Yahoo finance experiments
The aim of this experiment is to map economic structures of a companies collection. To extract data from the firms a wrapper that collects financial data has implemented. This analysis uses the following data from yahoo finance: company names, identifier labels (quotes) and activities description. For each collection of companies two types of maps is produced:
- core competencies
- and relations between companies (these map analyze the companies competitition).
The selection of companies collection were made using various indexs and classifications defined in yahoo finance. We analyzed sets of companies which belongs to the spanish continuous market, Standard & Poor's 100, Standard & Poor's 1500 and a mix of technological indexs and clasifications. Follow we described the process:
- Sellect a collection companies collecting information from the indexs and/or classifications of yahoo finance.
- Generate an index of names and activities of each company.
- Network type 1 calculation:
- Extract the terms of the business activities descriptions.
- Select terms relating to products or services offered by companies (core competencies)
- Calculate the co-occurrence between terms and filter the network using the pathfinder algorithm.
- Plot the core competencies network.
- Network type 2 calculation:
- Calculate the relationships between companies. This process exploits the conflict of interest between business activities. This reuses the terms list used to calculate the previous network. The list of terms will calculate a similarity index based on the co-occurrence of terms in the activities of the companies analyzed.
- Plot the co-occurrence network filtered by the pathfinder algorithm.
Maps collection:
- Bolsa española: cores [png], 148 firms [png].
- S&P100: cores [png], 100 firm [png].
- S&P1500: cores [png], 1500 firms [png].
- Technology mix: cores [png], 122 firms [png]. Components:
Morgan Stanley Internet Index (^MOX), Morgan Stanley High-technology
(^MSH), Software holdrs index (^XWH), Dynamic Tech Sector Intellidex
(^EZV), Dynamic Software Intellidex (^DZC)
- Software technology sector: cores [png], 4122 firms [png] Components:
Application Software, Business Software & Services, Computer Based
Systems, Diversified Computer Systems, Healthcare Information Services,
Information & Delivery Services, Information Technology Services,
Internet Information Providers, Internet Service Providers, Internet
Software & Services, Long Distance Carriers, Multimedia &
Graphics Software, Networking & Communication Devices, Personal
Computers, Processing Systems & Products, Security Software & Services y Technical & System Software.
Note: For extract maps have been used TREDAR. TREDAR is environment that allow implements process to integrate different information sources and extract knowledge from them.
 
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