Another take on the market rally -- one that has real support

The unexpected market rally has spurred a flurry of commentary by financial pundits. Some believe it is a "bear market rally." Others tell us that the Dow is poised to hit 15,000 or higher.

How do investors know who's right? It's actually quite simple. No one knows.

Wall Street insiders don't know. Economists don't know. Financial pundits don't know. Market-timing newsletters don't know. Brokers and advisors certainly don't know!