@Override
	public List<IQuote> getQuotes(String[] codigoAtivo) throws Exception {
		List<IQuote> lista = new ArrayList<IQuote>();
		for (int i = 0; i < codigoAtivo.length; i++) {
			IQuote quote = getQuote(codigoAtivo[i]);
			if (quote != null) {
				//only valid quotes.
				lista.add(quote);
			}
		}
		return lista;
	}