Caches all the symbols by a certain tag.

        For now, there is no different, than 
        caching each symbol individually.  In the future,
        this functionality could have speed improvements.

        Parameters
        ----------
        tag : str
            Use '%' to enable SQL's "LIKE" functionality.

        Returns
        -------
        TrumpReport

def bulk_cache_of_tag(self, tag):
        """ Caches all the symbols by a certain tag.

        For now, there is no different, than 
        caching each symbol individually.  In the future,
        this functionality could have speed improvements.

        Parameters
        ----------
        tag : str
            Use '%' to enable SQL's "LIKE" functionality.

        Returns
        -------
        TrumpReport
        """

        syms = self.search_tag(tag)
        
        name = 'Bulk Cache of Symbols tagged {}'.format(tag)
        tr = TrumpReport(name)
        for sym in syms:
            sr = sym.cache()
            tr.add_symbolreport(sr)
        
        return tr