FIICX vs. FSMAX

Last updated Jun 5, 2026

FIICX (Fidelity Advisor Mid Cap II Fund Class C) and FSMAX (Fidelity Extended Market Index Fund) are both Mid Cap Blend Equities funds from Fidelity. Over the past 10 years, FIICX returned 11.12%/yr vs 12.06%/yr for FSMAX. Their correlation of 0.95 suggests significant overlap in exposure. FIICX charges 1.83%/yr vs 0.04%/yr for FSMAX.

Performance

FIICX vs. FSMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Advisor Mid Cap II Fund Class C (FIICX) and Fidelity Extended Market Index Fund (FSMAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FIICX achieves a 20.74% return, which is significantly higher than FSMAX's 13.74% return. Over the past 10 years, FIICX has underperformed FSMAX with an annualized return of 11.12%, while FSMAX has yielded a comparatively higher 12.06% annualized return.

FIICX

• 1D: -0.23%
• 1M: 2.15%
• YTD: 20.74%
• 6M: 20.72%
• 1Y: 37.25%
• 3Y*: 20.06%
• 5Y*: 9.92%
• 10Y*: 11.12%

FSMAX

• 1D: -1.00%
• 1M: 3.43%
• YTD: 13.74%
• 6M: 11.91%
• 1Y: 28.69%
• 3Y*: 19.73%
• 5Y*: 6.54%
• 10Y*: 12.06%

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

FIICX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FIICX Fidelity Advisor Mid Cap II Fund Class C	20.74%	5.27%	23.14%	13.72%	-15.74%	23.94%	17.35%	22.40%	-15.85%	19.33%
FSMAX Fidelity Extended Market Index Fund	13.74%	11.40%	16.99%	25.36%	-26.44%	12.41%	32.28%	28.01%	-9.44%	18.04%

Correlation

The correlation between FIICX and FSMAX is 0.92, 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	0.92
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.94
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.95

The correlation between FIICX and FSMAX has been stable across timeframes, ranging from 0.92 to 0.95 - a consistent structural relationship.

Return for Risk

FIICX vs. FSMAX — Risk / Return Rank

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

FIICX

FIICX Risk / Return Rank: 65
FIICX Sharpe Ratio Rank: 56
FIICX Sortino Ratio Rank: 52
FIICX Omega Ratio Rank: 51
FIICX Calmar Ratio Rank: 83
FIICX Martin Ratio Rank: 83

FSMAX

FSMAX Risk / Return Rank: 40
FSMAX Sharpe Ratio Rank: 34
FSMAX Sortino Ratio Rank: 32
FSMAX Omega Ratio Rank: 30
FSMAX Calmar Ratio Rank: 54
FSMAX Martin Ratio Rank: 48

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.

FIICX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Advisor Mid Cap II Fund Class C (FIICX) and Fidelity Extended Market Index Fund (FSMAX). 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.

	FIICX	FSMAX	Difference
Sharpe ratio: Return per unit of total volatility	2.16	1.69	+0.47
Sortino ratio: Return per unit of downside risk	2.97	2.38	+0.59
Omega ratio: Gain probability vs. loss probability	1.38	1.29	+0.09
Calmar ratio: Return relative to maximum drawdown	3.75	2.82	+0.93
Martin ratio: Return relative to average drawdown	14.98	9.96	+5.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FIICX vs. FSMAX - Sharpe Ratio Comparison

The current FIICX Sharpe Ratio is 2.16, which is comparable to the FSMAX Sharpe Ratio of 1.69. The chart below compares the historical Sharpe Ratios of FIICX and FSMAX, 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

	FIICX	FSMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.16	1.69	+0.47
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.48	0.29	+0.18
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.52	0.40	+0.12
Sharpe Ratio (All Time) Calculated using the full available price history	0.48	0.46	+0.03

Drawdowns

FIICX vs. FSMAX - Drawdown Comparison

The maximum FIICX drawdown since its inception was -53.75%, which is greater than FSMAX's maximum drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for FIICX and FSMAX.

Drawdown Indicators

	FIICX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-53.75%	-50.55%	-3.20%
Max Drawdown (1Y) Largest decline over 1 year	-9.86%	-10.26%	+0.40%
Max Drawdown (3Y) Largest decline over 3 years	-27.79%	-26.82%	-0.97%
Max Drawdown (5Y) Largest decline over 5 years	-27.79%	-36.31%	+8.52%
Max Drawdown (10Y) Largest decline over 10 years	-43.31%	-50.55%	+7.24%
Current Drawdown Current decline from peak	-0.23%	-1.00%	+0.77%
Average Drawdown Average peak-to-trough decline	-8.62%	-12.16%	+3.54%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.46%	2.90%	-0.44%

Volatility

FIICX vs. FSMAX - Volatility Comparison

Fidelity Advisor Mid Cap II Fund Class C (FIICX) and Fidelity Extended Market Index Fund (FSMAX) have volatilities of 4.96% and 4.84%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FIICX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.96%	4.84%	+0.12%
Volatility (6M) Calculated over the trailing 6-month period	13.74%	12.48%	+1.26%
Volatility (1Y) Calculated over the trailing 1-year period	17.15%	17.20%	-0.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	20.97%	22.33%	-1.36%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.31%	30.23%	-8.92%

FIICX vs. FSMAX - Expense Ratio Comparison

FIICX has a 1.83% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

Dividends

FIICX vs. FSMAX - Dividend Comparison

FIICX's dividend yield for the trailing twelve months is around 7.65%, more than FSMAX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FIICX Fidelity Advisor Mid Cap II Fund Class C	7.65%	8.11%	14.08%	2.98%	6.81%	21.73%	1.13%	3.23%	11.72%	8.22%	4.95%	5.19%
FSMAX Fidelity Extended Market Index Fund	0.50%	0.57%	0.48%	1.17%	1.90%	7.49%	2.14%	4.30%	6.09%	5.44%	4.85%	6.34%

Frequently Asked Questions

Can I hold both FIICX and FSMAX in my portfolio?

With a correlation of 0.92, FIICX and FSMAX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, FIICX or FSMAX?

FIICX has higher volatility (4.96%) compared to FSMAX (4.84%). In terms of maximum drawdown, FIICX dropped -53.75% vs FSMAX's -50.55%.

Which has better risk-adjusted returns?

FIICX currently has the higher Sharpe Ratio (2.16 vs 1.69), 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.