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FNILX vs. BRK-B
Performance
Return for Risk
Drawdowns
Volatility
Dividends

FNILX vs. BRK-B

Last updated Jun 13, 2026

FNILX (Fidelity ZERO Large Cap Index Fund) is Large Cap Blend Equities fund managed by Fidelity, while BRK-B (Berkshire Hathaway Inc.) is a stock. Over the past 5 years, FNILX returned 13.10%/yr vs 11.27%/yr for BRK-B. A 0.59 correlation means they provide meaningful diversification when combined.

Performance

FNILX vs. BRK-B - Performance Comparison

The chart below illustrates the hypothetical performance of a $10,000 investment in Fidelity ZERO Large Cap Index Fund (FNILX) and Berkshire Hathaway Inc. (BRK-B). The values are adjusted to include any dividend payments, if applicable.

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Returns By Period

In the year-to-date period, FNILX achieves a 8.36% return, which is significantly higher than BRK-B's -2.67% return.

FNILX

1D
1.81%
1M
-1.16%
YTD
8.36%
6M
8.67%
1Y
24.79%
3Y*
21.29%
5Y*
13.10%
10Y*
—

BRK-B

1D
0.71%
1M
1.07%
YTD
-2.67%
6M
-2.06%
1Y
0.35%
3Y*
13.30%
5Y*
11.27%
10Y*
13.22%
*Multi-year figures are annualized to reflect compound growth (CAGR)

FNILX vs. BRK-B - Yearly Performance Comparison

2026 (YTD)20252024202320222021202020192018
FNILX
Fidelity ZERO Large Cap Index Fund		8.36%17.81%25.47%27.45%-19.37%26.67%21.13%31.79%-13.60%
BRK-B
Berkshire Hathaway Inc.		-2.67%10.89%27.09%15.46%3.31%28.95%2.37%10.93%-5.78%

Correlation

The correlation between FNILX and BRK-B is 0.11, which is low. Their price movements are largely independent, making them effective diversification partners.

Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.11

Correlation (3Y)
Calculated over the trailing 3-year period

0.32

Correlation (5Y)
Calculated over the trailing 5-year period

0.50

Correlation (All Time)
Calculated using the full available price history since Sep 28, 2018

0.59

Over the past year, the correlation between FNILX and BRK-B has dropped to 0.11 - well below their long-term average of 0.59, suggesting their price drivers have been diverging.

Compare stocks, funds, or ETFs

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Fidelity ZERO Large Cap Index Fund

Berkshire Hathaway Inc.

Often compared with FNILX:
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Often compared with BRK-B:
BRK-B vs. SPYBRK-B vs. VOOBRK-B vs. BRK-ABRK-B vs. QQQBRK-B vs. ^NDXBRK-B vs. VTIBRK-B vs. VGT

Return for Risk

FNILX vs. BRK-B — Risk / Return Rank

Compare risk-adjusted metric ranks to identify better-performing investments over the past 12 months.
FNILX
FNILX Risk / Return Rank: 7070
Overall Rank
FNILX Sharpe Ratio Rank: 7070
Sharpe Ratio Rank
FNILX Sortino Ratio Rank: 6565
Sortino Ratio Rank
FNILX Omega Ratio Rank: 6666
Omega Ratio Rank
FNILX Calmar Ratio Rank: 7171
Calmar Ratio Rank
FNILX Martin Ratio Rank: 8181
Martin Ratio Rank
BRK-B
BRK-B Risk / Return Rank: 3939
Overall Rank
BRK-B Sharpe Ratio Rank: 4242
Sharpe Ratio Rank
BRK-B Sortino Ratio Rank: 3434
Sortino Ratio Rank
BRK-B Omega Ratio Rank: 3333
Omega Ratio Rank
BRK-B Calmar Ratio Rank: 4242
Calmar Ratio Rank
BRK-B Martin Ratio Rank: 4242
Martin Ratio Rank
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.

FNILX vs. BRK-B - Risk-Adjusted Trends Comparison

This table presents a comparison of risk-adjusted performance metrics for Fidelity ZERO Large Cap Index Fund (FNILX) and Berkshire Hathaway Inc. (BRK-B). 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.

FNILXBRK-BDifference
Sharpe ratioReturn per unit of total volatility
1.92
-0.02

+1.94

Sortino ratioReturn per unit of downside risk
2.60
0.08

+2.52

Omega ratioGain probability vs. loss probability

1.35

1.01

+0.34

Calmar ratioReturn relative to maximum drawdown

2.66

-0.02

+2.68

Martin ratioReturn relative to average drawdown

11.84

-0.05

+11.89

FNILX vs. BRK-B - Sharpe Ratio Comparison

The current FNILX Sharpe Ratio is 1.92, which is higher than the BRK-B Sharpe Ratio of -0.02. The chart below compares the historical Sharpe Ratios of FNILX and BRK-B, calculated using daily returns over the previous 12 months. A higher Sharpe Ratio indicates better risk-adjusted performance relative to the risk-free rate.

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Drawdowns

FNILX vs. BRK-B - Drawdown Comparison

The maximum FNILX drawdown since its inception was -33.76%, smaller than the maximum BRK-B drawdown of -53.86%. Use the drawdown chart below to compare losses from any high point for FNILX and BRK-B.

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Drawdown Indicators

FNILXBRK-BDifference

Max Drawdown

Largest peak-to-trough decline

-33.76%

-53.86%

+20.10%

Max Drawdown (1Y)

Largest decline over 1 year

-9.01%

-9.42%

+0.41%

Max Drawdown (3Y)

Largest decline over 3 years

-19.08%

-14.95%

-4.13%

Max Drawdown (5Y)

Largest decline over 5 years

-25.40%

-26.58%

+1.18%

Max Drawdown (10Y)

Largest decline over 10 years

—

-29.57%

—

Current Drawdown

Current decline from peak

-2.87%

-9.36%

+6.49%

Average Drawdown

Average peak-to-trough decline

-5.36%

-11.07%

+5.71%

Ulcer Index

Depth and duration of drawdowns from previous peaks

2.02%

4.53%

-2.51%

Volatility

FNILX vs. BRK-B - Volatility Comparison

Fidelity ZERO Large Cap Index Fund (FNILX) has a higher volatility of 4.59% compared to Berkshire Hathaway Inc. (BRK-B) at 3.95%. This indicates that FNILX's price experiences larger fluctuations and is considered to be riskier than BRK-B based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

FNILXBRK-BDifference

Volatility (1M)

Calculated over the trailing 1-month period

4.59%

3.95%

+0.64%

Volatility (6M)

Calculated over the trailing 6-month period

9.76%

10.78%

-1.02%

Volatility (1Y)

Calculated over the trailing 1-year period

12.47%

14.38%

-1.91%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.32%

17.12%

+0.20%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

20.05%

19.44%

+0.61%

Dividends

FNILX vs. BRK-B - Dividend Comparison

FNILX's dividend yield for the trailing twelve months is around 0.93%, while BRK-B has not paid dividends to shareholders.

PositionTTM20252024202320222021202020192018
BRK-B
Berkshire Hathaway Inc.		0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%0.00%
FNILX
Fidelity ZERO Large Cap Index Fund		0.93%1.01%1.09%1.34%1.53%0.95%1.20%1.17%0.53%

Frequently Asked Questions

FNILX and BRK-B have a correlation of 0.11, meaning they provide meaningful diversification benefit when combined. Depending on your allocation goals, holding both could reduce overall portfolio risk.

FNILX has higher volatility (4.59%) compared to BRK-B (3.95%). In terms of maximum drawdown, FNILX dropped -33.76% vs BRK-B's -53.86%.

FNILX currently has the higher Sharpe Ratio (1.92 vs -0.02), 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.

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