RBA's interest rate increase inspires world markets; Iron ore exports on the rise; NZ taxman chases Westpac for $825m; Alcoa to keep up competition pressure; Labor backflip on GST relief

RBA's interest rate increase inspires world markets; Iron ore exports on the rise; NZ taxman chases Westpac for $825m; Alcoa to keep up competition pressure; Labor backflip on GST relief