Popular tech stocks are being driven by the average investor, not by professionals By: MarketWatch October 23, 2017 at 13:13 PM EDT Pro investors will only buy more if one of three things happen, says Nigam Arora. Read More >> Related Stocks: Adv Micro Devices Alibaba Group Holding Ltd Alphabet-A Alphabet-C Amazon.com Apple Facebook Microsoft NVIDIA Corp Netflix Tesla, Inc.