Fontes.

   As fontes básicas são os jornais do mundo inteiro, sites de bolsas de valores e alguns sites específicos que posso citar quando for o caso.

    http://www.guiademidia.com.br/jornaisinternacionais.htm

    http://noticias.uol.com.br/jornais/

    http://www.onlinenewspapers.com/portuguese-index.htm

    http://www.bmfbovespa.com.br/home.aspx?idioma=pt-br

    https://www.nyse.com/index

    http://www.londonstockexchange.com/exchange/prices-and-markets/stocks/indices/summary/summary-indices.html?index=UKX

    http://br.investing.com/indices/major-indices

    http://indexes.nikkei.co.jp/en/nkave

    http://www.boerse-frankfurt.de/en/equities/indices/dax+DE0008469008

    http://english.sse.com.cn/

    http://www.twse.com.tw/en/products/indices/tsec/taiex.php

    http://www.twse.com.tw/en/products/indices/tsec/taiex.php

    http://moex.com/en/index/RTSI

    https://www.google.com/finance

    http://www.portaldoinvestidor.gov.br/menu/Menu_Investidor/sistema_distribuicao/mercados_regulamentos.html