Could the yield curve for municipals ever lie above the yield curve for government securities? (Hint: Consider all tax rates.) What effect would an increase in marginal tax rates have on the position...

Could the yield curve for municipals ever lie above the yield curve for government securities? (Hint: Consider all tax rates.) What effect would an increase in marginal tax rates have on the position of the yield curve for municipals?

Interest rates are going up. What happens to the prices of previously issued bonds?