Date: December 2012: aukeepeyeonsupportbreakdec21.gif (1574×728)

The Australian $ has a decent track record per being a leading indicator for the S&P 500. Over the past few years, breakdowns in the AU$ has resulted in weakness by the S&P 500.  
This morning the AU$ is attempting to break support that dates back to the lows hit this past May. One day does not make a trend, so keep a close eye on where the AU$ heads from here, because it could help you with portfolio construction in a big way!