Amid mounting discontent in Washington, D.C. over so-called inversions, in which U.S. companies lower their taxes by relocating to a foreign country, a new online broker called Motif Investing has created a tool that allows investors to purchase stock in 25 companies that are potential inversion targets.

Motif provides investors with the option to buy groups of stocks organized around specific categories, including one known as Tax Inversion Targets. This category includes a combination of small and large-cap companies, as well as those that were already targets of or have taken part in inversion deals, The New York Times reports.