JNBSX vs. AMCPX

Last updated Jun 4, 2026

JNBSX (JPMorgan Income Builder Fund) and AMCPX (American Funds AMCAP Fund Class A) are both mutual funds - JNBSX is a Diversified Portfolio fund managed by JPMorgan, while AMCPX is a Large Cap Growth Equities fund managed by American Funds. Over the past 10 years, JNBSX returned 6.25%/yr vs 12.36%/yr for AMCPX. Their correlation of 0.81 suggests significant overlap in exposure. JNBSX charges 0.60%/yr vs 0.65%/yr for AMCPX.

Performance

JNBSX vs. AMCPX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in JPMorgan Income Builder Fund (JNBSX) and American Funds AMCAP Fund Class A (AMCPX). 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 JNBSX having a 6.50% return and AMCPX slightly lower at 6.34%. Over the past 10 years, JNBSX has underperformed AMCPX with an annualized return of 6.25%, while AMCPX has yielded a comparatively higher 12.36% annualized return.

JNBSX

• 1D: 0.37%
• 1M: 2.63%
• YTD: 6.50%
• 6M: 6.90%
• 1Y: 16.06%
• 3Y*: 11.24%
• 5Y*: 4.67%
• 10Y*: 6.25%

AMCPX

• 1D: -0.77%
• 1M: 3.82%
• YTD: 6.34%
• 6M: 6.01%
• 1Y: 21.86%
• 3Y*: 19.82%
• 5Y*: 9.39%
• 10Y*: 12.36%

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

JNBSX vs. AMCPX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
JNBSX JPMorgan Income Builder Fund	6.50%	12.87%	7.36%	9.34%	-12.81%	9.19%	6.24%	14.95%	-4.22%	11.89%
AMCPX American Funds AMCAP Fund Class A	6.34%	17.68%	21.11%	31.04%	-28.67%	20.57%	21.42%	26.35%	-4.42%	22.08%

Correlation

The correlation between JNBSX and AMCPX is 0.82, 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	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (10Y) Calculated over the trailing 10-year period	0.78
Correlation (All Time) Calculated using the full available price history since Jun 1, 2007	0.81

The correlation between JNBSX and AMCPX has been stable across timeframes, ranging from 0.76 to 0.82 - a consistent structural relationship.

Return for Risk

JNBSX vs. AMCPX — Risk / Return Rank

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

JNBSX

JNBSX Risk / Return Rank: 71
JNBSX Sharpe Ratio Rank: 77
JNBSX Sortino Ratio Rank: 75
JNBSX Omega Ratio Rank: 78
JNBSX Calmar Ratio Rank: 55
JNBSX Martin Ratio Rank: 70

AMCPX

AMCPX Risk / Return Rank: 27
AMCPX Sharpe Ratio Rank: 30
AMCPX Sortino Ratio Rank: 28
AMCPX Omega Ratio Rank: 30
AMCPX Calmar Ratio Rank: 19
AMCPX Martin Ratio Rank: 27

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.

JNBSX vs. AMCPX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for JPMorgan Income Builder Fund (JNBSX) and American Funds AMCAP Fund Class A (AMCPX). 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.

	JNBSX	AMCPX	Difference
Sharpe ratio: Return per unit of total volatility	2.54	1.56	+0.97
Sortino ratio: Return per unit of downside risk	3.61	2.19	+1.43
Omega ratio: Gain probability vs. loss probability	1.51	1.28	+0.22
Calmar ratio: Return relative to maximum drawdown	2.82	1.60	+1.22
Martin ratio: Return relative to average drawdown	13.46	6.51	+6.95
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

JNBSX vs. AMCPX - Sharpe Ratio Comparison

The current JNBSX Sharpe Ratio is 2.54, which is higher than the AMCPX Sharpe Ratio of 1.56. The chart below compares the historical Sharpe Ratios of JNBSX and AMCPX, 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

	JNBSX	AMCPX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.54	1.56	+0.97
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.60	0.49	+0.11
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.80	0.66	+0.13
Sharpe Ratio (All Time) Calculated using the full available price history	0.61	0.59	+0.02

Drawdowns

JNBSX vs. AMCPX - Drawdown Comparison

The maximum JNBSX drawdown since its inception was -37.33%, smaller than the maximum AMCPX drawdown of -62.37%. Use the drawdown chart below to compare losses from any high point for JNBSX and AMCPX.

Drawdown Indicators

	JNBSX	AMCPX	Difference
Max Drawdown Largest peak-to-trough decline	-37.33%	-62.37%	+25.04%
Max Drawdown (1Y) Largest decline over 1 year	-5.72%	-14.18%	+8.46%
Max Drawdown (3Y) Largest decline over 3 years	-7.90%	-19.71%	+11.81%
Max Drawdown (5Y) Largest decline over 5 years	-19.22%	-36.90%	+17.68%
Max Drawdown (10Y) Largest decline over 10 years	-23.60%	-36.90%	+13.30%
Current Drawdown Current decline from peak	0.00%	-0.77%	+0.77%
Average Drawdown Average peak-to-trough decline	-4.82%	-9.58%	+4.76%
Ulcer Index Depth and duration of drawdowns from previous peaks	1.20%	3.49%	-2.29%

Volatility

JNBSX vs. AMCPX - Volatility Comparison

The current volatility for JPMorgan Income Builder Fund (JNBSX) is 2.05%, while American Funds AMCAP Fund Class A (AMCPX) has a volatility of 3.57%. This indicates that JNBSX experiences smaller price fluctuations and is considered to be less risky than AMCPX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	JNBSX	AMCPX	Difference
Volatility (1M) Calculated over the trailing 1-month period	2.05%	3.57%	-1.52%
Volatility (6M) Calculated over the trailing 6-month period	5.37%	11.42%	-6.05%
Volatility (1Y) Calculated over the trailing 1-year period	6.36%	14.56%	-8.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	7.81%	19.24%	-11.43%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	7.88%	18.72%	-10.84%

JNBSX vs. AMCPX - Expense Ratio Comparison

JNBSX has a 0.60% expense ratio, which is lower than AMCPX's 0.65% expense ratio.

Dividends

JNBSX vs. AMCPX - Dividend Comparison

JNBSX's dividend yield for the trailing twelve months is around 5.11%, less than AMCPX's 8.21% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AMCPX American Funds AMCAP Fund Class A	8.21%	8.73%	8.19%	3.26%	7.54%	3.43%	3.88%	4.90%	7.84%	5.37%	3.81%	8.86%
JNBSX JPMorgan Income Builder Fund	5.11%	5.16%	5.90%	5.07%	4.61%	8.53%	3.47%	4.17%	4.56%	3.89%	4.40%	4.20%

Frequently Asked Questions

Can I hold both JNBSX and AMCPX in my portfolio?

JNBSX and AMCPX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, JNBSX or AMCPX?

AMCPX has higher volatility (3.57%) compared to JNBSX (2.05%). In terms of maximum drawdown, JNBSX dropped -37.33% vs AMCPX's -62.37%.

Which has better risk-adjusted returns?

JNBSX currently has the higher Sharpe Ratio (2.54 vs 1.56), 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.