TD Ameritrade's IMX Index Rose 6% In October By: Benzinga via Benzinga November 08, 2016 at 10:25 AM EST TD Ameritrade Holding Corp. (NASDAQ: AMTD) maintains a proprietary index called the TD Ameritrade's Investor Movement Index (IMX). The ... Read More >> Related Stocks: AT&T Inc Amazon.com Amtd Idea Group Apple Bank of America Caterpillar Citigroup Facebook Ford Motor General Electric Halliburton Co Netflix Southwest Airlines Verizon Communications Yahoo