The answer is basically algo trading and value investing of ETFs. The number of folks on Wallk Streeet who lost jobs in the thousands. Here is the description of this 15 minute CNBC video:
Wall Street trading used to happen on the phone or in person in the packed trading pits at Chicago Mercantile Exchange, New York Stock Exchange or London Stock Exchange. Today, trading requires less people thanks to new technology. Here’s what led to the decline of traders on Wall Street.FACEBOOK ACCOUNT and TWITTER. Don't worry as I don't post stupid cat videos or what I eat!