Commercial Paper

Commercial paper is a short-term IOU that a large company issues to raise cash quickly, instead of borrowing from a bank. The company promises to pay back a fixed amount on a set date, usually within a few weeks to a few months, and no collateral backs the promise — it relies purely on the issuer's creditworthiness.

It works like a zero-coupon bond: an investor buys the paper for less than its face value and receives the full face value at maturity. The difference between the purchase price and the payoff is the investor's return, functioning like interest even though no interest payment is ever made along the way. Companies use commercial paper to cover near-term needs such as payroll, inventory, or bridging gaps between receivables, because it's typically cheaper and faster to issue than arranging a bank loan.

The nuance beginners miss is that commercial paper is unsecured and generally only available to large, financially strong companies, because buyers won't accept the credit risk otherwise. It also normally isn't registered with securities regulators the way a public bond offering is, and that exemption is usually tied to the paper's maturity staying under a specific short-term threshold — the exact cutoff is a regulatory detail, not something to assume from memory. If a company's credit quality deteriorates, its commercial paper market can seize up fast, which is why disruptions in this market are watched as an early warning sign of broader credit stress.

Retail day traders almost never trade commercial paper directly — it's a wholesale, institutional market — but it underpins some money market funds and short-term cash products that traders park uninvested capital in.