There is no shortage of punditry on how this real-estate bubble will end. Every week it seems more data pours in supporting both a hard and soft landing. Here are four ETF indicators that represent the current confusion...
Homebuilder ETFs showing definite weakness:
ITB: iShares Dow Jones US Home Construction
XHB: SPDR Homebuilders
Broader real-estate index ETFs showing sideways movement with some upside strength:
IYR: iShares Dow Jones U.S. Real Estate Index Fund
ICF: iShares Cohen & Steers Realty Majors Index Fund
Any contributions regarding other indicators, or the weaknesses of these indicators is welcome.
In the patrick thread that you mentioned that you used a neural net to signal short opportunities? What are you using as your inputs and your training data for the NN?
Posted by: TN | Wednesday, July 26, 2006 at 15:59
I use quite a few, depending upon what I'm trying to predict. To generalize, I start with some standard stuff like:
* correlations to indices (with usually a lag of 4 for a daily model)
* open & close ratios to other stocks if it's a pair-wise fit
* momentum stuff like standard MACD, but usually some variable oscillations based upon my fundamentals analyses
* simple historical volatility stuff
* usually a few XY r-squared correlations with lag to rotational sector indices or sometimes just based upon my sentiment about macroeconomic direction
I usually try to predict simple direction first with a 75% or greater accuracy. Then I try to predict some correlative changes; usually simple correl and rsq. Finally, I use those NNs as inputs into specific prediction models.
I usually use a committee of NNs so I can account for both feed-forward and time-delay style topologies, since different types can become better depending upon how quickly the underlying data changes.
Posted by: randolfe | Wednesday, July 26, 2006 at 16:24