Generally speaking, stocks prices react to economic and financial news. It is therefore important to regularly follow not only the news of the financial markets, but also those related to the selected securities. The European markets often follow the trend of the American stock markets of the previous day. The Asian markets give the trend at the beginning of the day. Bloomberg, Reuters and Telekurs are official and well known providers of financial information. Many television channels specialize in financial information. In addition, there are many websites that provide access to information.