Topic. 9: Types of trading strategies

1. Using of stock index in trading strategies

Stock indices have more than a hundred years used for the integrated assessment of the stock market. 

Based on the exchange stock indices also possible to analyze the economic system as a whole. 

Stock indices also allow investors to assess their portfolio. Almost all exchanges have their own system of aggregate indices that reflect the level and dynamics of prices.
Stock Exchange Index - a statistical average value calculated based on the exchange rate difference of securities included in the stock basket.
Stock indices are digital stats, expressing (usually a percentage) successive changes of certain phenomena. After a certain period of time the exchange difference stocks that make up the stock index recorded and used as the basis for calculation of these index values. Thus, the index is the ratio of comparable size to a certain value, which is taken as the base. 

Each index has the following characteristics:
- List Index (set-share representatives);
- The method of reduction to the average;
- Types of scales to share prices;
- Basic index;
 - Statistical base.
There are various types of indices, such as exchange indices calculated based on shares. Analytical company have in its arsenal, its indices. Indices may accrue as a large number of shares, and a small number. Stock indices are sometimes calculated as a weighted average, determined by considering not only the relative changes, but the absolute price of shares of companies that create the index basket. Yearly share price reflects the expectations of the exchange of the stock market because the stock indices can serve as a barometer of the future of the economic system. In world practice, using four methodological techniques for constructing indirect index changes of stock prices based on calculations for the corresponding period:
I. the rate of change of the arithmetic mean value of the share price of a number of selected corporations (Dow Jones)
II. the rate of increase (decrease) the arithmetic average (the number of shares outstanding) price of the majority shares of corporations (index "Standard and Poor" and "Uilshyr -5000");
III. serednoheometrychnoho value growth rate (decrease) equity prices;
IV. serednoheometrychnoho weighted rate of price change of shares (index "Velho Line").
The change index values ​​typically viewed as an indicator of demand in the market. Rising or falling index in one market often affects the state of demand on the other.
Currently, the emerging economies are more than 200 stock exchanges. Almost each of them has its own system of stock exchange indexes.
The US regularly published data on 20 indices in Europe - 25 in Japan - on 3. Have your exchange indexes in Latin America and Asia. The most widely used in the world index, developed in the United States. This is due to the fact that the daily turnover of only the New York Stock Exchange (NYSE) for a long time was half the world's securities turnover.
The most famous and the very first index is the Dow Jones, which zvyvsya in 1884 as the average market value changes 11 big industrial companies. The idea of ​​calculating exchange stock index belongs to Charles Henry Dow, who was then editor of "Wall Street Journal". Using this index could characterize the US economy as a whole. Apparently the idea was quite original and even now this index has been used successfully in the stock market of the stock of the New York Stock Exchange. Modern Dow has four options:
- Industrial index, which is calculated at the rate of 30 industrial companies;
- Transport index - an indicator of exchange 20 prominent transportation companies;
- An index for the 15 utility companies;
- Aggregate index, which is calculated on the basis of the above 65 companies.
Dow Jones is calculated as the arithmetic average of the rate of selected companies, namely as follows:
DJIA = Pi / D
where
Pi - course and first asset;
D - divider, which reflects the rotation companies and change the number of their shares. Today it is 1.5 points.
Equally well known is the American index Standard and Poor index - S & P 500, which includes 400 industrial companies, 20 vehicles, 40 financial and 40 public. The calculation of the index used by arithmetic average number of shares of the above mentioned companies:
S & P 500 = PiQi / Pib.Qib. 
where
P - first rate and the asset;
Q - amount of the asset during a certain time.

For ease of use the index multiplied by 10 - base value.
Along with the above indices in the world uses a large number of stock indices, the most popular among investors and stock analysts is below these indices (tabl.9.1).
Thus, we can see that in the world practice, a large number of stock stock indices. Moreover, every country in the world in its use has several stock indices as exchange and OTC. All listed indexes are used in market research, the analysis of exchange trade, assessment of and prospects for the development of industries, etc. But for the organization of exchange trade must count the cash share price (current rate) on the basis of which is trade.
Stock indices are changing under the influence of a large number of factors:
• Economic and political stability;
• inflation;

• magnitude of interest on loans;
• Dimensions paid interest on deposits and dividends;
• risk investments;
• developing a network of financial institutions, their reliability;
• investment opportunities, etc.
The main requirements for the exchange of stock indices are:
• Change display exchange of shares on the stock exchange;
• vklyuchannya sufficient number of shares to adequately reflect the state of the stock exchange market;
• display the status of a particular issuer in equal conditions compared to other issuers whose shares are included in the index.