
The CBOE S&P 500 BuyWrite Index is a financial instrument that allows investors to generate income from their stock portfolios. It's a type of exchange-traded note (ETN) that tracks the performance of the S&P 500 Index.
The index is designed to provide a hedge against market downturns by selling call options on the underlying S&P 500 stocks. This strategy is also known as a "buy-write" or "sell-write" strategy.
The CBOE S&P 500 BuyWrite Index seeks to replicate the performance of the S&P 500 Index, but with a twist: it generates income from the premiums received from selling call options. This can be a attractive option for investors looking to add a regular income stream to their portfolios.
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What is the CBOE S&P 500 BuyWrite Index?
The CBOE S&P 500 BuyWrite Index is a financial product that combines the S&P 500 Index with a call option strategy. It's designed to generate income for investors.
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The index is based on a strategy where investors sell call options on the S&P 500 Index, earning premiums from the option sales. This strategy is also known as a covered call.
The CBOE S&P 500 BuyWrite Index is a benchmark for this type of strategy, providing a way to measure its performance. It's calculated using a formula that takes into account the S&P 500 Index and the premiums earned from selling call options.
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Benefits
The CBOE S&P 500 BuyWrite Index, or BXM, offers a benchmark for investors who want to use a buy-write strategy. This allows them to compare their performance to a standard measure.
By using the BXM, investors can see how well their strategy is doing over time. It provides a clear picture of their progress.
The BXM also helps reduce volatility by offsetting losses from a fall in the S&P 500 index with income from selling call options.
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How It Works
The CBOE S&P 500 BuyWrite Index, or BXM, is a clever investment strategy that can help enhance portfolio returns and reduce volatility.
To implement a buy-write strategy, an investor first needs to buy the stocks in the S&P 500 index, which can be done by buying an ETF that tracks the S&P 500 index.
The BXM is calculated by applying a buy-write strategy to the S&P 500 index, which involves buying all the stocks in the index and then writing call options against the index.
The call options are written at the money, meaning the strike price of the options is the same as the current price of the index. This is a key part of the strategy, as it allows the investor to collect a premium from selling the options.
The income generated from selling the call options is added to the total return of the S&P 500 index to calculate the return of the BXM. This can be a significant boost to the investor's returns, especially in a rising market.
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The BXM is calculated and disseminated on a daily basis, using closing prices of the respective cash index and the closing price of the selected option call.
Portfolio managers have been using buy-write strategies for over 25 years to provide incremental income and boost risk-adjusted returns.
The CBOE BuyWrite indexes are available to view on the CBOE website, making it easy for investors to track the performance of the BXM and other buy-write indexes.
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Limitations and Considerations
The CBOE S&P 500 BuyWrite Index, or BXM, is a useful benchmark, but it's not without its limitations. It assumes that investors can sell call options at the money and at the current market price, which may not always be possible.
Transaction costs can also reduce the return of the strategy. The cost of buying the stocks and selling the options can eat into the investor's profits.
The BXM also assumes that investors can reinvest the income from selling the options, which may not always be feasible. This can be a challenge, especially for those with limited financial resources.
In reality, investors may not be able to sell the options at the money and at the current market price, which can reduce the income from the strategy. This can be a significant limitation, especially in times of high market volatility.
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Trading and Strategy
The CBOE S&P 500 BuyWrite Index is a powerful tool for investors looking to implement a buy-write strategy. This involves buying stocks in the S&P 500 index and then writing call options against the index.
Key users of the BXM include asset managers, hedge funds, pension funds, banks, and proprietary trading firms, who use it to simplify transaction costs and operational complexities. They can also use it to implement a buy-write strategy.
To implement a buy-write strategy, you can buy an ETF that tracks the S&P 500 index and then sell call options on an ETF that tracks the S&P 500 index. The options should be written at the money, with a strike price equal to the current price of the ETF.
Here are the key details about the BXM futures contract:
The BXM is a passive total return index based on selling the near-term, at-the-money S&P 500 Index call option against the S&P 500 stock index portfolio each month.
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Key Users
Key Users of S&P 500 BuyWrite Index Futures and Options include asset managers and hedge funds seeking risk management and hedging strategies.
These key users are looking for alternative ways to trade on the S&P 500, and the contracts offer a simplified solution to direct covered call trading.
Asset managers and hedge funds are not the only ones, corporate treasury operations are also key users of the contracts, seeking to manage risk and discover prices.
The contracts are particularly useful for those seeking to write options on the S&P 500, as they offer a streamlined process for doing so.
Here are the types of key users mentioned in the article:
- Asset managers
- Hedge funds
- Pension funds
- Banks
- Risk parity and volatility-targeted funds
- Proprietary trading firms
- Corporate treasury operations
Using in Trading
Using the BXM in Trading can be a great way to implement a buy-write strategy. This involves buying the stocks in the S&P 500 index and then writing call options against the index.
The BXM can be used to simplify transaction costs and operational complexities, as it offers an alternative to direct covered call trading on the S&P 500. Key users of the BXM include asset managers, hedge funds, and proprietary trading firms.
To implement a buy-write strategy, an investor first needs to buy the stocks in the S&P 500 index, which can be done by buying an ETF that tracks the S&P 500 index. The options should be written at the money, which means the strike price of the options is the same as the current price of the ETF.
The BXM is a passive total return index based on selling the near-term, at-the-money S&P 500 Index call option against the S&P 500 stock index portfolio each month. The premium collected from the sale of the call is added to the portfolio's total value.
Here are the key benefits of using the BXM in trading:
- Lower risk than other strategy indexes
- Lower volatility than the S&P 500
- Potential for incremental income to boost risk-adjusted returns
- A cushion against downside losses
The BXM can be used in trading to implement a buy-write strategy, which involves buying the stocks in the S&P 500 index and then writing call options against the index. This strategy can be used to enhance portfolio returns and reduce volatility.
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Performance and History
The CBOE S&P 500 BuyWrite Index has been around since 2002, launched to track the theoretical performance of owning the S&P 500 Index while systematically selling one-month at-the-money S&P 500 call options.
The index has a strong performance history, with a return of 141.15% since inception. In the current year, it has a performance of 2.09%.
The index has experienced a high of 122.27% over the past year, but also a maximum loss of 7.44%. Its average return over the past year is 2.02%, with an average gain of 2.52% over the past five years.
Here's a breakdown of the index's performance over different time periods:
The index's R-Squared value is 57.60% over the past year, indicating a moderate level of correlation with the S&P 500 Index.
Awards
CBOE received the Most Innovative Benchmark Index distinction for the CBOE S&P 500 BuyWrite Index (BXM) in December 2004 at the Super Bowl of Indexing Conference. This achievement highlights the company's commitment to innovation in the field of indexing.
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Performance

The performance of an investment can be a crucial factor in determining its overall value. The current performance of this investment is 2.09% in the current year.
In terms of its overall performance since inception, this investment has seen a staggering 141.15% return. This is a significant indicator of its long-term potential.
The highest return seen in the past year was 122.27%, while the maximum loss was a relatively low -7.44%. This suggests that the investment has been relatively stable over the past year.
Here's a breakdown of the investment's performance over different time periods:
The investment's performance has been consistent over the years, with a 2.20% average gain over the past 3 years. This is a testament to its reliability and stability.
The investment's beta, which measures its volatility relative to the market, has been relatively low, ranging from 0.46 to 0.63 over the past 10 years. This suggests that the investment has been a relatively safe bet.
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The capture ratio, which measures the investment's ability to capture market gains, has been around 50-60% over the past 10 years. This is a respectable figure, indicating that the investment has been able to capture a significant portion of the market's gains.
The correlation between the investment and the market has been high, ranging from 75.90% to 87.72% over the past 10 years. This suggests that the investment has been closely tied to the market's performance.
The tracking error, which measures the investment's deviation from the market's performance, has been relatively low, ranging from 7.49% to 8.82% over the past 10 years. This suggests that the investment has been able to closely track the market's performance.
The investment's trailing performance over the past year has been 8.10%, while its trailing return over the past year has been 7.99%. These figures suggest that the investment has been performing well over the long term.
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History
The Cboe S&P 500 BuyWrite Index (BXM) was launched in 2002 to track the theoretical performance of owning the S&P 500 Index while systematically selling one-month at-the-money S&P 500 call options.
This innovative index was created to meet the growing demand among institutional and hedge fund investors for discrete option-overwrite exposure without managing the physical index and rolling options directly.
The BXM was a response to the need for a more efficient and direct way for investors to gain or hedge exposure to the covered call strategy via regulated futures markets.
CBOE S&P 500 BuyWrite Index Futures were later introduced to provide investors with a direct and efficient vehicle to gain or hedge exposure to the BXM covered call strategy.
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Related Topics
The CBOE S&P 500 BuyWrite Index has some key differences when compared to other popular indexes like the S&P 500.
The BXM typically has a lower return than the S&P 500, which is due to the income from selling options being added to the return calculation.
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Its lower risk profile can make the BXM a more stable investment option, especially in volatile market conditions.
The income from selling options can help offset losses from a fall in the price of the S&P 500, which can be a significant advantage for investors.
The BXM's lower volatility can make it a more suitable choice for investors who are risk-averse or want to reduce their exposure to market fluctuations.
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