A lot in the market has changed since the crash of 2008. And there’s little question that for a lot of investors it’s harder to make money. But there is at least one situation these days where they have a legitimate chance to turn a profit “almost instantaneously,” Cramer said Tuesday. Through secondary offerings.

But before investors learn how to how to trade these offerings, they need to know why they’ve become such great opportunities. That has to do with the enormous amount of debt that so many companies have been carrying.