Chinese new home prices were down 4.3% in December, according to Reuters calculations. That’s significantly worse than the 3.7% decline in November.

The global economy is in a tough spot at the moment and investors know it. If China worries flare up that could be the tipping point in risk trades.

At the moment, however, you have to imagine the investors who have driven the surge in Chinese stocks have a good idea what’s going on at ground level.