COSYX vs. STK

Last updated Aug 1, 2026

COSYX (Columbia Overseas Value Fund Institutional 3 Class) and STK (Columbia Seligman Premium Technology Growth Fund) are both mutual funds - COSYX is a Foreign Large Cap Equities fund managed by Columbia, while STK is a Technology Equities fund actively managed by Columbia. Over the past 10 years, COSYX returned 10.91%/yr vs 22.24%/yr for STK. Their 0.53 correlation means they have sometimes moved together and sometimes differently. COSYX charges 0.77%/yr vs 1.12%/yr for STK.

Performance

COSYX vs. STK - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Overseas Value Fund Institutional 3 Class (COSYX) and Columbia Seligman Premium Technology Growth Fund (STK). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COSYX achieves a 10.30% return, which is significantly lower than STK's 36.26% return. Over the past 10 years, COSYX has underperformed STK with an annualized return of 10.91%, while STK has yielded a comparatively higher 22.24% annualized return.

COSYX

• 1D: 2.34%
• 1M: 4.21%
• 6M: 3.35%
• YTD: 10.30%
• 1Y: 27.23%
• 3Y*: 20.60%
• 5Y*: 13.30%
• 10Y*: 10.91%
• ALL TIME*: 10.08%

STK

• 1D: 1.95%
• 1M: -4.81%
• 6M: 25.48%
• YTD: 36.26%
• 1Y: 72.54%
• 3Y*: 28.58%
• 5Y*: 18.94%
• 10Y*: 22.24%
• ALL TIME*: 16.69%

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

Liquidity Comparison

Position	Avg. Volume Value (2W)	Avg. Volume Value (1M)	Avg. Volume Value (3M)
COSYX Columbia Overseas Value Fund Institutional 3 Class	$0.00	$0.00	$0.00
STK Columbia Seligman Premium Technology Growth Fund	$3.19M	$2.84M	$3.58M

COSYX vs. STK - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018	2017
COSYX Columbia Overseas Value Fund Institutional 3 Class	10.30%	45.97%	4.87%	16.28%	-5.91%	10.98%	-0.05%	22.64%	-16.64%	27.80%
STK Columbia Seligman Premium Technology Growth Fund	36.26%	24.85%	17.74%	46.60%	-30.36%	48.63%	25.39%	52.73%	-14.91%	33.52%

Correlation

The correlation between COSYX and STK is 0.49, which is low. Their historical price movements had little consistent relationship.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.49
Correlation (3Y) Balances recent behavior with more history.	0.45
Correlation (5Y) Shows whether the relationship held over a longer period.	0.53
Correlation (10Y) Provides a long-term view across more market conditions.	0.53
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016	0.53

The correlation between COSYX and STK has been stable across timeframes, ranging from 0.45 to 0.53 - a consistent structural relationship.

Return for Risk

COSYX vs. STK — Risk / Return Rank

Compare historical risk-adjusted metric ranks over the past 12 months.

COSYX

COSYX Risk / Return Rank: 71
COSYX Sharpe Ratio Rank: 80
COSYX Sortino Ratio Rank: 79
COSYX Omega Ratio Rank: 78
COSYX Calmar Ratio Rank: 70
COSYX Martin Ratio Rank: 47

STK

STK Risk / Return Rank: 88
STK Sharpe Ratio Rank: 93
STK Sortino Ratio Rank: 83
STK Omega Ratio Rank: 83
STK Calmar Ratio Rank: 90
STK Martin Ratio Rank: 90

The rank (0–100) uses a weighted average of the Sharpe, Sortino, Omega, Calmar, and Martin percentile ranks for the trailing 12 months. Higher means stronger historical risk-adjusted performance within the peer group.

COSYX vs. STK - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Overseas Value Fund Institutional 3 Class (COSYX) and Columbia Seligman Premium Technology Growth Fund (STK). 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.

Values are calculated on a 1-year rolling basis and updated daily. Risk-adjusted metrics are more stable over longer periods — use the period switch above to explore them.

	COSYX	STK	Difference
Sharpe ratio: Return per unit of total volatility	1.92	2.41	-0.49
Sortino ratio: Return per unit of downside risk	2.72	2.92	-0.20
Omega ratio: Gain probability vs. loss probability	1.35	1.39	-0.04
Calmar ratio: Return relative to maximum drawdown	2.31	3.35	-1.04
Martin ratio: Return relative to average drawdown	6.73	12.27	-5.55

COSYX vs. STK - Sharpe Ratio Comparison

The current COSYX Sharpe Ratio is 1.92, which is comparable to the STK Sharpe Ratio of 2.41. The chart below compares the historical Sharpe Ratios of COSYX and STK, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

Drawdowns

COSYX vs. STK - Drawdown Comparison

The maximum COSYX drawdown since its inception was -43.16%, roughly equal to the maximum STK drawdown of -41.74%. Use the drawdown chart below to compare losses from any high point for COSYX and STK.

Drawdown Indicators

	COSYX	STK	Difference
Max Drawdown Largest peak-to-trough decline	-43.16%	-41.74%	-1.42%
Max Drawdown (1Y) Largest decline over 1 year	-11.76%	-20.93%	+9.17%
Max Drawdown (3Y) Largest decline over 3 years	-13.32%	-26.59%	+13.27%
Max Drawdown (5Y) Largest decline over 5 years	-25.80%	-36.27%	+10.47%
Max Drawdown (10Y) Largest decline over 10 years	-43.16%	-41.74%	-1.42%
Current Drawdown Current decline from peak	-1.98%	-14.89%	+12.91%
Average Drawdown Average peak-to-trough decline	-7.09%	-7.44%	+0.35%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.03%	5.69%	-1.66%

Volatility

COSYX vs. STK - Volatility Comparison

The current volatility for Columbia Overseas Value Fund Institutional 3 Class (COSYX) is 4.31%, while Columbia Seligman Premium Technology Growth Fund (STK) has a volatility of 11.01%. This indicates that COSYX experiences smaller price fluctuations and is considered to be less risky than STK based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSYX	STK	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.31%	11.01%	-6.70%
Volatility (6M) Calculated over the trailing 6-month period	11.80%	25.42%	-13.62%
Volatility (1Y) Calculated over the trailing 1-year period	14.21%	29.07%	-14.86%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.85%	26.22%	-10.37%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.02%	26.66%	-9.64%

COSYX vs. STK - Expense Ratio Comparison

COSYX has a 0.77% expense ratio, which is lower than STK's 1.12% expense ratio.

Dividends

COSYX vs. STK - Dividend Comparison

COSYX's dividend yield for the trailing twelve months is around 12.43%, more than STK's 5.53% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018	2017	2016	2015
COSYX Columbia Overseas Value Fund Institutional 3 Class	12.43%	8.05%	5.55%	4.11%	2.00%	3.75%	1.82%	3.97%	3.75%	1.71%	2.20%	0.00%
STK Columbia Seligman Premium Technology Growth Fund	5.53%	7.38%	16.02%	6.70%	12.62%	8.48%	6.79%	7.86%	14.88%	11.82%	9.87%	10.32%

Frequently Asked Questions

Can I hold both COSYX and STK in my portfolio?

COSYX and STK have a correlation of 0.49, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, COSYX or STK?

STK has higher volatility (11.01%) compared to COSYX (4.31%). In terms of maximum drawdown, COSYX dropped -43.16% vs STK's -41.74%.

Which has better risk-adjusted returns?

STK currently has the higher Sharpe Ratio (2.41 vs 1.92), 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.