澳大利亚通胀下降导致澳元冲高！

The consumer price index (CPI) remained unchanged in Australia in the December quarter, for an annual inflation rate of 3.1 per cent, down from 3.5 per cent previously, the Australian Bureau of Statistics said today.
澳大利亚第四季度消费者物价指数维持不变，年通胀率从3.5%下降至3.1%。该时段，澳元/美元从1.0445升至1.0520。
Economists' forecasts for the headline CPI had centred on a rise of 0.2 per cent in the quarter, for an annual pace of 3.3 per cent.

The latest official forecast from the Reserve Bank of Australia (RBA), in November, was for annual inflation of 3.25 per cent through 2011.

通胀下降，理论上来说，澳币应该跌，请问怎么会是上涨了呢？