Cboe DJIA BuyWrite Index (BXD) www.cboe.com/BXD

The Cboe DJIA BuyWrite Index (BXD) is a benchmark index that measures the performance of a theoretical portfolio that sells DJX call options, against a portfolio of the stocks included in the Dow Jones Industrial AverageSM (the Dow).

A "buy-write," also called a covered call, generally is considered to be an investment strategy in which an investor buys a stock or a basket of stocks, and also sells call options that correspond to the stock or basket of stocks. This strategy can be used to enhance portfolio returns and reduce volatility.

Consultant's Study on the Cboe DJIA BuyWrite Index (BXD)

In 2007 the Fund Evaluation Group (FEG) issued a new study entitled "Evaluation of BuyWrite and Volatility Indexes - Using the Cboe DJIA BuyWrite Index (BXD) and the Cboe DJIA Volatility Index (VXD) for Asset Allocation and Diversification Purposes." The paper studied the 109-month period from October 1997 to November 2006. The FEG study presented several findings on the 9-year performance of the BXD Index, including:

  • Diversification and Reduced Volatility. The volatility of the BXD was 25% less than that of the DJIA and 46% lower than the Russell 2000. The study found that if an investor had allocated 25% of an otherwise all-stock portfolio to the BXD, the portfolio volatility would have declined by about 9%.
  • Income Generation. Selling index options 12 times per year can produce significant income. Over the 109-month period studied, the average monthly options premium received was 1.84%, or an annualized rate of 24.46%.
  • Improved Risk-Adjusted Returns. Incorporating a 10% allocation to the BXD could have improved the risk-adjusted returns (as measured by the Sharpe Ratio) of all four comparative portfolios studied (i.e., all-stocks, all fixed income, aggressive and conservative portfolios).

Updated Price Charts


Links to More Information on the BXD Index

News Release - Study Issued by Fund Evaluation Group on The Cboe DJIA BuyWrite Index (BXD), Cboe DJIA Volatility Index (VXD), and Impact on Risk-Adjusted Returns

News Release - Cboe To Begin Disseminating Two New Indexes Based On The Dow Jones Industrial Average: Cboe DJIA Volatility Index and Cboe DJIA BuyWrite Index

BXD Daily Price History (.csv format)

More Discussion of Buy-Write Strategies and the BXD Index

Buy-Write strategies provide option premium income that can help cushion downside moves in an equity portfolio, but Buy-Writes often under perform stocks in rising markets. Thus, some Buy-Write strategies significantly outperformed stocks in 2000 - 2002 when the DJIA year-end price fell three years in a row, but Buy-Writes tended to underperform stocks in the late 1990s when the DJIA rose by more than 15% per year. Buy-Write strategies have an added attraction to some investors in that Buy-Writes can help lessen the overall volatility in many portfolios.

In 2002 the Cboe Options Exchange (Cboe) commissioned Professor Robert Whaley to develop the methodology for a benchmark index designed to reflect buy-write performance

The Cboe DJIA BuyWrite Index (BXD) is a benchmark index designed to track the performance of a hypothetical buy-write strategy on the DJIA. Announced in 2005, the BXD Index was created by Cboe under an agreement with Dow Jones & Company, Inc., and is based on prices of Options on the Dow (DJX), traded at Cboe. The BXD is a passive total return index based on (1) buying a DJIA stock index portfolio, and (2) "writing" (or selling) the near-term DJX Index "covered" call option, generally on the third Friday of each month. The DJX call written will have about one month remaining to expiration, with an exercise price just above the prevailing index level (i.e., slightly out of the money). The DJX call is held until expiration and cash settled, at which time a new one-month, near-the-money call is written. Data on daily BXM prices is available from October 16, 1997 to the present from options price quote vendors and at www.cboe.com/bxd (see the link Excel spreadsheet above).

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The BXM, BXD, BXN, BXY, CLL and PUT indices (the "Indexes") are designed to represent proposed hypothetical options strategies. The actual performance of investment vehicles such as mutual funds or managed accounts can have significant differences from the performance of the Indexes. Investors attempting to replicate the Indexes should discuss with their advisors possible timing and liquidity issues. Like many passive benchmarks, the Indexes do not take into account significant factors such as transaction costs and taxes. Transaction costs and taxes for strategies such as the Indexes could be significantly higher than transaction costs for a passive strategy of buying-and-holding stocks. Investors should consult their tax advisor as to how taxes affect the outcome of contemplated options transactions. Past performance does not guarantee future results. This web page contains index performance data based on back-testing, i.e., calculations of how the index might have performed prior to launch. Backtested performance information is purely hypothetical and is provided in this web page solely for informational purposes. Back-tested performance does not represent actual performance and should not be interpreted as an indication of actual performance. It is not possible to invest directly in an index. Cboe calculates and disseminates the Indexes. Supporting documentation for any claims, comparisons, statistics or other technical data is available from Cboe upon request. The methodologies of the Indexes are the property of Cboe Options Exchange, Incorporated (Cboe).