free trade 
noun [mass noun]
International trade left to its natural course without tariffs, quotas, or other restrictions: an agreement intended to introduce free trade in marine products [as modifier]: a free trade zone...
- Anger in Europe over this latest trade dispute has raised fears that ongoing free-trade negotiations could be derailed.
- If finalised, the accord will represent the first free-trade pact made by Japan.
- So far, Australia has inked free-trade pacts with New Zealand and Singapore.