[empath75]

I'm going to paraphrase Matt Levine here -- the central trick of bankers is to divide debt into tranches of claims of different seniority, with different rates of return. Debt is a way to borrow money from investors where they actually have a generally low rate of return specified and have a senior claim on being paid back in the case of insolvency. Stocks are a way to borrow money for investors where they get basically _nothing_ in the case of insolvency, but they expect a higher return from either dividends or stock buy backs, or just from company growth. Different investors have different goals in terms of risk/reward for what they want out of a company they invest in, and providing investors more options unlocks more opportunities to raise money.