@classmethod
def quotes_by_instrument_urls(cls, client, urls):
    """
        fetch and return results
        """
    instruments = ','.join(urls)
    params = {'instruments': instruments}
    url = 'https://api.robinhood.com/marketdata/quotes/'
    data = client.get(url, params=params)
    results = data['results']
    while 'next' in data and data['next']:
        data = client.get(data['next'])
        results.extend(data['results'])
    return results
