India is in negotiations with at least 8-9 more groups of countries and individual nations that together account for another $15 trillion of GDP, Commerce and Industry Minister Piyush Goyal said on Monday.

India has a large domestic market and it has opened its doors to the world with nine free trade agreements signed in the last four years, he said addressing business representatives from India and Japan. 
These nine agreements cover economies with a combined GDP of $60 trillion and 38 developed countries.