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text Courtesy Of Wikipedia
In finance, a stock market index future is a cash-settled futures contract on the value of a particular stock market index.
Contents [hide]
1 Market
2 Uses
3 Pricing
4 See also
5 Notes
[edit]Market
The turnover for the global market in exchange-traded equity index futures is notionally valued, for 2008, by the Bank for International Settlements at USD 130 trillion[1].
[edit]Uses
Stock index futures are used for hedging, trading, and investments.
Hedging using stock index futures could involve hedging against a portfolio of shares or equity index options.
Trading using stock index futures could involve, for instance, volatility trading (The greater the volatility, the greater the likelihood of profit taking – usually taking relatively small but regular profits).
Investing via the use of stock index futures could involve exposure to a market or sector without having to actually purchase shares directly.
Please note the following cases of equity hedging with index futures:
Where your portfolio 'exactly' reflects the index (this is unlikely). Here, your portfolio is perfectly hedged via the index future.
Where your portfolio does not entirely reflect the index (this is more likely to be the case). Here, the degree of correlation between the underlying asset and the hedge is not high. So, your portfolio is unlikely to be 'fully hedged'.
Equity index futures and index options tend to be in liquid markets for close to delivery contracts. They trade for cash delivery, usually based on a multiple of the underlying index on which they are defined (for example £10 per index point).
OTC products are usually for longer maturities, and are usually a form of options product. For example, the right but not the obligation to cash delivery based on the difference between the designated strike price, and the value of the designated index at the expiration date. These are traded in the wholesale market, but are often used as the basis of guaranteed equity products, which offer retail buyers a participation if the equity index rises over time, but which provides guaranteed return of capital if the index falls. Sometimes these products can take the form of exotic options (for example Asian options or Quanto options).
[edit]Pricing
Forward prices of equity indices are calculated by computing the cost of carry of holding a long position in the constituent parts of the index. This will typically be
The risk-free interest rate, since the cost of investing in the equity market is the loss of interest
Minus the estimated dividend yield on the index, since an equity investor receives the sum of the dividends on the component stocks. Since these occur at different times, and are difficult to predict, estimation of the forward price can be difficult, particularly if there are not many stocks in the chosen index.
Indices for futures are the well-established ones, such as S&P 500, FTSE, DAX, CAC40 and other G12 country indices. Indices for OTC products are broadly similar, but offer more flexibility.
