COSSX vs. COSZX

Last updated Jun 4, 2026

COSSX (Columbia Overseas Value Fund Institutional 2 Class) and COSZX (Columbia Overseas Value Fund) are both Foreign Large Cap Equities funds from Columbia. Over the past 10 years, COSSX returned 10.31%/yr vs 10.22%/yr for COSZX. With a 1.00 correlation, they move nearly in lockstep. COSSX charges 0.82%/yr vs 0.90%/yr for COSZX.

Performance

COSSX vs. COSZX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Overseas Value Fund Institutional 2 Class (COSSX) and Columbia Overseas Value Fund (COSZX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both investments are quite close, with COSSX having a 7.45% return and COSZX slightly higher at 7.46%. Both investments have delivered pretty close results over the past 10 years, with COSSX having a 10.31% annualized return and COSZX not far behind at 10.22%.

COSSX

• 1D: 0.53%
• 1M: 0.93%
• YTD: 7.45%
• 6M: 10.17%
• 1Y: 28.09%
• 3Y*: 21.88%
• 5Y*: 11.53%
• 10Y*: 10.31%

COSZX

• 1D: 0.53%
• 1M: 0.93%
• YTD: 7.46%
• 6M: 10.18%
• 1Y: 28.08%
• 3Y*: 21.79%
• 5Y*: 11.46%
• 10Y*: 10.22%

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

COSSX vs. COSZX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COSSX Columbia Overseas Value Fund Institutional 2 Class	7.45%	45.91%	4.82%	16.13%	-5.96%	10.94%	0.02%	22.51%	-16.69%	27.83%
COSZX Columbia Overseas Value Fund	7.46%	45.80%	4.70%	16.05%	-5.99%	10.78%	-0.07%	22.37%	-16.70%	27.82%

Correlation

The correlation between COSSX and COSZX is 1.00 - these two move nearly in lockstep. At this level, holding both provides almost no diversification benefit. If you already own one, adding the other does little to reduce portfolio risk.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	1.00
Correlation (3Y) Calculated over the trailing 3-year period	1.00
Correlation (5Y) Calculated over the trailing 5-year period	1.00
Correlation (10Y) Calculated over the trailing 10-year period	1.00
Correlation (All Time) Calculated using the full available price history since Jan 5, 2016	1.00

The correlation between COSSX and COSZX has been stable across timeframes, ranging from 1.00 to 1.00 - a consistent structural relationship.

Return for Risk

COSSX vs. COSZX — Risk / Return Rank

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

COSSX

COSSX Risk / Return Rank: 42
COSSX Sharpe Ratio Rank: 46
COSSX Sortino Ratio Rank: 42
COSSX Omega Ratio Rank: 45
COSSX Calmar Ratio Rank: 38
COSSX Martin Ratio Rank: 37

COSZX

COSZX Risk / Return Rank: 41
COSZX Sharpe Ratio Rank: 45
COSZX Sortino Ratio Rank: 43
COSZX Omega Ratio Rank: 45
COSZX Calmar Ratio Rank: 37
COSZX Martin Ratio Rank: 37

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.

COSSX vs. COSZX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Overseas Value Fund Institutional 2 Class (COSSX) and Columbia Overseas Value Fund (COSZX). 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.

	COSSX	COSZX	Difference
Sharpe ratio: Return per unit of total volatility	1.99	1.98	+0.01
Sortino ratio: Return per unit of downside risk	2.76	2.74	+0.02
Omega ratio: Gain probability vs. loss probability	1.36	1.36	0.00
Calmar ratio: Return relative to maximum drawdown	2.31	2.30	+0.01
Martin ratio: Return relative to average drawdown	8.14	8.12	+0.02
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

COSSX vs. COSZX - Sharpe Ratio Comparison

The current COSSX Sharpe Ratio is 1.99, which is comparable to the COSZX Sharpe Ratio of 1.98. The chart below compares the historical Sharpe Ratios of COSSX and COSZX, 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

	COSSX	COSZX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.99	1.98	+0.01
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.73	0.73	+0.01
Sharpe Ratio (10Y) Calculated over the trailing 10-year period	0.59	0.59	+0.01
Sharpe Ratio (All Time) Calculated using the full available price history	0.57	0.21	+0.36

Drawdowns

COSSX vs. COSZX - Drawdown Comparison

The maximum COSSX drawdown since its inception was -43.24%, smaller than the maximum COSZX drawdown of -63.37%. Use the drawdown chart below to compare losses from any high point for COSSX and COSZX.

Drawdown Indicators

	COSSX	COSZX	Difference
Max Drawdown Largest peak-to-trough decline	-43.24%	-63.37%	+20.13%
Max Drawdown (1Y) Largest decline over 1 year	-11.78%	-11.76%	-0.02%
Max Drawdown (3Y) Largest decline over 3 years	-13.34%	-13.34%	0.00%
Max Drawdown (5Y) Largest decline over 5 years	-25.76%	-25.77%	+0.01%
Max Drawdown (10Y) Largest decline over 10 years	-43.24%	-43.40%	+0.16%
Current Drawdown Current decline from peak	-4.54%	-4.51%	-0.03%
Average Drawdown Average peak-to-trough decline	-7.13%	-17.90%	+10.77%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.34%	3.33%	+0.01%

Volatility

COSSX vs. COSZX - Volatility Comparison

Columbia Overseas Value Fund Institutional 2 Class (COSSX) and Columbia Overseas Value Fund (COSZX) have volatilities of 3.63% and 3.56%, respectively, indicating that both stocks experience similar levels of price fluctuations. This suggests that the risk associated with both stocks, as measured by volatility, is nearly the same. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSSX	COSZX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.63%	3.56%	+0.07%
Volatility (6M) Calculated over the trailing 6-month period	10.92%	10.95%	-0.03%
Volatility (1Y) Calculated over the trailing 1-year period	13.72%	13.77%	-0.05%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.80%	15.84%	-0.04%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.42%	17.45%	-0.03%

COSSX vs. COSZX - Expense Ratio Comparison

COSSX has a 0.82% expense ratio, which is lower than COSZX's 0.90% expense ratio.

Dividends

COSSX vs. COSZX - Dividend Comparison

COSSX's dividend yield for the trailing twelve months is around 7.48%, more than COSZX's 7.36% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COSSX Columbia Overseas Value Fund Institutional 2 Class	7.48%	8.03%	5.51%	4.07%	1.96%	3.70%	1.78%	3.95%	3.72%	1.72%	2.18%	0.00%
COSZX Columbia Overseas Value Fund	7.36%	7.91%	5.38%	3.97%	1.88%	3.59%	1.69%	3.82%	3.59%	1.71%	1.99%	2.27%

Frequently Asked Questions

Can I hold both COSSX and COSZX in my portfolio?

With a correlation of 1.00, COSSX and COSZX move almost identically. Holding both adds very little diversification - you're essentially doubling your position in the same market segment. Choosing one is usually more capital-efficient.

Which is riskier, COSSX or COSZX?

COSSX has higher volatility (3.63%) compared to COSZX (3.56%). In terms of maximum drawdown, COSSX dropped -43.24% vs COSZX's -63.37%.

Which has better risk-adjusted returns?

COSSX currently has the higher Sharpe Ratio (1.99 vs 1.98), 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.