COSIX vs. AGTHX

Last updated Jun 4, 2026

COSIX (Columbia Strategic Income Fund) and AGTHX (American Funds The Growth Fund of America Class A) are both mutual funds - COSIX is a Nontraditional Bonds fund managed by Columbia, while AGTHX is a Large Cap Growth Equities fund actively managed by Capital Group. Over the past 10 years, COSIX returned 3.57%/yr vs 15.97%/yr for AGTHX. At a 0.21 correlation, their price movements are largely independent. COSIX charges 0.92%/yr vs 0.59%/yr for AGTHX.

Performance

COSIX vs. AGTHX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Strategic Income Fund (COSIX) and American Funds The Growth Fund of America Class A (AGTHX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COSIX achieves a 1.35% return, which is significantly lower than AGTHX's 10.09% return. Over the past 10 years, COSIX has underperformed AGTHX with an annualized return of 3.57%, while AGTHX has yielded a comparatively higher 15.97% annualized return.

COSIX

• 1D: 0.09%
• 1M: 0.65%
• YTD: 1.35%
• 6M: 1.24%
• 1Y: 5.32%
• 3Y*: 6.53%
• 5Y*: 1.87%
• 10Y*: 3.57%

AGTHX

• 1D: -0.33%
• 1M: 6.81%
• YTD: 10.09%
• 6M: 9.70%
• 1Y: 26.21%
• 3Y*: 25.16%
• 5Y*: 12.51%
• 10Y*: 15.97%

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

COSIX vs. AGTHX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COSIX Columbia Strategic Income Fund	1.35%	6.98%	4.50%	9.86%	-11.65%	1.34%	7.12%	10.19%	-0.96%	5.48%
AGTHX American Funds The Growth Fund of America Class A	10.09%	19.73%	28.02%	37.22%	-30.75%	19.32%	37.83%	28.16%	-3.15%	26.14%

Correlation

The correlation between COSIX and AGTHX is 0.43, which is low. Their price movements are largely independent, making them effective diversification partners.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.43
Correlation (3Y) Calculated over the trailing 3-year period	0.32
Correlation (5Y) Calculated over the trailing 5-year period	0.31
Correlation (10Y) Calculated over the trailing 10-year period	0.27
Correlation (All Time) Calculated using the full available price history since Jan 3, 1990	0.21

Over the past year, COSIX and AGTHX have become more correlated (0.43) than their long-term average of 0.21, meaning their price movements have been converging.

Return for Risk

COSIX vs. AGTHX — Risk / Return Rank

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

COSIX

COSIX Risk / Return Rank: 41
COSIX Sharpe Ratio Rank: 40
COSIX Sortino Ratio Rank: 43
COSIX Omega Ratio Rank: 38
COSIX Calmar Ratio Rank: 41
COSIX Martin Ratio Rank: 45

AGTHX

AGTHX Risk / Return Rank: 34
AGTHX Sharpe Ratio Rank: 38
AGTHX Sortino Ratio Rank: 34
AGTHX Omega Ratio Rank: 37
AGTHX Calmar Ratio Rank: 27
AGTHX Martin Ratio Rank: 33

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.

COSIX vs. AGTHX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Strategic Income Fund (COSIX) and American Funds The Growth Fund of America Class A (AGTHX). 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.

	COSIX	AGTHX	Difference
Sharpe ratio: Return per unit of total volatility	1.83	1.77	+0.06
Sortino ratio: Return per unit of downside risk	2.74	2.43	+0.31
Omega ratio: Gain probability vs. loss probability	1.33	1.32	+0.01
Calmar ratio: Return relative to maximum drawdown	2.44	1.95	+0.49
Martin ratio: Return relative to average drawdown	9.39	7.61	+1.78
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

COSIX vs. AGTHX - Sharpe Ratio Comparison

The current COSIX Sharpe Ratio is 1.83, which is comparable to the AGTHX Sharpe Ratio of 1.77. The chart below compares the historical Sharpe Ratios of COSIX and AGTHX, 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

	COSIX	AGTHX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.83	1.77	+0.06
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.41	0.62	-0.21
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.86	0.81	+0.04
Sharpe Ratio (All Time) Calculated using the full available price history	1.01	0.71	+0.30

Drawdowns

COSIX vs. AGTHX - Drawdown Comparison

The maximum COSIX drawdown since its inception was -27.69%, smaller than the maximum AGTHX drawdown of -51.91%. Use the drawdown chart below to compare losses from any high point for COSIX and AGTHX.

Drawdown Indicators

	COSIX	AGTHX	Difference
Max Drawdown Largest peak-to-trough decline	-27.69%	-51.91%	+24.22%
Max Drawdown (1Y) Largest decline over 1 year	-2.21%	-13.76%	+11.55%
Max Drawdown (3Y) Largest decline over 3 years	-4.17%	-21.57%	+17.40%
Max Drawdown (5Y) Largest decline over 5 years	-16.88%	-36.38%	+19.50%
Max Drawdown (10Y) Largest decline over 10 years	-16.88%	-36.38%	+19.50%
Current Drawdown Current decline from peak	-0.02%	-0.33%	+0.31%
Average Drawdown Average peak-to-trough decline	-2.47%	-9.20%	+6.73%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.57%	3.52%	-2.95%

Volatility

COSIX vs. AGTHX - Volatility Comparison

The current volatility for Columbia Strategic Income Fund (COSIX) is 1.04%, while American Funds The Growth Fund of America Class A (AGTHX) has a volatility of 3.67%. This indicates that COSIX experiences smaller price fluctuations and is considered to be less risky than AGTHX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSIX	AGTHX	Difference
Volatility (1M) Calculated over the trailing 1-month period	1.04%	3.67%	-2.63%
Volatility (6M) Calculated over the trailing 6-month period	2.21%	11.65%	-9.44%
Volatility (1Y) Calculated over the trailing 1-year period	2.95%	15.15%	-12.20%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	4.55%	20.25%	-15.70%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.17%	19.69%	-15.52%

COSIX vs. AGTHX - Expense Ratio Comparison

COSIX has a 0.92% expense ratio, which is higher than AGTHX's 0.59% expense ratio.

Dividends

COSIX vs. AGTHX - Dividend Comparison

COSIX's dividend yield for the trailing twelve months is around 4.99%, less than AGTHX's 9.71% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
AGTHX American Funds The Growth Fund of America Class A	9.71%	10.69%	8.99%	7.40%	4.05%	8.18%	4.30%	7.15%	11.99%	7.03%	6.61%	8.87%
COSIX Columbia Strategic Income Fund	4.99%	4.94%	5.20%	5.03%	3.56%	3.86%	3.24%	3.71%	4.25%	3.51%	3.09%	4.20%

Frequently Asked Questions

Can I hold both COSIX and AGTHX in my portfolio?

COSIX and AGTHX have a correlation of 0.43, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COSIX or AGTHX?

AGTHX has higher volatility (3.67%) compared to COSIX (1.04%). In terms of maximum drawdown, COSIX dropped -27.69% vs AGTHX's -51.91%.

Which has better risk-adjusted returns?

COSIX currently has the higher Sharpe Ratio (1.83 vs 1.77), 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.