Investor Choice Act of 2017 This bill amends the Securities Exchange Act of 1934 and the Investment Advisers Act of 1940 to prohibit a broker, dealer, funding portal, municipal-securities dealer, or investment adviser from entering into, modifying, or extending an agreement with a customer or client if that agreement: (1) mandates arbitration with respect to a future dispute between the parties; (2) restricts or limits the ability of the customer or client to select a forum for the resolution of such a dispute; or (3) restricts or limits the ability of the customer or client to pursue, in an individual capacity or on a class-action basis, a claim relating to such a dispute.