FDKFX vs. FNILX

Last updated Jun 24, 2026

FDKFX (Fidelity International Discovery K6 Fund) and FNILX (Fidelity ZERO Large Cap Index Fund) are both mutual funds - FDKFX is a Foreign Large Cap Equities fund managed by Fidelity, while FNILX is a Large Cap Blend Equities fund managed by Fidelity. Over the past 5 years, FDKFX returned 7.85%/yr vs 13.32%/yr for FNILX. A 0.78 correlation means they provide meaningful diversification when combined. FDKFX charges 0.60%/yr vs 0.00%/yr for FNILX.

Performance

FDKFX vs. FNILX - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity International Discovery K6 Fund (FDKFX) and Fidelity ZERO Large Cap Index Fund (FNILX). The values are adjusted to include any dividend payments, if applicable.

Returns By Period

In the year-to-date period, FDKFX achieves a 14.97% return, which is significantly higher than FNILX's 9.63% return.

FDKFX

• 1D: 0.37%
• 1M: 4.02%
• YTD: 14.97%
• 6M: 15.25%
• 1Y: 28.22%
• 3Y*: 20.18%
• 5Y*: 7.85%
• 10Y*: —

FNILX

• 1D: -0.37%
• 1M: 0.34%
• YTD: 9.63%
• 6M: 8.65%
• 1Y: 25.14%
• 3Y*: 21.66%
• 5Y*: 13.32%
• 10Y*: —

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

FDKFX vs. FNILX - Yearly Performance Comparison

	2026 (YTD)	2025	2024	2023	2022	2021	2020	2019
FDKFX Fidelity International Discovery K6 Fund	14.97%	29.31%	11.14%	14.40%	-24.74%	11.20%	21.50%	11.81%
FNILX Fidelity ZERO Large Cap Index Fund	9.63%	17.81%	25.47%	27.45%	-19.37%	26.67%	21.13%	13.51%

Correlation

The correlation between FDKFX and FNILX is 0.82, 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	0.82
Correlation (3Y) Calculated over the trailing 3-year period	0.76
Correlation (5Y) Calculated over the trailing 5-year period	0.78
Correlation (All Time) Calculated using the full available price history since Jun 13, 2019	0.78

The correlation between FDKFX and FNILX has been stable across timeframes, ranging from 0.76 to 0.82 - a consistent structural relationship.

Return for Risk

FDKFX vs. FNILX — Risk / Return Rank

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

FDKFX

FDKFX Risk / Return Rank: 37
FDKFX Sharpe Ratio Rank: 36
FDKFX Sortino Ratio Rank: 34
FDKFX Omega Ratio Rank: 34
FDKFX Calmar Ratio Rank: 38
FDKFX Martin Ratio Rank: 42

FNILX

FNILX Risk / Return Rank: 62
FNILX Sharpe Ratio Rank: 60
FNILX Sortino Ratio Rank: 54
FNILX Omega Ratio Rank: 56
FNILX Calmar Ratio Rank: 64
FNILX Martin Ratio Rank: 73

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.

FDKFX vs. FNILX - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity International Discovery K6 Fund (FDKFX) and Fidelity ZERO Large Cap Index Fund (FNILX). 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.

	FDKFX	FNILX	Difference
Sharpe ratio: Return per unit of total volatility	1.62	2.10	-0.49
Sortino ratio: Return per unit of downside risk	2.28	2.84	-0.56
Omega ratio: Gain probability vs. loss probability	1.29	1.38	-0.09
Calmar ratio: Return relative to maximum drawdown	2.23	2.94	-0.71
Martin ratio: Return relative to average drawdown	8.51	12.99	-4.48

FDKFX vs. FNILX - Sharpe Ratio Comparison

The current FDKFX Sharpe Ratio is 1.62, which is comparable to the FNILX Sharpe Ratio of 2.10. The chart below compares the historical Sharpe Ratios of FDKFX and FNILX, 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

FDKFX vs. FNILX - Drawdown Comparison

The maximum FDKFX drawdown since its inception was -36.63%, which is greater than FNILX's maximum drawdown of -33.76%. Use the drawdown chart below to compare losses from any high point for FDKFX and FNILX.

Drawdown Indicators

	FDKFX	FNILX	Difference
Max Drawdown Largest peak-to-trough decline	-36.63%	-33.76%	-2.87%
Max Drawdown (1Y) Largest decline over 1 year	-13.12%	-9.01%	-4.11%
Max Drawdown (3Y) Largest decline over 3 years	-14.64%	-19.08%	+4.44%
Max Drawdown (5Y) Largest decline over 5 years	-36.63%	-25.40%	-11.23%
Current Drawdown Current decline from peak	0.00%	-1.73%	+1.73%
Average Drawdown Average peak-to-trough decline	-9.47%	-5.35%	-4.12%
Ulcer Index Depth and duration of drawdowns from previous peaks	3.42%	2.03%	+1.39%

Volatility

FDKFX vs. FNILX - Volatility Comparison

Fidelity International Discovery K6 Fund (FDKFX) has a higher volatility of 6.38% compared to Fidelity ZERO Large Cap Index Fund (FNILX) at 4.82%. This indicates that FDKFX's price experiences larger fluctuations and is considered to be riskier than FNILX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

Volatility by Period

	FDKFX	FNILX	Difference
Volatility (1M) Calculated over the trailing 1-month period	6.38%	4.82%	+1.56%
Volatility (6M) Calculated over the trailing 6-month period	15.40%	9.90%	+5.50%
Volatility (1Y) Calculated over the trailing 1-year period	18.10%	12.61%	+5.49%
Volatility (5Y) Calculated over the trailing 5-year period, annualized	17.33%	17.34%	-0.01%
Volatility (10Y) Calculated over the trailing 10-year period, annualized	18.90%	20.04%	-1.14%

FDKFX vs. FNILX - Expense Ratio Comparison

FDKFX has a 0.60% expense ratio, which is higher than FNILX's 0.00% expense ratio.

Dividends

FDKFX vs. FNILX - Dividend Comparison

FDKFX's dividend yield for the trailing twelve months is around 2.67%, more than FNILX's 0.92% yield.

Position	TTM	2025	2024	2023	2022	2021	2020	2019	2018
FDKFX Fidelity International Discovery K6 Fund	2.67%	3.07%	4.06%	1.62%	0.99%	1.90%	0.60%	0.80%	0.00%
FNILX Fidelity ZERO Large Cap Index Fund	0.92%	1.01%	1.09%	1.34%	1.53%	0.95%	1.20%	1.17%	0.53%

Frequently Asked Questions

Can I hold both FDKFX and FNILX in my portfolio?

FDKFX and FNILX have a correlation of 0.82, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

Which is riskier, FDKFX or FNILX?

FDKFX has higher volatility (6.38%) compared to FNILX (4.82%). In terms of maximum drawdown, FDKFX dropped -36.63% vs FNILX's -33.76%.

Which has better risk-adjusted returns?

FNILX currently has the higher Sharpe Ratio (2.10 vs 1.62), 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.