NPHIX vs. RPHIX

Last updated Apr 1, 2026

Compare and contrast key facts about American Century High Income Fund (NPHIX) and RiverPark Short Term High Yield Fund (RPHIX).

NPHIX is managed by American Century. It was launched on Dec 27, 2012. RPHIX is managed by RiverPark Funds. It was launched on Sep 30, 2010.

Performance

NPHIX vs. RPHIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century High Income Fund (NPHIX) and RiverPark Short Term High Yield Fund (RPHIX). The values are adjusted to include any dividend payments, if applicable.

NPHIX vs. RPHIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
NPHIX American Century High Income Fund	-1.52%	8.86%	6.92%	12.05%	-12.59%	6.12%	8.03%	12.70%	-1.98%	7.02%
RPHIX RiverPark Short Term High Yield Fund	1.02%	4.76%	6.71%	5.87%	2.97%	2.05%	1.95%	2.77%	2.44%	2.50%

Returns By Period

In the year-to-date period, NPHIX achieves a -1.52% return, which is significantly lower than RPHIX's 1.02% return. Over the past 10 years, NPHIX has outperformed RPHIX with an annualized return of 5.67%, while RPHIX has yielded a comparatively lower 3.51% annualized return.

NPHIX

• 1D: 0.23%
• 1M: -2.28%
• YTD: -1.52%
• 6M: -0.09%
• 1Y: 6.16%
• 3Y*: 7.27%
• 5Y*: 3.26%
• 10Y*: 5.67%

RPHIX

• 1D: 0.10%
• 1M: 0.41%
• YTD: 1.02%
• 6M: 2.21%
• 1Y: 4.74%
• 3Y*: 5.70%
• 5Y*: 4.56%
• 10Y*: 3.51%

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

NPHIX vs. RPHIX - Expense Ratio Comparison

NPHIX has a 0.58% expense ratio, which is lower than RPHIX's 0.89% expense ratio.

RPHIX

RiverPark Short Term High Yield Fund

NPHIX

American Century High Income Fund

Return for Risk

NPHIX vs. RPHIX — Risk / Return Rank

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

NPHIX

NPHIX Risk / Return Rank: 87
NPHIX Sharpe Ratio Rank: 87
NPHIX Sortino Ratio Rank: 89
NPHIX Omega Ratio Rank: 89
NPHIX Calmar Ratio Rank: 83
NPHIX Martin Ratio Rank: 85

RPHIX

RPHIX Risk / Return Rank: 100
RPHIX Sharpe Ratio Rank: 100
RPHIX Sortino Ratio Rank: 100
RPHIX Omega Ratio Rank: 99
RPHIX Calmar Ratio Rank: 99
RPHIX Martin Ratio Rank: 100

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.

NPHIX vs. RPHIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century High Income Fund (NPHIX) and RiverPark Short Term High Yield Fund (RPHIX). 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.

	NPHIX	RPHIX	Difference
Sharpe ratio Return per unit of total volatility	1.74	5.05	-3.32
Sortino ratio Return per unit of downside risk	2.49	10.09	-7.59
Omega ratio Gain probability vs. loss probability	1.40	3.43	-2.03
Calmar ratio Return relative to maximum drawdown	2.03	11.50	-9.47
Martin ratio Return relative to average drawdown	8.74	85.12	-76.38
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

NPHIX vs. RPHIX - Sharpe Ratio Comparison

The current NPHIX Sharpe Ratio is 1.74, which is lower than the RPHIX Sharpe Ratio of 5.05. The chart below compares the historical Sharpe Ratios of NPHIX and RPHIX, offering insights into how both investments have performed under varying market conditions. These values are calculated using daily returns over the previous 12 months.

Sharpe Ratios by Period

	NPHIX	RPHIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.74	5.05	-3.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.63	3.63	-3.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	1.01	2.94	-1.93
Sharpe Ratio (All Time) Calculated using the full available price history	0.97	2.94	-1.97

Correlation

The correlation between NPHIX and RPHIX is 0.29, which is considered to be low. This implies their price changes are not closely related. A low correlation is generally favorable for portfolio diversification, as it helps to reduce overall risk by spreading it across multiple assets with different performance patterns.

Dividends

NPHIX vs. RPHIX - Dividend Comparison

NPHIX's dividend yield for the trailing twelve months is around 6.32%, more than RPHIX's 4.10% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
NPHIX American Century High Income Fund	6.32%	6.69%	6.07%	4.81%	4.95%	5.77%	5.35%	5.54%	6.24%	5.87%	5.72%	7.44%
RPHIX RiverPark Short Term High Yield Fund	4.10%	4.76%	6.40%	5.08%	3.46%	2.03%	2.44%	2.85%	2.83%	2.68%	2.63%	3.19%

Drawdowns

NPHIX vs. RPHIX - Drawdown Comparison

The maximum NPHIX drawdown since its inception was -21.67%, which is greater than RPHIX's maximum drawdown of -3.16%. Use the drawdown chart below to compare losses from any high point for NPHIX and RPHIX.

Drawdown Indicators

	NPHIX	RPHIX	Difference
Max Drawdown Largest peak-to-trough decline	-21.67%	-3.16%	-18.51%
Max Drawdown (1Y) Largest decline over 1 year	-3.14%	-0.41%	-2.73%
Max Drawdown (5Y) Largest decline over 5 years	-16.34%	-0.92%	-15.42%
Max Drawdown (10Y) Largest decline over 10 years	-21.67%	-3.16%	-18.51%
Current Drawdown Current decline from peak	-2.30%	0.00%	-2.30%
Average Drawdown Average peak-to-trough decline	-2.55%	-0.09%	-2.46%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.73%	0.06%	+0.67%

Volatility

NPHIX vs. RPHIX - Volatility Comparison

American Century High Income Fund (NPHIX) has a higher volatility of 1.18% compared to RiverPark Short Term High Yield Fund (RPHIX) at 0.24%. This indicates that NPHIX's price experiences larger fluctuations and is considered to be riskier than RPHIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	NPHIX	RPHIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.18%	0.24%	+0.94%
Volatility (6M) Calculated over the trailing 6-month period	2.26%	0.62%	+1.64%
Volatility (1Y) Calculated over the trailing 1-year period	3.84%	0.97%	+2.87%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	5.24%	1.26%	+3.98%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	5.64%	1.20%	+4.44%