility of 4.15%. This indicates that FIBUX experiences smaller price fluctuations and is considered to be less risky than FBGKX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FIBUX	FBGKX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.38%	4.15%	-2.77%
Volatility (6M) Calculated over the trailing 6-month period	2.86%	13.01%	-10.15%
Volatility (1Y) Calculated over the trailing 1-year period	4.02%	17.47%	-13.45%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	6.04%	24.87%	-18.83%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.11%	23.68%	-18.57%

FIBUX vs. FBGKX - Expense Ratio Comparison

FIBUX has a 0.00% expense ratio, which is lower than FBGKX's 0.68% expense ratio.

Dividends

FIBUX vs. FBGKX - Dividend Comparison

FIBUX's dividend yield for the trailing twelve months is around 4.08%, more than FBGKX's 1.59% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FBGKX Fidelity Blue Chip Growth Fund Class K	1.59%	1.89%	6.00%	0.93%	0.56%	8.77%	6.41%	3.70%	6.41%	4.26%	4.22%	5.36%
FIBUX Fidelity Flex U.S. Bond Index Fund	4.08%	3.95%	3.65%	2.93%	1.62%	1.18%	2.32%	2.96%	2.70%	2.45%	0.00%	0.00%

Frequently Asked Questions

Can I hold both FIBUX and FBGKX in my portfolio?

FIBUX and FBGKX have a correlation of 0.15, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FIBUX or FBGKX?

FBGKX has higher volatility (4.15%) compared to FIBUX (1.38%). In terms of maximum drawdown, FIBUX dropped -19.76% vs FBGKX's -48.90%.

Which has better risk-adjusted returns?

FBGKX currently has the higher Sharpe Ratio (2.68 vs 1.36), 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.