Although they have recovered some recently, FANG , the acronym for tech giants Facebook ( FB ), Amazon ( AMZN ), Netflix ( NFLX ), and Google (Alphabet) ( GOOG ), has lost some of its market performance preeminence, according to experts. Collectively the group is down nearly half a trillion dollars in market value since each stock’s 52-week high. Google has been the biggest decliner, decaying $173 billion since April.