Exchange-traded funds, a relatively new type of listed portfolio, already offer exposure to everything from “sin stocks” to companies that align with the teachings of the Catholic Church. Now, savers will be able to invest via political preference too, thanks to a number of new ETFs.

They include a fund that invests in companies that stand to benefit from President Trump’s policies and a “European Union Breakup” fund.

Point Bridge’s "GOP Stock Tracker" ETF, which listed earlier this year, tracks a custom-made index that consists of companies that “are highly supportive of Republican candidates for election”, according to Point Bridge’s filing with the US regulator. GOP means Grand Old Party - the Republicans.

The bespoke index starts with the S&P 500 index of America’s largest companies, then screens and ranks them on the basis of the total amount donated by each firm’s employees and political action groups to Republican candidates for office during the last two election cycles.