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Dear Alex,
1. How's about Sydney?
2. Is it above its average long term growth rate already?
I would say sydney is still (cumulatively) above its long term growth rate. I also think this based on the low rental yield since I believe that long term property values track fundamentals which is reflected in yields. Yields in your 'battler' suburbs are barely in the 4% range.
In short, I still think Sydney will fall. I would say Melbourne and Brisbane are better buys. Don't have much research on Adelaide.
Alex