Quote from Darren Boyer:
To me the S&P may not be the best perspective to view the USD from. As a currency with safehaven status, the best equity market of the 90's and a great bond rally over the last 8 yrs. That was likely the time to do some serious correlation analysis between equities & the currency.
Today however, there is far more interest and capitilization in the bond market. I recently jotted down a statistic that 30% of the Tsy. market is held by Asian central banks alone. I haven't checked whether that's accurate or not but it is an example how the USD has bigger influences than equities.
Suppose your a foreign bondholder and the currency just fell 15+% over the last 12 months? What's your opinion on the USD? The flow of funds over the last 12 months shows inflow trends have reveresed in equities and greatly slowed with bonds and I don't recall what the USD positions were but it wasn't wildly bullish that's for sure.
My point is when the market was hot that was the time to pull out the USD/equity correlation studies IMHO. Today requires a different approach. To a foreign fund manager or investor there is no way he's going to overweight the US equity markets. So the inflows have to come from trade, bond markets, or safe haven buyers or sellers. There's where I would start modelling and should some other issue raise it's head then it would need to be worked in as well.