RPIDX vs. COSIX

Last updated Jun 4, 2026

RPIDX (T. Rowe Price Dynamic Credit Fund) and COSIX (Columbia Strategic Income Fund) are both Nontraditional Bonds funds. Over the past 5 years, RPIDX returned 4.36%/yr vs 1.87%/yr for COSIX. At a 0.05 correlation, their price movements are largely independent. RPIDX charges 0.63%/yr vs 0.92%/yr for COSIX.

Performance

RPIDX vs. COSIX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in T. Rowe Price Dynamic Credit Fund (RPIDX) and Columbia Strategic Income Fund (COSIX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, RPIDX achieves a 0.16% return, which is significantly lower than COSIX's 1.35% return.

RPIDX

• 1D: -0.12%
• 1M: -0.75%
• YTD: 0.16%
• 6M: 0.98%
• 1Y: 6.90%
• 3Y*: 7.66%
• 5Y*: 4.36%
• 10Y*: —

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%

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

RPIDX vs. COSIX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
RPIDX T. Rowe Price Dynamic Credit Fund	0.16%	9.74%	9.92%	4.72%	-0.76%	6.21%	2.71%	6.87%
COSIX Columbia Strategic Income Fund	1.35%	6.98%	4.50%	9.86%	-11.65%	1.34%	7.12%	8.67%

Correlation

The correlation between RPIDX and COSIX is -0.02, meaning there is essentially no relationship between their price movements. Each responds to its own set of market drivers, making them strong candidates for combining in a diversified portfolio.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	-0.02
Correlation (3Y) Calculated over the trailing 3-year period	-0.04
Correlation (5Y) Calculated over the trailing 5-year period	-0.01
Correlation (All Time) Calculated using the full available price history since Jan 15, 2019	0.05

Return for Risk

RPIDX vs. COSIX — Risk / Return Rank

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

RPIDX

RPIDX Risk / Return Rank: 76
RPIDX Sharpe Ratio Rank: 51
RPIDX Sortino Ratio Rank: 86
RPIDX Omega Ratio Rank: 76
RPIDX Calmar Ratio Rank: 93
RPIDX Martin Ratio Rank: 73

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

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.

RPIDX vs. COSIX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for T. Rowe Price Dynamic Credit Fund (RPIDX) and Columbia Strategic Income Fund (COSIX). 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.

	RPIDX	COSIX	Difference
Sharpe ratio: Return per unit of total volatility	2.11	1.83	+0.27
Sortino ratio: Return per unit of downside risk	4.05	2.74	+1.30
Omega ratio: Gain probability vs. loss probability	1.49	1.33	+0.16
Calmar ratio: Return relative to maximum drawdown	5.25	2.44	+2.81
Martin ratio: Return relative to average drawdown	13.88	9.39	+4.49
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

RPIDX vs. COSIX - Sharpe Ratio Comparison

The current RPIDX Sharpe Ratio is 2.11, which is comparable to the COSIX Sharpe Ratio of 1.83. The chart below compares the historical Sharpe Ratios of RPIDX and COSIX, 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

	RPIDX	COSIX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	2.11	1.83	+0.27
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	1.14	0.41	+0.73
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	—	0.86	—
Sharpe Ratio (All Time) Calculated using the full available price history	1.11	1.01	+0.10

Drawdowns

RPIDX vs. COSIX - Drawdown Comparison

The maximum RPIDX drawdown since its inception was -19.95%, smaller than the maximum COSIX drawdown of -27.69%. Use the drawdown chart below to compare losses from any high point for RPIDX and COSIX.

Drawdown Indicators

	RPIDX	COSIX	Difference
Max Drawdown Largest peak-to-trough decline	-19.95%	-27.69%	+7.74%
Max Drawdown (1Y) Largest decline over 1 year	-1.34%	-2.21%	+0.87%
Max Drawdown (3Y) Largest decline over 3 years	-3.17%	-4.17%	+1.00%
Max Drawdown (5Y) Largest decline over 5 years	-7.31%	-16.88%	+9.57%
Max Drawdown (10Y) Largest decline over 10 years	—	-16.88%	—
Current Drawdown Current decline from peak	-0.86%	-0.02%	-0.84%
Average Drawdown Average peak-to-trough decline	-1.87%	-2.47%	+0.60%
Ulcer Index Depth and duration of drawdowns from previous peaks	0.51%	0.57%	-0.06%

Volatility

RPIDX vs. COSIX - Volatility Comparison

The current volatility for T. Rowe Price Dynamic Credit Fund (RPIDX) is 0.64%, while Columbia Strategic Income Fund (COSIX) has a volatility of 1.04%. This indicates that RPIDX experiences smaller price fluctuations and is considered to be less risky than COSIX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	RPIDX	COSIX	Difference
Volatility (1M) Calculated over the trailing 1-month period	0.64%	1.04%	-0.40%
Volatility (6M) Calculated over the trailing 6-month period	2.58%	2.21%	+0.37%
Volatility (1Y) Calculated over the trailing 1-year period	3.35%	2.95%	+0.40%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	3.83%	4.55%	-0.72%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	4.80%	4.17%	+0.63%

RPIDX vs. COSIX - Expense Ratio Comparison

RPIDX has a 0.63% expense ratio, which is lower than COSIX's 0.92% expense ratio.

Dividends

RPIDX vs. COSIX - Dividend Comparison

RPIDX's dividend yield for the trailing twelve months is around 9.93%, more than COSIX's 4.99% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
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%
RPIDX T. Rowe Price Dynamic Credit Fund	9.93%	9.91%	9.20%	6.64%	7.97%	5.34%	7.14%	4.41%	0.00%	0.00%	0.00%	0.00%

Frequently Asked Questions

Can I hold both RPIDX and COSIX in my portfolio?

RPIDX and COSIX have a correlation of -0.02, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, RPIDX or COSIX?

COSIX has higher volatility (1.04%) compared to RPIDX (0.64%). In terms of maximum drawdown, RPIDX dropped -19.95% vs COSIX's -27.69%.

Which has better risk-adjusted returns?

RPIDX currently has the higher Sharpe Ratio (2.11 vs 1.83), 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.