currency peg

US /ˈkɝː.ən.si peɡ/
UK /ˈkɝː.ən.si peɡ/
"currency peg" picture
1.

a policy in which a country's currency value is fixed against the value of another single currency or a basket of other currencies

:
Many countries use a currency peg to stabilize their exchange rates.
The central bank decided to maintain the currency peg despite economic pressures.