On a given pricing date t, the weighted-average yield curve WAYC_{t} gives an idea of the risk free rates that have been used in discounting cash flows. Computation-wise, it is the weighted-average of the yield curves YC_{t,i} used to discount the cashflows of each constituent i. For a single country index e.g. the UK index, WAYC_{t} is the same as the yield curve for that country.

WAYC_{t} = \sum_{i=1}^{n} (YC_{t,i} * w_{t,i}) |

where:

w_{t,i} denotes the weight of constituent *i* at time *t*