COSNX vs. FHLFX

Last updated Jun 4, 2026

COSNX (Columbia Overseas Core Fund) and FHLFX (Fidelity Series International Index Fund) are both Foreign Large Cap Equities funds. Over the past 5 years, COSNX returned 8.24%/yr vs 8.85%/yr for FHLFX. With a 0.95 correlation, they move nearly in lockstep. COSNX charges 0.97%/yr vs 0.01%/yr for FHLFX.

Performance

COSNX vs. FHLFX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Columbia Overseas Core Fund (COSNX) and Fidelity Series International Index Fund (FHLFX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, COSNX achieves a 8.48% return, which is significantly lower than FHLFX's 9.53% return.

COSNX

• 1D: 0.52%
• 1M: 2.49%
• YTD: 8.48%
• 6M: 11.18%
• 1Y: 26.54%
• 3Y*: 18.98%
• 5Y*: 8.24%
• 10Y*: —

FHLFX

• 1D: 0.42%
• 1M: 4.09%
• YTD: 9.53%
• 6M: 12.09%
• 1Y: 22.51%
• 3Y*: 17.18%
• 5Y*: 8.85%
• 10Y*: —

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

COSNX vs. FHLFX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019	2018
COSNX Columbia Overseas Core Fund	8.48%	38.31%	3.42%	15.51%	-14.92%	9.60%	8.65%	25.39%	-11.60%
FHLFX Fidelity Series International Index Fund	9.53%	31.96%	3.67%	18.16%	-14.17%	11.23%	8.09%	21.66%	-10.70%

Correlation

The correlation between COSNX and FHLFX is 0.94, indicating a strong positive relationship between their price movements. Combining them offers limited diversification - they tend to fall together during downturns.

	Correlation
Correlation (1Y) Calculated over the trailing 1-year period	0.94
Correlation (3Y) Calculated over the trailing 3-year period	0.94
Correlation (5Y) Calculated over the trailing 5-year period	0.95
Correlation (All Time) Calculated using the full available price history since Sep 5, 2018	0.95

The correlation between COSNX and FHLFX has been stable across timeframes, ranging from 0.94 to 0.95 - a consistent structural relationship.

Return for Risk

COSNX vs. FHLFX — Risk / Return Rank

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

COSNX

COSNX Risk / Return Rank: 36
COSNX Sharpe Ratio Rank: 37
COSNX Sortino Ratio Rank: 35
COSNX Omega Ratio Rank: 37
COSNX Calmar Ratio Rank: 34
COSNX Martin Ratio Rank: 36

FHLFX

FHLFX Risk / Return Rank: 27
FHLFX Sharpe Ratio Rank: 26
FHLFX Sortino Ratio Rank: 26
FHLFX Omega Ratio Rank: 26
FHLFX Calmar Ratio Rank: 26
FHLFX Martin Ratio Rank: 31

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.

COSNX vs. FHLFX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Columbia Overseas Core Fund (COSNX) and Fidelity Series International Index Fund (FHLFX). 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.

	COSNX	FHLFX	Difference
Sharpe ratio: Return per unit of total volatility	1.78	1.47	+0.32
Sortino ratio: Return per unit of downside risk	2.49	2.10	+0.39
Omega ratio: Gain probability vs. loss probability	1.33	1.27	+0.06
Calmar ratio: Return relative to maximum drawdown	2.17	1.91	+0.26
Martin ratio: Return relative to average drawdown	8.03	7.17	+0.86
Data is calculated on a 1-year rolling basis and updated daily. The trend shows the change in the indicator over the past month.

COSNX vs. FHLFX - Sharpe Ratio Comparison

The current COSNX Sharpe Ratio is 1.78, which is comparable to the FHLFX Sharpe Ratio of 1.47. The chart below compares the historical Sharpe Ratios of COSNX and FHLFX, 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

	COSNX	FHLFX	Difference
Sharpe Ratio (1Y) Calculated over the trailing 1-year period	1.78	1.47	+0.32
Sharpe Ratio (5Y) Calculated over the trailing 5-year period	0.52	0.56	-0.03
Sharpe Ratio (All Time) Calculated using the full available price history	0.46	0.53	-0.06

Drawdowns

COSNX vs. FHLFX - Drawdown Comparison

The maximum COSNX drawdown since its inception was -36.68%, which is greater than FHLFX's maximum drawdown of -33.58%. Use the drawdown chart below to compare losses from any high point for COSNX and FHLFX.

Drawdown Indicators

	COSNX	FHLFX	Difference
Max Drawdown Largest peak-to-trough decline	-36.68%	-33.58%	-3.10%
Max Drawdown (1Y) Largest decline over 1 year	-11.83%	-11.37%	-0.46%
Max Drawdown (3Y) Largest decline over 3 years	-13.43%	-13.62%	+0.19%
Max Drawdown (5Y) Largest decline over 5 years	-31.39%	-29.36%	-2.03%
Current Drawdown Current decline from peak	-2.16%	-0.42%	-1.74%
Average Drawdown Average peak-to-trough decline	-7.60%	-6.11%	-1.49%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.19%	3.03%	+0.16%

Volatility

COSNX vs. FHLFX - Volatility Comparison

The current volatility for Columbia Overseas Core Fund (COSNX) is 3.80%, while Fidelity Series International Index Fund (FHLFX) has a volatility of 4.64%. This indicates that COSNX experiences smaller price fluctuations and is considered to be less risky than FHLFX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	COSNX	FHLFX	Difference
Volatility (1M) Calculated over the trailing 1-month period	3.80%	4.64%	-0.84%
Volatility (6M) Calculated over the trailing 6-month period	11.73%	12.08%	-0.35%
Volatility (1Y) Calculated over the trailing 1-year period	14.42%	14.83%	-0.41%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	15.81%	15.98%	-0.17%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	17.37%	17.64%	-0.27%

COSNX vs. FHLFX - Expense Ratio Comparison

COSNX has a 0.97% expense ratio, which is higher than FHLFX's 0.01% expense ratio.

Dividends

COSNX vs. FHLFX - Dividend Comparison

COSNX's dividend yield for the trailing twelve months is around 8.80%, more than FHLFX's 3.16% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
COSNX Columbia Overseas Core Fund	8.80%	9.55%	4.25%	4.59%	1.46%	8.15%	2.25%	3.80%	1.16%
FHLFX Fidelity Series International Index Fund	3.16%	3.46%	2.98%	2.86%	2.60%	2.47%	1.92%	1.95%	0.62%

Frequently Asked Questions

Can I hold both COSNX and FHLFX in my portfolio?

With a correlation of 0.94, COSNX and FHLFX 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, COSNX or FHLFX?

FHLFX has higher volatility (4.64%) compared to COSNX (3.80%). In terms of maximum drawdown, COSNX dropped -36.68% vs FHLFX's -33.58%.

Which has better risk-adjusted returns?

COSNX currently has the higher Sharpe Ratio (1.78 vs 1.47), 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.