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ISIN
US2130221060
CUSIP
213022106
Inception Date
Jun 30, 2009
Min. Investment
$5,000
Distribution Policy
Distributing
Asset Class
Multi-Asset
Asset Class Size
Large-Cap
Asset Class Style
Growth

Share Price Chart


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Performance

COBYX Performance Chart

The Cook & Bynum Fund (COBYX) is up 8.6% since the beginning of the year. COBYX is currently trading at $19 per share. Investors who bought $1,000 worth of COBYX shares 5 years ago would now be looking at an investment worth $1,442.


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S&P 500 Index

Returns By Period

The Cook & Bynum Fund (COBYX) has returned 8.58% so far this year and 12.56% over the past 12 months. Over the last ten years, COBYX has returned 4.55% per year, falling short of the S&P 500 Index benchmark, which averaged 13.42% annually.


The Cook & Bynum Fund

1D
0.16%
1M
-2.05%
YTD
8.58%
6M
11.91%
1Y
12.56%
3Y*
7.21%
5Y*
7.60%
10Y*
4.55%

Benchmark (S&P 500 Index)

1D
-0.26%
1M
-0.17%
YTD
7.91%
6M
7.98%
1Y
22.99%
3Y*
19.77%
5Y*
11.75%
10Y*
13.42%
*Multi-year figures are annualized to reflect compound growth (CAGR)

COBYX Monthly Returns History

Based on dividend-adjusted daily data since Jan 2, 2013, COBYX's average daily return is +0.02%, while the average monthly return is +0.44%. At this rate, an investment would double in approximately 13.2 years.

Historically, 56% of months were positive and 44% were negative. The best month was Nov 2020 with a return of +12.7%, while the worst month was Mar 2020 at -15.2%. The longest winning streak lasted 7 consecutive months, and the longest losing streak was 5 months.

On a daily basis, COBYX closed higher 49% of trading days. The best single day was Apr 9, 2025 with a return of +5.0%, while the worst single day was Apr 7, 2025 at -7.0%.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
20263.35%5.61%-5.62%4.03%3.50%-2.10%8.58%
20253.32%8.45%2.17%0.89%1.58%-1.44%-3.39%2.67%0.94%-3.04%3.98%3.24%20.50%
20242.79%-2.18%1.33%-3.99%6.70%-2.38%2.68%-3.25%0.54%-4.65%-3.44%-4.27%-10.32%
20235.89%-1.46%1.48%2.98%-1.93%5.18%1.00%0.12%-4.56%-2.91%7.92%2.63%16.73%
20220.08%2.80%2.14%-5.98%2.76%-8.51%1.79%-1.60%-3.18%11.10%6.43%2.60%9.28%
2021-3.15%2.00%7.04%4.43%2.05%-1.08%-2.10%1.19%-4.98%0.92%-2.44%5.55%9.05%

Benchmark Metrics

The Cook & Bynum Fund has an annualized alpha of -1.12%, beta of 0.47, and R2 of 0.42 versus S&P 500 Index. Calculated based on daily prices since January 02, 2013.

  • This fund participated in 62.09% of S&P 500 Index downside but only 42.93% of its upside - more exposed to losses than it benefited from rallies.
  • Beta of 0.47 may look defensive, but with R2 of 0.42 this fund is largely uncorrelated with S&P 500 Index - low beta reflects independence, not downside protection. See the Volatility section for a true picture of this fund's risk.
  • R2 of 0.42 means the benchmark explains less than half of this fund's behavior - treat beta with caution or consider switching to a more representative benchmark.

Alpha
-1.12%
Beta
0.47
0.42
Upside Capture
42.93%
Downside Capture
62.09%

Expense Ratio

COBYX has a high expense ratio of 1.49%, indicating above-average management fees.


Return for Risk

Risk / Return Rank

COBYX ranks 23 for risk / return — below 23% of mutual funds on our site. The returns aren't fully compensating for the risk involved. This isn't necessarily a dealbreaker, but factor it into your decision — especially if you're risk-averse.


COBYX Risk / Return Rank: 2323
Overall Rank
COBYX Sharpe Ratio Rank: 2323
Sharpe Ratio Rank
COBYX Sortino Ratio Rank: 2424
Sortino Ratio Rank
COBYX Omega Ratio Rank: 2222
Omega Ratio Rank
COBYX Calmar Ratio Rank: 2424
Calmar Ratio Rank
COBYX Martin Ratio Rank: 2222
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.

Return / Risk — by metrics

The table below present risk-adjusted performance metrics for The Cook & Bynum Fund (COBYX) and compare them to S&P 500 Index.


COBYXBenchmarkDifference
Sharpe ratioReturn per unit of total volatility

-0.74

Sortino ratioReturn per unit of downside risk

-0.83

Omega ratioGain probability vs. loss probability

1.21

1.35

-0.14

Calmar ratioReturn relative to maximum drawdown

1.53

2.54

-1.01

Martin ratioReturn relative to average drawdown

4.81

11.58

-6.76

Dividends

Dividend History

The Cook & Bynum Fund provided a 1.09% dividend yield over the last twelve months, with an annual payout of $0.21 per share.


0.00%2.00%4.00%6.00%8.00%10.00%12.00%$0.00$0.50$1.00$1.502016201720182019202020212022202320242025
Dividends
Dividend Yield
PeriodTTM2025202420232022202120202019201820172016
Dividend$0.21$0.21$0.00$0.17$0.17$0.29$0.04$0.10$1.62$0.31$0.75

Dividend yield

1.09%1.18%0.00%1.01%1.16%2.18%0.32%0.69%12.60%1.88%5.09%

Monthly Dividends

The table displays the monthly dividend distributions for The Cook & Bynum Fund. The dividends shown in the table have been adjusted to account for any splits that may have occurred.


JanFebMarAprMayJunJulAugSepOctNovDecTotal
2026$0.00$0.00$0.00$0.00$0.00$0.00$0.00
2025$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.21$0.21
2024$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00
2023$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.17$0.17
2022$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.17$0.17
2021$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.00$0.29$0.29

Drawdowns

Drawdowns Chart

The Drawdowns chart displays portfolio losses from any high point along the way. Drawdowns are calculated considering price movements and all distributions paid, if any.


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Worst Drawdowns

The table below displays the maximum drawdowns of the The Cook & Bynum Fund. A maximum drawdown is a measure of risk, indicating the largest reduction in portfolio value due to a series of losing trades.

The maximum drawdown for the The Cook & Bynum Fund was 34.18%, occurring on Mar 23, 2020. Recovery took 707 trading sessions.

The current The Cook & Bynum Fund drawdown is 3.04%.


Related event

Drawdown

Fall

Recovery

Underwater

COVID crash2020
-34.18%Mar 2020
2y 1mo2y 9mo
4y 11moJan 2018 - Jan 2023
2025 correction2025
-16.29%Jan 2025
5mo 29d11mo 2d
1y 4moJul 2024 - Dec 2025
2023 correction2023
-11.73%Oct 2023
1mo 20d1mo 24d
3mo 14dAug 2023 - Dec 2023
2015 correction2015
-11.05%Aug 2015
8mo 27d7mo 10d
1y 4moDec 2014 - Apr 2016
2026 pullback2026
-8.95%Mar 2026
1mo1mo 17d
2mo 17dFeb 2026 - May 2026

Drawdown Indicators


COBYXBenchmarkDifference

Max Drawdown

Largest peak-to-trough decline

-34.18%

-56.78%

+22.60%

Max Drawdown (1Y)

Largest decline over 1 year

-8.95%

-9.10%

+0.15%

Max Drawdown (3Y)

Largest decline over 3 years

-16.29%

-18.90%

+2.61%

Max Drawdown (5Y)

Largest decline over 5 years

-17.10%

-25.43%

+8.33%

Max Drawdown (10Y)

Largest decline over 10 years

-34.18%

-33.92%

-0.26%

Current Drawdown

Current decline from peak

-3.04%

-2.93%

-0.11%

Average Drawdown

Average peak-to-trough decline

-6.79%

-10.72%

+3.93%

Ulcer Index

Depth and duration of drawdowns from previous peaks

3.01%

1.99%

+1.02%

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.


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Portfolio Analyzer

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