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90/10 VOO/O Portfolio
Performance
Return for Risk
Dividends
Drawdowns
Volatility
Diversification

90/10 VOO/O Portfolio

Currency in USD · Last updated Jun 13, 2026

This portfolio follows the guidelines that Warren Buffett has written in his will for his wife's trust in the 2013 letter to Berkshire Hathaway shareholders. They state that the trustee should invest 90% in a low-cost S&P 500 index fund, with the remaining 10% invested in a short-term government bonds fund. The basic strategy is to own a major slice of all American businesses that are bound to grow in total. Buffett believes this portfolio is "superior to those attained by most investors - whether pension funds, institutions or individuals."

Asset Allocation

VOO 90.00%O 10.00%EquityEquity
PositionCategory/SectorTarget Weight
VOO
Vanguard S&P 500 ETF		S&P 500
90%
O
Realty Income Corporation		Real Estate
10%

S&P 500 Index

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Performance

Performance Chart

The chart shows the growth of an initial investment of $10,000 in 90/10 VOO/O Portfolio, comparing it to the performance of the S&P 500 index or another benchmark. All prices have been adjusted for splits and dividends. The portfolio is never rebalanced.

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Returns By Period

As of Jun 13, 2026, the 90/10 VOO/O Portfolio returned 9.30% Year-To-Date and 14.62% of annualized return in the last 10 years.

Position1D1MYTD6M1Y3Y*5Y*10Y*
Benchmark
S&P 500 Index
0.50%0.31%8.56%8.85%24.33%19.37%11.84%13.61%
Portfolio
90/10 VOO/O Portfolio
0.59%0.50%9.30%9.54%25.18%20.05%12.79%14.62%
Portfolio components:
O
Realty Income Corporation		1.31%3.07%13.70%11.57%14.88%6.59%3.49%4.89%
VOO
Vanguard S&P 500 ETF		0.55%0.37%9.08%9.44%25.76%20.95%13.43%15.50%
*Multi-year figures are annualized to reflect compound growth (CAGR)

Monthly Returns

Based on dividend-adjusted daily data since Sep 9, 2010, 90/10 VOO/O Portfolio's average daily return is +0.06%, while the average monthly return is +1.20%. At this rate, an investment would double in approximately 4.8 years.

Historically, 67% of months were positive and 33% were negative. The best month was Apr 2020 with a return of +12.6%, while the worst month was Mar 2020 at -14.4%. The longest winning streak lasted 10 consecutive months, and the longest losing streak was 5 months.

On a daily basis, 90/10 VOO/O Portfolio closed higher 55% of trading days. The best single day was Mar 24, 2020 with a return of +10.2%, while the worst single day was Mar 16, 2020 at -13.2%.

JanFebMarAprMayJunJulAugSepOctNovDecTotal
20261.81%-0.27%-5.19%10.27%4.80%-1.74%9.30%
20252.70%-0.96%-5.20%-0.75%5.83%5.02%2.06%2.23%3.57%2.08%0.20%-0.01%17.55%
20241.21%4.68%3.34%-3.82%4.69%3.38%1.58%2.74%2.20%-1.24%5.44%-2.59%23.29%
20236.37%-2.73%3.37%1.44%0.07%6.12%3.23%-2.03%-5.10%-2.32%9.48%4.72%23.83%
2022-5.06%-3.09%3.89%-8.10%0.13%-7.57%9.16%-4.41%-9.63%8.06%5.21%-5.22%-17.40%
2021-1.29%2.74%4.66%5.58%0.56%1.94%2.68%2.96%-5.05%7.25%-0.77%4.65%28.43%

Benchmark Metrics

90/10 VOO/O Portfolio has an annualized alpha of 1.72%, beta of 0.97, and R2 of 0.99 versus S&P 500 Index. Calculated based on daily prices since September 09, 2010.

  • This portfolio captured 101.67% of S&P 500 Index gains but only 94.00% of its losses - a favorable profile for investors.
  • With beta of 0.97 and R2 of 0.99, this portfolio moves broadly in line with S&P 500 Index - much of its variation is explained by market exposure rather than independent behavior.
Alpha
1.72%
Beta
0.97
R²
0.99
Upside Capture
101.67%
Downside Capture
94.00%
See how alpha, beta & R² have trended over time →

Expense Ratio

90/10 VOO/O Portfolio has an expense ratio of 0.03%, which is considered low. Below, you can find the expense ratios of the portfolio's funds side by side and easily compare their relative costs.

VOO
Vanguard S&P 500 ETF

Return for Risk

Risk / Return Rank

90/10 VOO/O Portfolio ranks 57 for risk / return — on par with similar Portfolios. You're getting a typical balance of risk and reward. Not a standout, but not a red flag either — a reasonable choice if other factors align with your goals.

90/10 VOO/O Portfolio Risk / Return Rank: 5757
Overall Rank
90/10 VOO/O Portfolio Sharpe Ratio Rank: 5757
Sharpe Ratio Rank
90/10 VOO/O Portfolio Sortino Ratio Rank: 5454
Sortino Ratio Rank
90/10 VOO/O Portfolio Omega Ratio Rank: 5858
Omega Ratio Rank
90/10 VOO/O Portfolio Calmar Ratio Rank: 5252
Calmar Ratio Rank
90/10 VOO/O Portfolio Martin Ratio Rank: 6565
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 presents risk-adjusted performance metrics for 90/10 VOO/O Portfolio and compares them with S&P 500 Index.

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.

PortfolioBenchmarkDifference
Sharpe ratioReturn per unit of total volatility

2.04

1.86

+0.18

Sortino ratioReturn per unit of downside risk

2.77

2.53

+0.24

Omega ratioGain probability vs. loss probability

1.37

1.34

+0.03

Calmar ratioReturn relative to maximum drawdown

2.81

2.53

+0.28

Martin ratioReturn relative to average drawdown

12.94

11.37

+1.56

How much return does each position deliver for the risk it carries? Higher values mean better reward for the risk taken.

PositionRisk / Return RankSharpe ratioSortino ratioOmega ratioCalmar ratioMartin ratio
O
Realty Income Corporation
66
0.881.261.151.293.12
VOO
Vanguard S&P 500 ETF
67
1.992.701.362.7512.42

Sharpe Ratio

The Sharpe ratio helps investors understand how much return they're getting for the level of risk taken. A higher Sharpe ratio indicates better risk-adjusted performance, meaning more reward for each unit of risk. Learn how to interpret the Sharpe ratio.

The current 90/10 VOO/O Portfolio Sharpe ratio is 2.04 as of Jun 13, 2026 (the value is recalculated daily), calculated over the past 12 months.

Compared to the broad market, where average Sharpe ratios range from 1.53 to 2.41, this portfolio's current Sharpe ratio falls between the 25th and 75th percentiles. This indicates that its risk-adjusted performance is in line with the majority of portfolios, suggesting a balanced approach to risk and return—likely suitable for a wide range of investors.

The chart below shows the rolling Sharpe ratio of 90/10 VOO/O Portfolio compared to the selected benchmark. This view highlights how the investment's risk-adjusted performance has changed over time.

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Dividends

Dividend yield

90/10 VOO/O Portfolio provided a 1.46% dividend yield over the last twelve months.

PositionTTM20252024202320222021202020192018201720162015
Portfolio1.46%1.63%1.66%1.84%1.99%1.51%1.84%2.06%2.27%2.05%2.23%2.33%
Portfolio components:
O
Realty Income Corporation		5.16%6.19%5.37%5.33%4.68%3.87%4.51%3.69%4.19%4.45%4.18%4.41%
VOO
Vanguard S&P 500 ETF		1.05%1.13%1.24%1.46%1.69%1.25%1.54%1.88%2.06%1.78%2.02%2.10%

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 90/10 VOO/O Portfolio. 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 90/10 VOO/O Portfolio was 35.14%, occurring on Mar 23, 2020. Recovery took 107 trading sessions.

The current 90/10 VOO/O Portfolio drawdown is 2.01%.

Related event

Drawdown

Fall

Recovery

Underwater

COVID crash2020
-35.14%Mar 2020
1mo 2d5mo 4d
6mo 6dFeb 2020 - Aug 2020
Bear market2022
-24.00%Oct 2022
9mo 10d1y 2mo
1y 11moJan 2022 - Dec 2023
2011 correction2011
-18.16%Oct 2011
5mo 4d4mo 3d
9mo 7dMay 2011 - Feb 2012
2025 selloff2025
-18.02%Apr 2025
1mo 17d2mo 19d
4mo 6dFeb 2025 - Jun 2025
Rate-hike selloffLate 2018
-17.33%Dec 2018
3mo 4d2mo 24d
5mo 28dSep 2018 - Mar 2019

Volatility

Volatility Chart

The chart below shows the rolling one-month volatility.

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Diversification

Diversification Metrics

Number of Effective Assets

The portfolio contains 2 assets, with an effective number of assets of 1.22, reflecting the diversification based on asset allocation. Your allocation shows noticeable concentration: a few holdings carry significantly more weight than the rest. Rebalancing toward more even weights — or adding less correlated assets — could reduce risk.

Diversification Ratio
1Y
3Y
5Y
10Y
All Time
Diversification Ratio

1.13

1.10

1.07

1.07

1.06

The portfolio has a diversification ratio of 1.06, placing it in the bottom quartile across portfolios — positions are highly correlated. Consider adding assets from different classes or sectors to reduce risk.

90/10 VOO/O Portfolio correlation to the S&P 500 Index

90/10 VOO/O Portfolio has a 0.99 correlation to S&P 500 Index over the trailing 12 months. This section compares each holding's correlation to the benchmark and to the portfolio.
Correlation
Correlation (1Y)
Calculated over the trailing 1-year period

0.99

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

0.99

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

1.00

Correlation (10Y)
Calculated over the trailing 10-year period

0.99

Correlation (All Time)
Calculated using the full available price history since Sep 9, 2010

0.99

Benchmark Correlations

Correlation vs. S&P 500 Index. VOO has the highest benchmark correlation at 1.00, while O has the lowest at 0.37.

O
0.37
VOO
1.00

Portfolio Correlations

Correlation vs. 90/10 VOO/O Portfolio. VOO has the highest portfolio correlation at 0.99, while O has the lowest at 0.47.

O
0.47
VOO
0.99

Asset Correlations Table

The table below displays the correlation coefficients between the individual components of the portfolio, the entire portfolio, and the chosen benchmark.
OVOO
O1.000.37
VOO0.371.00
The correlation results are calculated based on daily price changes starting from Sep 9, 2010
Diversification Analysis

Find what 90/10 VOO/O Portfolio is missing

See which holdings overlap, where 90/10 VOO/O Portfolio is concentrated, and which low-correlation assets could fill the gaps.

Analyze Diversification