For stock index is known to those instruments which have in the bag to know the prices of the shares that are quoted.

IBEX 35

It is the index of the Stock Exchange of Madrid and other Spanish as the Barcelona and Bilbao. It consists of the 35 most representative values of the Spanish market.

It is reviewed every six months to take place in early January and July.. It is calculated with a weighted average capitalization approach through effective.

Down Jones

Stock index is the oldest of all. It consists of 30 American companies from the NYSE, except Microsoft and Intel as part of the Nasdaq.

It was estimated with an arithmetic average, but has added a splitter. Revisions are made only when there have been significant changes or acquisition.

Nasdaq 100

This is an index that reflects the American 100 largest software companies, hardware, telecommunications, wholesale and retail and biotechnology of the New York Stock Exchange.

It is calculated according to weight capitalization. This index is reviewed on a quarterly basis by a committee. The composition of the members are elected annually.

Xetra DAX

It is the index of the Frankfurt Stock Exchange. He was also known as the DAX 30 because it is composed of the 30 most important values of the German stock exchange.

It is calculated with a weighted arithmetic average capitalization, which may not exceed 20%. The revisions are made in September of each year.

Finantial Times 100

This is the main index of England and has the 100 leading companies in the stock market in that country. The weighting is based on the criterion of capitalization.

It is also known as FTSE and more popularly as Footsi. His review is the first Friday of each quarter.

Nikkei 225

This is the Japanese market stock index composed of the 225 most liquid securities from the Tokyo Stock Exchange. His calculation is performed like the Down Jones.

This is a bag with ample liquidity. Revisions of the components are made annually and become effective in October.

CAC 40

It is composed of  40 securities with higher capitalization and volume of the 100 existing in the French stock market.

It is calculated with a weighted average capitalization as the criterion. There is a policy to regulate members of the index.