TWCGX vs. ONERX

Last updated Apr 2, 2026

Compare and contrast key facts about American Century Growth Fund (TWCGX) and One Rock Fund (ONERX).

TWCGX is managed by American Century. It was launched on Jun 30, 1971. ONERX is managed by Wrona Investment Management. It was launched on Mar 6, 2020.

Performance

TWCGX vs. ONERX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in American Century Growth Fund (TWCGX) and One Rock Fund (ONERX). The values are adjusted to include any dividend payments, if applicable.

TWCGX vs. ONERX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020
TWCGX American Century Growth Fund	-10.23%	15.28%	26.20%	43.31%	-31.39%	27.86%	52.47%
ONERX One Rock Fund	-1.48%	49.37%	21.76%	72.41%	-42.06%	45.70%	104.46%

Returns By Period

In the year-to-date period, TWCGX achieves a -10.23% return, which is significantly lower than ONERX's -1.48% return.

TWCGX

• 1D: 3.75%
• 1M: -5.65%
• YTD: -10.23%
• 6M: -9.87%
• 1Y: 15.47%
• 3Y*: 17.60%
• 5Y*: 9.71%
• 10Y*: 14.92%

ONERX

• 1D: 7.72%
• 1M: -7.71%
• YTD: -1.48%
• 6M: -2.85%
• 1Y: 79.18%
• 3Y*: 35.95%
• 5Y*: 20.20%
• 10Y*: —

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

TWCGX vs. ONERX - Expense Ratio Comparison

TWCGX has a 0.94% expense ratio, which is lower than ONERX's 1.75% expense ratio.

ONERX

One Rock Fund

TWCGX

American Century Growth Fund

Return for Risk

TWCGX vs. ONERX — Risk / Return Rank

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

TWCGX

TWCGX Risk / Return Rank: 32
TWCGX Sharpe Ratio Rank: 29
TWCGX Sortino Ratio Rank: 34
TWCGX Omega Ratio Rank: 32
TWCGX Calmar Ratio Rank: 35
TWCGX Martin Ratio Rank: 30

ONERX

ONERX Risk / Return Rank: 91
ONERX Sharpe Ratio Rank: 91
ONERX Sortino Ratio Rank: 87
ONERX Omega Ratio Rank: 83
ONERX Calmar Ratio Rank: 98
ONERX Martin Ratio Rank: 96

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.

TWCGX vs. ONERX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for American Century Growth Fund (TWCGX) and One Rock Fund (ONERX). 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.

	TWCGX	ONERX	Difference
Sharpe ratio Return per unit of total volatility	0.73	1.96	-1.23
Sortino ratio Return per unit of downside risk	1.21	2.42	-1.20
Omega ratio Gain probability vs. loss probability	1.17	1.34	-0.17
Calmar ratio Return relative to maximum drawdown	0.99	4.49	-3.50
Martin ratio Return relative to average drawdown	3.39	15.11	-11.72
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

TWCGX vs. ONERX - Sharpe Ratio Comparison

The current TWCGX Sharpe Ratio is 0.73, which is lower than the ONERX Sharpe Ratio of 1.96. The chart below compares the historical Sharpe Ratios of TWCGX and ONERX, 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

	TWCGX	ONERX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	0.73	1.96	-1.23
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.45	0.02	+0.43
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.70	—	—
Sharpe Ratio (All Time) Calculated using the full available price history	0.51	0.04	+0.47

Correlation

The correlation between TWCGX and ONERX is 0.83, which is considered to be high. That indicates a strong positive relationship between their price movements. Having highly-correlated positions in a portfolio may signal a lack of diversification, potentially leading to increased risk during market downturns.

Dividends

TWCGX vs. ONERX - Dividend Comparison

TWCGX's dividend yield for the trailing twelve months is around 19.09%, less than ONERX's 24.48% yield.

	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
TWCGX American Century Growth Fund	19.09%	17.14%	5.96%	4.81%	4.86%	9.83%	5.33%	5.60%	14.07%	10.28%	4.64%	6.80%
ONERX One Rock Fund	24.48%	24.12%	0.00%	0.00%	10.57%	28.88%	18.66%	0.00%	0.00%	0.00%	0.00%	0.00%

Drawdowns

TWCGX vs. ONERX - Drawdown Comparison

The maximum TWCGX drawdown since its inception was -59.60%, smaller than the maximum ONERX drawdown of -96.43%. Use the drawdown chart below to compare losses from any high point for TWCGX and ONERX.

Drawdown Indicators

	TWCGX	ONERX	Difference
Max Drawdown Largest peak-to-trough decline	-59.60%	-96.43%	+36.83%
Max Drawdown (1Y) Largest decline over 1 year	-16.69%	-17.63%	+0.94%
Max Drawdown (5Y) Largest decline over 5 years	-34.92%	-96.43%	+61.51%
Max Drawdown (10Y) Largest decline over 10 years	-34.92%	—	—
Current Drawdown Current decline from peak	-13.56%	-92.58%	+79.02%
Average Drawdown Average peak-to-trough decline	-15.34%	-30.62%	+15.28%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.86%	5.24%	-0.38%

Volatility

TWCGX vs. ONERX - Volatility Comparison

The current volatility for American Century Growth Fund (TWCGX) is 6.79%, while One Rock Fund (ONERX) has a volatility of 18.51%. This indicates that TWCGX experiences smaller price fluctuations and is considered to be less risky than ONERX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	TWCGX	ONERX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.79%	18.51%	-11.72%
Volatility (6M) Calculated over the trailing 6-month period	12.60%	31.07%	-18.47%
Volatility (1Y) Calculated over the trailing 1-year period	22.69%	41.95%	-19.26%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	21.63%	821.63%	-800.00%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	21.27%	747.39%	-726.12%