The analysis of securities with usefulness of information about its fundamental power can be an essential element of investment. Investment is a complex and, very frequently, long-lasting process. The assumptions being long-term investment, more useful are methods of fundamental analysis (particularly indicator analysis). Additionally, more frequently within securities' analyses taxonomic methods are used, some of them allows for the evaluation of the securities' quality through the prism of level of synthetic measure (e.g linear ranking methods). A similar opportunity to evaluate securities gives fundamental power index (FPI), which construction not uses taxonomic methods. (It must be say that in some linear ranking methods the size of synthetic measure is treated as a level of fundamental strength of the company.) Both approaches used to assess the companies' fundamental strength different kind of information (quantitative, qualitative factors and its combination) which came directly from the companies or/and which appear outside of them, but could have influence on their prosperity. Qualitative factors in contrast to the quantitative factors are discussable in assessment and their clear identification is difficult. So, it is easier to use quantitative information in assessment tools like fundamental power index regardless of the methodology of its construction. Especially quantitative factors are based on the economic and financial indicators, which came directly from the company. These indicators define in a numerical manner the relations between economic and financial values, for conclusions on the condition of the examined economic entities. Financial and economic condition is equivalent to fundamental power of the companies. Information about fundamental strength can be used not only in investment process. It gives possibility to get to know many elements, like:

• level of development of the companies on the capital market or its part,
• the market or its part level of development (through the prism of the companies level of development),
• differences between companies or sectors from its fundamental strength point of view.

Besides of that, there appear a few crucial questions:

• how do the economic and financial indicators rule on the stock market?
• what is their level, do they maintain the norms?
• what is the quality of data on the basis of which securities' analyses are carried out?

The answer to these issues is possible through the use some of statistical methods. The main goal of the paper is analysis of fundamental power of the companies listed on Warsaw Stock Exchange (WSE) by using fundamental power index (FPI) and information which create them (in space and time). The research refers to period 2007–2012.

• JEL C10, JEL G10

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