To amend title 5, United States Code, to provide for certain index fund investments from the Postal Service Retiree Health Benefits Fund, and for other purposes.

Postal Service Financial Improvement Act of 2017 This bill requires the Department of the Treasury to: (1) invest a specified percentage of the Postal Service Retiree Health Benefits Fund, using one or more qualified professional asset managers, in index funds modeled after those established for Thrift Savings Fund investments; and (2) ensure that the investment...