COSYX vs. FSKAX

Last updated Aug 1, 2026

COSYX (Columbia Overseas Value Fund Institutional 3 Class) and FSKAX (Fidelity Total Market Index Fund) are both mutual funds - COSYX is a Foreign Large Cap Equities fund managed by Columbia, while FSKAX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 10 years, COSYX returned 10.91%/yr vs 14.44%/yr for FSKAX. Their 0.71 correlation means they have sometimes moved together and sometimes differently. COSYX charges 0.77%/yr vs 0.01%/yr for FSKAX.

Performance

COSYX vs. FSKAX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Overseas Value Fund Institutional 3 Class (COSYX) and Fidelity Total Market Index Fund (FSKAX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

The year-to-date returns for both stocks are quite close, with COSYX having a 10.30% return and FSKAX slightly lower at 9.87%. Over the past 10 years, COSYX has underperformed FSKAX with an annualized return of 10.91%, while FSKAX has yielded a comparatively higher 14.44% 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%

FSKAX

• 1D: 1.63%
• 1M: -0.80%
• 6M: 8.19%
• YTD: 9.87%
• 1Y: 20.99%
• 3Y*: 18.61%
• 5Y*: 11.63%
• 10Y*: 14.44%
• ALL TIME*: 14.45%

*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
FSKAX Fidelity Total Market Index Fund	$0.00	$0.00	$0.00

COSYX vs. FSKAX - 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%
FSKAX Fidelity Total Market Index Fund	9.87%	17.06%	23.89%	26.12%	-19.53%	25.66%	20.79%	30.92%	-5.32%	20.85%

Correlation

The correlation between COSYX and FSKAX is 0.67, which is moderate. They have sometimes moved together and sometimes differently, sharing some price drivers without tracking each other closely.

	Correlation
Correlation (1Y) Focuses on recent behavior, but can change the most.	0.67
Correlation (3Y) Balances recent behavior with more history.	0.62
Correlation (5Y) Shows whether the relationship held over a longer period.	0.68
Correlation (10Y) Provides a long-term view across more market conditions.	0.71
Correlation (All Time) Calculated using the full available price history since Jan 4, 2016	0.71

The correlation between COSYX and FSKAX has been stable across timeframes, ranging from 0.62 to 0.71 - a consistent structural relationship.

Return for Risk

COSYX vs. FSKAX — 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

FSKAX

FSKAX Risk / Return Rank: 63
FSKAX Sharpe Ratio Rank: 59
FSKAX Sortino Ratio Rank: 57
FSKAX Omega Ratio Rank: 56
FSKAX Calmar Ratio Rank: 66
FSKAX Martin Ratio Rank: 77

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. FSKAX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Overseas Value Fund Institutional 3 Class (COSYX) and Fidelity Total Market Index Fund (FSKAX). 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	FSKAX	Difference
Sharpe ratio: Return per unit of total volatility	1.92	1.41	+0.51
Sortino ratio: Return per unit of downside risk	2.72	1.98	+0.75
Omega ratio: Gain probability vs. loss probability	1.35	1.25	+0.10
Calmar ratio: Return relative to maximum drawdown	2.31	2.09	+0.22
Martin ratio: Return relative to average drawdown	6.73	8.96	-2.23

COSYX vs. FSKAX - Sharpe Ratio Comparison

The current COSYX Sharpe Ratio is 1.92, which is higher than the FSKAX Sharpe Ratio of 1.41. The chart below compares the historical Sharpe Ratios of COSYX and FSKAX, 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. FSKAX - Drawdown Comparison

The maximum COSYX drawdown since its inception was -43.16%, which is greater than FSKAX's maximum drawdown of -35.01%. Use the drawdown chart below to compare losses from any high point for COSYX and FSKAX.

Drawdown Indicators

	COSYX	FSKAX	Difference
Max Drawdown Largest peak-to-trough decline	-43.16%	-35.01%	-8.15%
Max Drawdown (1Y) Largest decline over 1 year	-11.76%	-8.92%	-2.84%
Max Drawdown (3Y) Largest decline over 3 years	-13.32%	-19.43%	+6.11%
Max Drawdown (5Y) Largest decline over 5 years	-25.80%	-25.39%	-0.41%
Max Drawdown (10Y) Largest decline over 10 years	-43.16%	-35.01%	-8.15%
Current Drawdown Current decline from peak	-1.98%	-1.97%	-0.01%
Average Drawdown Average peak-to-trough decline	-7.09%	-3.99%	-3.10%
Ulcer Index Depth and duration of drawdowns from previous peaks	4.03%	2.08%	+1.95%

Volatility

COSYX vs. FSKAX - Volatility Comparison

Columbia Overseas Value Fund Institutional 3 Class (COSYX) has a higher volatility of 4.31% compared to Fidelity Total Market Index Fund (FSKAX) at 3.43%. This indicates that COSYX's price experiences larger fluctuations and is considered to be riskier than FSKAX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSYX	FSKAX	Difference
Volatility (1M) Calculated over the trailing 1-month period	4.31%	3.43%	+0.88%
Volatility (6M) Calculated over the trailing 6-month period	11.80%	10.33%	+1.47%
Volatility (1Y) Calculated over the trailing 1-year period	14.21%	13.21%	+1.00%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.85%	17.52%	-1.67%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.02%	18.45%	-1.43%

COSYX vs. FSKAX - Expense Ratio Comparison

COSYX has a 0.77% expense ratio, which is higher than FSKAX's 0.02% expense ratio.

Dividends

COSYX vs. FSKAX - Dividend Comparison

COSYX's dividend yield for the trailing twelve months is around 12.43%, more than FSKAX's 0.95% 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%
FSKAX Fidelity Total Market Index Fund	0.95%	1.01%	1.19%	1.41%	1.62%	1.15%	1.45%	1.94%	2.54%	2.07%	2.43%	0.82%

Frequently Asked Questions

Can I hold both COSYX and FSKAX in my portfolio?

COSYX and FSKAX have a correlation of 0.67, 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 FSKAX?

COSYX has higher volatility (4.31%) compared to FSKAX (3.43%). In terms of maximum drawdown, COSYX dropped -43.16% vs FSKAX's -35.01%.

Which has better risk-adjusted returns?

COSYX currently has the higher Sharpe Ratio (1.92 vs 1.41), 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.