The Australian dollar will reach parity with the US dollar in the next six to 12 months and peak at about $US1.02-03, a currency strategist says. State Street Global Advisers head of currency management Collin Crownover says the unit is already overvalued by about 20 per cent and that the figure would stretch out to 30 per cent if it reached the $US1.03 mark. "I think we'll see about a 10 per cent appreciation from where we are now," the London-based Dr Crownover said in Sydney on Friday. "At that point, certain dynamics come into play and that becomes an...