index-linked
adjective UK uk/ˌɪn.deksˈlɪŋkt/ us/ˌɪn.deksˈlɪŋkt/ (US indexed)
（投资、政府支出等）与物价指数挂钩的
An index-linked investment or government payment changes by the same amount as the general level of prices.
an index-linked pension/benefit 与物价指数挂钩的养老金／福利