Oil prices have been plummeting for months now, and guess what—they keep on plummeting! It's time to ask: how low can they go?

Today the price of a barrel oil fell below $45, its lowest point in more than five years. One Saudi prince says the world will "never" see $100-per-barrel oil again; in fact, abundant supply and faltering demand leads most analysts to think prices could fall even lower soon.

But how low?

$40?

$35?

$30?

$25?

$20?

Nobody knows. Wait and see.

You can read the Wall Street Journal and the Financial Times and every other sophisticated business publication but you're not gonna find a better prediction than this. Sorry.

[Photo: AP]