The Australian dollar on Friday dropped below greenback parity for the first time since October 12 as traders exit high-risk currencies. The \"Aussie\" fell as low as 99.70 US cents overnight, but recovered slightly to be exactly at parity at 8.55am (2155 GMT). GFT Forex director of currency research Kathy Lien said there had been an exodus out of high-risk, high-yield currencies, like the Australian dollar in the past week. \"This weakness in the Aussie has all to do with the continued tensions in the eurozone,\" Lien said.