The stock market is being artificially propped up using perpetual quantitative easing (fake money)
how can you tell?
Just a guess, but every time they threaten to stop, the market tanks. We won't really know until they really do cut it off.
Also, there is a weird kind of reverse logic going on with the traders. When bad economic news comes out, normally the market would go down, but the reverse is happening. Bad jobs report means QE will continue, so the market goes up. Good news on housing, the market goes down. The Fed is controlling the markets. JMHO