# How to define world interest rate using IS-LM-BP diagram?

Can you suggest where is the world interest rate in the economy which has a positive current account and a financial account surplus, fixed exchange rate and relative capital immobility? The graph of this should look like this: Since NX and FA are positive, BP line is righter than the intersection of IS and LM curves, so $$i_0$$ is the country's interest rate, but what is the world's one?

• What is the BP line? – Brennan Apr 19 at 7:21
• BP = BOP (Balance of payment) = NX + FA – student Apr 19 at 7:26