Lots of red in Wall Street with all indices except the NDX closing down. One tech stock that shined after hours was Cisco (CSCO) after posting an earnings beat and optimistic outlook, topped with a hefty share buyback. However, Vertiv Holdings (VRT) sold off when investors weren't sold by its guidance. On a brighter note, CVS Health (CVS) saw its biggest rally since 2008. Caroline Woods takes us through the day's biggest earnings movers.