JANEX vs. FSMAX

Last updated Jun 5, 2026

JANEX (Janus Henderson Enterprise Fund) and FSMAX (Fidelity Extended Market Index Fund) are both mutual funds - JANEX is a Mid Cap Growth Equities fund managed by Janus Henderson, while FSMAX is a Mid Cap Blend Equities fund tracking the Dow Jones U.S. Completion Total Stock Market Index. Over the past 10 years, JANEX returned 12.65%/yr vs 12.06%/yr for FSMAX. Their correlation of 0.93 suggests significant overlap in exposure. JANEX charges 0.79%/yr vs 0.04%/yr for FSMAX.

Performance

JANEX vs. FSMAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Janus Henderson Enterprise Fund (JANEX) 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, JANEX achieves a 6.84% return, which is significantly lower than FSMAX's 13.74% return. Both investments have delivered pretty close results over the past 10 years, with JANEX having a 12.65% annualized return and FSMAX not far behind at 12.06%.

JANEX

• 1D: 0.25%
• 1M: 5.16%
• YTD: 6.84%
• 6M: 6.66%
• 1Y: 13.68%
• 3Y*: 13.02%
• 5Y*: 7.16%
• 10Y*: 12.65%

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)

JANEX vs. FSMAX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
JANEX Janus Henderson Enterprise Fund	6.84%	7.64%	15.25%	17.99%	-16.03%	17.02%	20.38%	35.22%	-0.95%	26.36%
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 JANEX and FSMAX is 0.91, 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	0.91
Correlation (3Y) Calculated over the trailing 3-year period	0.91
Correlation (5Y) Calculated over the trailing 5-year period	0.93
Correlation (10Y) Calculated over the trailing 10-year period	0.92
Correlation (All Time) Calculated using the full available price history since Sep 9, 2011	0.93

The correlation between JANEX and FSMAX has been stable across timeframes, ranging from 0.91 to 0.93 - a consistent structural relationship.

Return for Risk

JANEX vs. FSMAX — Risk / Return Rank

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

JANEX

JANEX Risk / Return Rank: 14
JANEX Sharpe Ratio Rank: 14
JANEX Sortino Ratio Rank: 14
JANEX Omega Ratio Rank: 13
JANEX Calmar Ratio Rank: 14
JANEX Martin Ratio Rank: 16

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.

JANEX vs. FSMAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Janus Henderson Enterprise Fund (JANEX) 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.

	JANEX	FSMAX	Difference
Sharpe ratio: Return per unit of total volatility	1.03	1.69	-0.66
Sortino ratio: Return per unit of downside risk	1.55	2.38	-0.82
Omega ratio: Gain probability vs. loss probability	1.18	1.29	-0.11
Calmar ratio: Return relative to maximum drawdown	1.24	2.82	-1.58
Martin ratio: Return relative to average drawdown	4.30	9.96	-5.65
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

JANEX vs. FSMAX - Sharpe Ratio Comparison

The current JANEX Sharpe Ratio is 1.03, which is lower than the FSMAX Sharpe Ratio of 1.69. The chart below compares the historical Sharpe Ratios of JANEX 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

	JANEX	FSMAX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.03	1.69	-0.66
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.41	0.29	+0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.68	0.40	+0.28
Sharpe Ratio (All Time) Calculated using the full available price history	0.45	0.46	-0.01

Drawdowns

JANEX vs. FSMAX - Drawdown Comparison

The maximum JANEX drawdown since its inception was -79.85%, which is greater than FSMAX's maximum drawdown of -50.55%. Use the drawdown chart below to compare losses from any high point for JANEX and FSMAX.

Drawdown Indicators

	JANEX	FSMAX	Difference
Max Drawdown Largest peak-to-trough decline	-79.85%	-50.55%	-29.30%
Max Drawdown (1Y) Largest decline over 1 year	-11.40%	-10.26%	-1.14%
Max Drawdown (3Y) Largest decline over 3 years	-19.57%	-26.82%	+7.25%
Max Drawdown (5Y) Largest decline over 5 years	-24.24%	-36.31%	+12.07%
Max Drawdown (10Y) Largest decline over 10 years	-38.24%	-50.55%	+12.31%
Current Drawdown Current decline from peak	0.00%	-1.00%	+1.00%
Average Drawdown Average peak-to-trough decline	-25.11%	-12.16%	-12.95%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.27%	2.90%	+0.37%

Volatility

JANEX vs. FSMAX - Volatility Comparison

The current volatility for Janus Henderson Enterprise Fund (JANEX) is 4.10%, while Fidelity Extended Market Index Fund (FSMAX) has a volatility of 4.84%. This indicates that JANEX experiences smaller price fluctuations and is considered to be less risky than FSMAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	JANEX	FSMAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.10%	4.84%	-0.74%
Volatility (6M) Calculated over the trailing 6-month period	10.54%	12.48%	-1.94%
Volatility (1Y) Calculated over the trailing 1-year period	13.78%	17.20%	-3.42%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.67%	22.33%	-4.66%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.71%	30.23%	-11.52%

JANEX vs. FSMAX - Expense Ratio Comparison

JANEX has a 0.79% expense ratio, which is higher than FSMAX's 0.04% expense ratio.

Dividends

JANEX vs. FSMAX - Dividend Comparison

JANEX's dividend yield for the trailing twelve months is around 7.03%, more than FSMAX's 0.50% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
JANEX Janus Henderson Enterprise Fund	7.03%	7.51%	7.00%	7.52%	10.51%	15.98%	8.46%	4.45%	6.38%	1.78%	1.64%	3.64%

Frequently Asked Questions

Can I hold both JANEX and FSMAX in my portfolio?

With a correlation of 0.91, JANEX 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, JANEX or FSMAX?

FSMAX has higher volatility (4.84%) compared to JANEX (4.10%). In terms of maximum drawdown, JANEX dropped -79.85% vs FSMAX's -50.55%.

Which has better risk-adjusted returns?

FSMAX currently has the higher Sharpe Ratio (1.69 vs 1.03), 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.