I'm re-replying to this because I left out a more important aspect of the disconnect between stocks and the status of the real economy. One that has nothing to do with the other issues of fraud and manipulation.
Stocks prices, even when honestly determined, are based on stockholder valuations of the company's immediate status, not the real state of the economy.
Example: XYZ Corp lays off 100,000 people, even though they are profitable. As a result their profit/loss statements look better and they are rewarded with a higher share price by "investors".
But what has XYZ Corp actually done? They've destroyed the ability to consume for 100,000 individuals and/or families. Those lost jobs result in lost business for every business that serviced those 100,000 individuals/families, forcing them in turn to lay people off. Rinse, repeat over and over.
That's NOT good for the real economy, the economy that distributes needed resources to allow people to live. Laying off workers, even if needed (and many layoffs are NOT needed, but rather designed to "increase profits"), is always a bad economic indicator.
Before the Marketeers start harping about the inevitability of layoffs and "creative destructions" and all that theoretical stuff, I know that a certain amount of "churn" is expected and unavoidable. That doesn't make it good, nor does it mean we need more of it.
Producers need people with incomes to consume their produce. That's one of the reasons why the US is so frakked right now. We've eliminated the ability of too many consumers to consume and we wonder why producers have no business coming in.