JAMRX vs. FSPGX

Last updated Jun 4, 2026

JAMRX (Janus Henderson Research Fund Class I) and FSPGX (Fidelity Large Cap Growth Index Fund) are both Large Cap Growth Equities funds. Over the past 5 years, JAMRX returned 15.88%/yr vs 16.03%/yr for FSPGX. With a 0.98 correlation, they move nearly in lockstep. JAMRX charges 0.64%/yr vs 0.04%/yr for FSPGX.

Performance

JAMRX vs. FSPGX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Janus Henderson Research Fund Class I (JAMRX) and Fidelity Large Cap Growth Index Fund (FSPGX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, JAMRX achieves a 9.20% return, which is significantly higher than FSPGX's 8.60% return.

JAMRX

• 1D: -0.23%
• 1M: 7.60%
• YTD: 9.20%
• 6M: 8.72%
• 1Y: 25.28%
• 3Y*: 28.26%
• 5Y*: 15.88%
• 10Y*: 17.24%

FSPGX

• 1D: -0.38%
• 1M: 7.10%
• YTD: 8.60%
• 6M: 7.98%
• 1Y: 27.43%
• 3Y*: 25.53%
• 5Y*: 16.03%
• 10Y*: —

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

JAMRX vs. FSPGX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
JAMRX Janus Henderson Research Fund Class I	9.20%	18.32%	41.65%	43.02%	-30.03%	20.08%	32.67%	35.28%	-2.84%	24.74%
FSPGX Fidelity Large Cap Growth Index Fund	8.60%	18.54%	33.27%	42.77%	-29.17%	27.57%	38.46%	36.38%	-1.79%	27.70%

Correlation

The correlation between JAMRX and FSPGX is 0.98 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.98
Correlation (3Y) Calculated over the trailing 3-year period	0.98
Correlation (5Y) Calculated over the trailing 5-year period	0.98
Correlation (All Time) Calculated using the full available price history since Jan 4, 2017	0.98

The correlation between JAMRX and FSPGX has been stable across timeframes, ranging from 0.98 to 0.98 - a consistent structural relationship.

Return for Risk

JAMRX vs. FSPGX — Risk / Return Rank

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

JAMRX

JAMRX Risk / Return Rank: 27
JAMRX Sharpe Ratio Rank: 33
JAMRX Sortino Ratio Rank: 30
JAMRX Omega Ratio Rank: 31
JAMRX Calmar Ratio Rank: 18
JAMRX Martin Ratio Rank: 20

FSPGX

FSPGX Risk / Return Rank: 32
FSPGX Sharpe Ratio Rank: 41
FSPGX Sortino Ratio Rank: 36
FSPGX Omega Ratio Rank: 37
FSPGX Calmar Ratio Rank: 22
FSPGX Martin Ratio Rank: 23

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.

JAMRX vs. FSPGX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Janus Henderson Research Fund Class I (JAMRX) and Fidelity Large Cap Growth Index Fund (FSPGX). 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.

	JAMRX	FSPGX	Difference
Sharpe ratio Return per unit of total volatility	1.66	1.85	-0.19
Sortino ratio Return per unit of downside risk	2.28	2.50	-0.22
Omega ratio Gain probability vs. loss probability	1.29	1.32	-0.03
Calmar ratio Return relative to maximum drawdown	1.54	1.76	-0.22
Martin ratio Return relative to average drawdown	5.31	5.90	-0.59
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

JAMRX vs. FSPGX - Sharpe Ratio Comparison

The current JAMRX Sharpe Ratio is 1.66, which is comparable to the FSPGX Sharpe Ratio of 1.85. The chart below compares the historical Sharpe Ratios of JAMRX and FSPGX, 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

	JAMRX	FSPGX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.66	1.85	-0.19
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.72	0.75	-0.03
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.81	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.60	0.90	-0.30

Drawdowns

JAMRX vs. FSPGX - Drawdown Comparison

The maximum JAMRX drawdown since its inception was -71.20%, which is greater than FSPGX's maximum drawdown of -32.66%. Use the drawdown chart below to compare losses from any high point for JAMRX and FSPGX.

Drawdown Indicators

	JAMRX	FSPGX	Difference
Max Drawdown Largest peak-to-trough decline	-71.20%	-32.66%	-38.54%
Max Drawdown (1Y) Largest decline over 1 year	-17.09%	-16.17%	-0.92%
Max Drawdown (3Y) Largest decline over 3 years	-22.66%	-23.32%	+0.66%
Max Drawdown (5Y) Largest decline over 5 years	-36.53%	-32.66%	-3.87%
Max Drawdown (10Y) Largest decline over 10 years	-36.53%	—	—
Current Drawdown Current decline from peak	-0.23%	-0.38%	+0.15%
Average Drawdown Average peak-to-trough decline	-21.65%	-6.37%	-15.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.95%	4.81%	+0.14%

Volatility

JAMRX vs. FSPGX - Volatility Comparison

Janus Henderson Research Fund Class I (JAMRX) has a higher volatility of 3.78% compared to Fidelity Large Cap Growth Index Fund (FSPGX) at 3.32%. This indicates that JAMRX's price experiences larger fluctuations and is considered to be riskier than FSPGX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	JAMRX	FSPGX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.78%	3.32%	+0.46%
Volatility (6M) Calculated over the trailing 6-month period	12.33%	11.58%	+0.75%
Volatility (1Y) Calculated over the trailing 1-year period	15.87%	15.39%	+0.48%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	22.13%	21.49%	+0.64%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.37%	21.55%	-0.18%

JAMRX vs. FSPGX - Expense Ratio Comparison

JAMRX has a 0.64% expense ratio, which is higher than FSPGX's 0.04% expense ratio.

Dividends

JAMRX vs. FSPGX - Dividend Comparison

JAMRX's dividend yield for the trailing twelve months is around 10.97%, more than FSPGX's 0.32% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
FSPGX Fidelity Large Cap Growth Index Fund	0.32%	0.34%	0.37%	0.73%	0.86%	2.22%	1.76%	1.04%	1.32%	0.22%	0.00%	0.00%
JAMRX Janus Henderson Research Fund Class I	10.97%	11.98%	10.22%	2.88%	0.28%	13.02%	2.91%	10.27%	10.92%	8.17%	5.60%	9.61%

Frequently Asked Questions

Can I hold both JAMRX and FSPGX in my portfolio?

With a correlation of 0.98, JAMRX and FSPGX 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, JAMRX or FSPGX?

JAMRX has higher volatility (3.78%) compared to FSPGX (3.32%). In terms of maximum drawdown, JAMRX dropped -71.20% vs FSPGX's -32.66%.

Which has better risk-adjusted returns?

FSPGX currently has the higher Sharpe Ratio (1.85 vs 1.66), 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.