FMCSX vs. FSOPX

Last updated Jun 4, 2026

FMCSX (Fidelity Mid-Cap Stock Fund) and FSOPX (Fidelity Series Small Cap Opportunities Fund) are both mutual funds - FMCSX is a Mid Cap Blend Equities fund managed by Fidelity, while FSOPX is a Small Cap Blend Equities fund managed by Fidelity. Over the past 10 years, FMCSX returned 12.77%/yr vs 12.77%/yr for FSOPX. Their correlation of 0.93 suggests significant overlap in exposure. FMCSX charges 0.85%/yr vs 0.00%/yr for FSOPX.

Performance

FMCSX vs. FSOPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity Mid-Cap Stock Fund (FMCSX) and Fidelity Series Small Cap Opportunities Fund (FSOPX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with FMCSX having a 17.37% return and FSOPX slightly lower at 16.83%. Over a longer period, both investments have demonstrated similar performance, with their 10-year annualized returns being quite close: FMCSX at 12.77% and FSOPX at 12.77%.

FMCSX

• 1D: 1.64%
• 1M: 3.81%
• YTD: 17.37%
• 6M: 18.71%
• 1Y: 31.34%
• 3Y*: 18.53%
• 5Y*: 10.35%
• 10Y*: 12.77%

FSOPX

• 1D: 0.85%
• 1M: 1.12%
• YTD: 16.83%
• 6M: 15.66%
• 1Y: 40.89%
• 3Y*: 21.01%
• 5Y*: 11.01%
• 10Y*: 12.77%

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

FMCSX vs. FSOPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
FMCSX Fidelity Mid-Cap Stock Fund	17.37%	11.80%	14.55%	11.02%	-6.40%	28.64%	11.43%	25.39%	-6.67%	18.03%
FSOPX Fidelity Series Small Cap Opportunities Fund	16.83%	15.81%	15.31%	20.38%	-17.82%	23.39%	17.03%	29.92%	-8.12%	11.10%

Correlation

The correlation between FMCSX and FSOPX is 0.93, 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	0.93
Correlation (3Y) Calculated over the trailing 3-year period	0.93
Correlation (5Y) Calculated over the trailing 5-year period	0.94
Correlation (10Y) Calculated over the trailing 10-year period	0.93
Correlation (All Time) Calculated using the full available price history since Mar 26, 2007	0.93

The correlation between FMCSX and FSOPX has been stable across timeframes, ranging from 0.93 to 0.94 - a consistent structural relationship.

Return for Risk

FMCSX vs. FSOPX — Risk / Return Rank

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

FMCSX

FMCSX Risk / Return Rank: 62
FMCSX Sharpe Ratio Rank: 51
FMCSX Sortino Ratio Rank: 49
FMCSX Omega Ratio Rank: 46
FMCSX Calmar Ratio Rank: 83
FMCSX Martin Ratio Rank: 79

FSOPX

FSOPX Risk / Return Rank: 73
FSOPX Sharpe Ratio Rank: 69
FSOPX Sortino Ratio Rank: 66
FSOPX Omega Ratio Rank: 55
FSOPX Calmar Ratio Rank: 88
FSOPX Martin Ratio Rank: 87

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.

FMCSX vs. FSOPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity Mid-Cap Stock Fund (FMCSX) and Fidelity Series Small Cap Opportunities Fund (FSOPX). 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.

	FMCSX	FSOPX	Difference
Sharpe ratio: Return per unit of total volatility	2.10	2.42	-0.32
Sortino ratio: Return per unit of downside risk	2.95	3.41	-0.46
Omega ratio: Gain probability vs. loss probability	1.37	1.41	-0.04
Calmar ratio: Return relative to maximum drawdown	3.83	4.35	-0.52
Martin ratio: Return relative to average drawdown	14.86	17.03	-2.17
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

FMCSX vs. FSOPX - Sharpe Ratio Comparison

The current FMCSX Sharpe Ratio is 2.10, which is comparable to the FSOPX Sharpe Ratio of 2.42. The chart below compares the historical Sharpe Ratios of FMCSX and FSOPX, 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

	FMCSX	FSOPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.10	2.42	-0.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.59	0.51	+0.08
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.69	0.58	+0.11
Sharpe Ratio (All Time) Calculated using the full available price history	0.58	0.39	+0.19

Drawdowns

FMCSX vs. FSOPX - Drawdown Comparison

The maximum FMCSX drawdown since its inception was -62.19%, roughly equal to the maximum FSOPX drawdown of -61.75%. Use the drawdown chart below to compare losses from any high point for FMCSX and FSOPX.

Drawdown Indicators

	FMCSX	FSOPX	Difference
Max Drawdown Largest peak-to-trough decline	-62.19%	-61.75%	-0.44%
Max Drawdown (1Y) Largest decline over 1 year	-8.55%	-9.99%	+1.44%
Max Drawdown (3Y) Largest decline over 3 years	-22.33%	-27.17%	+4.84%
Max Drawdown (5Y) Largest decline over 5 years	-22.33%	-30.06%	+7.73%
Max Drawdown (10Y) Largest decline over 10 years	-40.55%	-39.15%	-1.40%
Current Drawdown Current decline from peak	0.00%	-1.66%	+1.66%
Average Drawdown Average peak-to-trough decline	-9.35%	-10.37%	+1.02%
Ulcer Index Depth and duration of drawdowns from previous peaks	2.20%	2.54%	-0.34%

Volatility

FMCSX vs. FSOPX - Volatility Comparison

Fidelity Mid-Cap Stock Fund (FMCSX) and Fidelity Series Small Cap Opportunities Fund (FSOPX) have volatilities of 5.04% and 5.26%, 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

	FMCSX	FSOPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	5.04%	5.26%	-0.22%
Volatility (6M) Calculated over the trailing 6-month period	12.28%	13.46%	-1.18%
Volatility (1Y) Calculated over the trailing 1-year period	15.58%	17.92%	-2.34%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.72%	21.70%	-3.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.60%	21.99%	-3.39%

FMCSX vs. FSOPX - Expense Ratio Comparison

FMCSX has a 0.85% expense ratio, which is higher than FSOPX's 0.00% expense ratio.

Dividends

FMCSX vs. FSOPX - Dividend Comparison

FMCSX's dividend yield for the trailing twelve months is around 1.56%, less than FSOPX's 3.78% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FMCSX Fidelity Mid-Cap Stock Fund	1.56%	1.83%	8.94%	2.60%	5.44%	12.80%	6.72%	6.63%	18.48%	6.66%	8.25%	14.18%
FSOPX Fidelity Series Small Cap Opportunities Fund	3.78%	4.41%	9.41%	0.98%	5.16%	30.85%	2.01%	6.67%	13.99%	10.31%	0.69%	5.93%

Frequently Asked Questions

Can I hold both FMCSX and FSOPX in my portfolio?

With a correlation of 0.93, FMCSX and FSOPX 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, FMCSX or FSOPX?

FSOPX has higher volatility (5.26%) compared to FMCSX (5.04%). In terms of maximum drawdown, FMCSX dropped -62.19% vs FSOPX's -61.75%.

Which has better risk-adjusted returns?

FSOPX currently has the higher Sharpe Ratio (2.42 vs 2.10), 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.