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

BRK-B vs. FNILX

Last updated Jun 13, 2026

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

Performance

BRK-B vs. FNILX - Performance Comparison

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

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Returns By Period

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

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%

FNILX

1D
1.81%
1M
-1.16%
YTD
8.36%
6M
8.67%
1Y
24.79%
3Y*
21.29%
5Y*
13.10%
10Y*
—
*Multi-year figures are annualized to reflect compound growth (CAGR)

BRK-B vs. FNILX - Yearly Performance Comparison

2026 (YTD)20252024202320222021202020192018
BRK-B
Berkshire Hathaway Inc.		-2.67%10.89%27.09%15.46%3.31%28.95%2.37%10.93%-5.78%
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%

Correlation

The correlation between BRK-B and FNILX 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 BRK-B and FNILX 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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Berkshire Hathaway Inc.

Fidelity ZERO Large Cap Index Fund

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
Often compared with FNILX:
FNILX vs. FXAIXFNILX vs. FZROXFNILX vs. VOOFNILX vs. SPYFNILX vs. FSPGXFNILX vs. SWPPXFNILX vs. BKLC

Return for Risk

BRK-B vs. FNILX — Risk / Return Rank

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

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

This table presents a comparison of risk-adjusted performance metrics for Berkshire Hathaway Inc. (BRK-B) 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.

BRK-BFNILXDifference
Sharpe ratioReturn per unit of total volatility
-0.02
1.92

-1.94

Sortino ratioReturn per unit of downside risk
0.08
2.60

-2.52

Omega ratioGain probability vs. loss probability

1.01

1.35

-0.34

Calmar ratioReturn relative to maximum drawdown

-0.02

2.66

-2.68

Martin ratioReturn relative to average drawdown

-0.05

11.84

-11.89

BRK-B vs. FNILX - Sharpe Ratio Comparison

The current BRK-B Sharpe Ratio is -0.02, which is lower than the FNILX Sharpe Ratio of 1.92. The chart below compares the historical Sharpe Ratios of BRK-B 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.

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Drawdowns

BRK-B vs. FNILX - Drawdown Comparison

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

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Drawdown Indicators

BRK-BFNILXDifference

Max Drawdown

Largest peak-to-trough decline

-53.86%

-33.76%

-20.10%

Max Drawdown (1Y)

Largest decline over 1 year

-9.42%

-9.01%

-0.41%

Max Drawdown (3Y)

Largest decline over 3 years

-14.95%

-19.08%

+4.13%

Max Drawdown (5Y)

Largest decline over 5 years

-26.58%

-25.40%

-1.18%

Max Drawdown (10Y)

Largest decline over 10 years

-29.57%

—

—

Current Drawdown

Current decline from peak

-9.36%

-2.87%

-6.49%

Average Drawdown

Average peak-to-trough decline

-11.07%

-5.36%

-5.71%

Ulcer Index

Depth and duration of drawdowns from previous peaks

4.53%

2.02%

+2.51%

Volatility

BRK-B vs. FNILX - Volatility Comparison

The current volatility for Berkshire Hathaway Inc. (BRK-B) is 3.95%, while Fidelity ZERO Large Cap Index Fund (FNILX) has a volatility of 4.59%. This indicates that BRK-B experiences smaller price fluctuations and is considered to be less risky than FNILX based on this measure. The chart below showcases a comparison of their rolling one-month volatility.

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Volatility by Period

BRK-BFNILXDifference

Volatility (1M)

Calculated over the trailing 1-month period

3.95%

4.59%

-0.64%

Volatility (6M)

Calculated over the trailing 6-month period

10.78%

9.76%

+1.02%

Volatility (1Y)

Calculated over the trailing 1-year period

14.38%

12.47%

+1.91%

Volatility (5Y)

Calculated over the trailing 5-year period, annualized

17.12%

17.32%

-0.20%

Volatility (10Y)

Calculated over the trailing 10-year period, annualized

19.44%

20.05%

-0.61%

Dividends

BRK-B vs. FNILX - Dividend Comparison

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

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

BRK-B and FNILX 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, BRK-B dropped -53.86% vs FNILX's -33.76%.

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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