Commercial paper is an unsecured, short-term promissory note that large, highly rated corporations sell to raise cash for day-to-day operations. A company promises to pay a fixed face value on a set date, usually within one to three months, and sells the note today at a discount to that face value. The gap between what the buyer pays and what the buyer collects at maturity is the return. As of early 2026, roughly $1.3 trillion in commercial paper was outstanding, making it one of the largest segments of the U.S. money market.1Board of Governors of the Federal Reserve System. Commercial Paper Rates and Outstanding Summary
How the Discount Works
Commercial paper does not pay periodic interest the way a bond does. It is sold below face value and redeemed at face value. If a company issues a $1 million note for $995,000 with a 30-day maturity, the buyer hands over $995,000 today and receives $1 million in 30 days. The $5,000 difference is the investor’s return, which translates into an annualized yield.
That yield sits below what the same company would pay to draw on a bank line of credit, and that is the whole appeal for the borrower. In late March 2026, top-rated 30-day nonfinancial commercial paper carried an annualized rate near 3.71%.2Board of Governors of the Federal Reserve System. Commercial Paper Rates and Outstanding Summary The exact rate any given issue commands depends on the issuer’s credit quality, the maturity length, and prevailing short-term rates set by the Federal Reserve.
The proceeds have to fund current operations: carrying inventory, bridging the gap between billing and collection, covering payroll. They cannot go toward long-term assets like equipment or real estate. That restriction is not a market convention. It is written into the federal exemption that lets commercial paper skip SEC registration.
Core Features
Unsecured
No collateral backs a commercial paper note. There is no pledged asset pool, no lien, no security interest. The investor is relying entirely on the issuing company’s ability to pay when the note comes due. That makes the issuer’s credit rating the single most important variable in whether the paper sells and at what discount.
Short Maturities
The federal statute that exempts commercial paper from SEC registration caps maturity at nine months.3Office of the Law Revision Counsel. 15 USC 77c – Classes of Securities Under This Subchapter Market convention reads that as 270 days, the figure the Federal Reserve itself uses.4Board of Governors of the Federal Reserve System. Commercial Paper Rates and Outstanding Summary Most notes mature well before that. Average maturity runs about 30 days, and plenty of issues mature in one to seven days. A company that needs ongoing funding simply issues new paper when the old paper comes due, a process called rolling over.
Large Denominations
Minimum face value is typically $100,000, with most trades happening in multiples of $1 million.5Federal Reserve Bank of Richmond. Chapter 9 – Commercial Paper Those size thresholds effectively lock individual retail investors out of the direct market. The practical route for individuals is a money market mutual fund, which pools capital and buys commercial paper alongside Treasury bills and other short-term instruments.
Almost No Secondary Trading
Unlike stocks or bonds, commercial paper has virtually no active secondary market. Investors buy and hold to maturity, which is rarely more than a few weeks away. Selling before maturity is difficult. The short duration makes this a manageable feature rather than a defect, because most institutional buyers match their commercial paper holdings to known upcoming cash needs.
Who Issues It and Who Buys It
Only financially strong companies can realistically use the commercial paper market. Issuers are typically major banks, large industrial corporations, finance companies, and utilities. The market expects a top-tier short-term rating, generally P-1 from Moody’s or A-1 from Standard & Poor’s, before it will offer competitive discount rates. Paper carrying weaker ratings finds little institutional demand.
The buyer side is almost entirely institutional: money market mutual funds, insurance companies, pension funds, bank trust departments, and large corporations investing their own cash reserves. Money market funds are the largest single buyer group. Under SEC Rule 2a-7, those funds can only hold securities that present minimal credit risk and have remaining maturities of 397 days or less, with the portfolio’s weighted average maturity capped at 60 days.6eCFR. 17 CFR 270.2a-7 – Money Market Funds Commercial paper fits neatly inside those constraints, which is why money market funds absorb so much of it.
The two sides depend on each other. Money market funds need commercial paper to earn yield above Treasuries. Corporations need money market fund demand to keep borrowing cheap. When that relationship strains, as it did in 2008 and again in 2020, the disruption travels quickly through the wider financial system.
How It Reaches Investors
Commercial paper gets to buyers through one of two channels. In a direct placement, the issuer sells notes straight to investors with no middleman. This makes sense for financial companies that issue paper daily, such as auto finance arms and bank holding companies, where the volume justifies running an in-house sales operation.
The alternative is placing paper through a dealer, usually a major securities firm that buys from the issuer and resells to investors for a small commission. That route works better for nonfinancial companies or occasional issuers that lack the infrastructure to maintain relationships with dozens of institutional buyers.
Before any issuer enters the market, it needs a short-term rating from at least one major credit agency. That rating drives the discount buyers will accept. A downgrade can be brutal: if the rating slips, investors may refuse to buy new paper, leaving the company unable to roll over its maturing obligations. To guard against that, virtually every issuer maintains a standby line of credit with one or more banks, sized to cover its outstanding paper. If the company cannot issue new paper for any reason, it draws on the credit line to repay maturing notes. Rating agencies effectively require this backup before assigning top-tier ratings, so the line of credit and the rating reinforce each other.
Asset-Backed Commercial Paper
Not all commercial paper is unsecured. Asset-backed commercial paper, or ABCP, is issued by special-purpose entities that hold pools of financial assets like trade receivables, auto loans, or credit card balances as collateral. A sponsoring bank sets up the entity, transfers or purchases the receivables into it, and the entity issues short-term paper backed by the cash flows from those assets.
ABCP took shape in the 1980s as a way for banks to help corporate clients borrow directly from investors while using receivables as collateral, keeping the exposure off the bank’s own balance sheet. The structure layers in credit enhancement: if some underlying receivables default, reserve accounts and overcollateralization absorb the losses before investors take a hit.
The risk profile differs from traditional commercial paper. Beyond credit risk, ABCP carries liquidity risk when the timing of cash from the underlying assets does not line up with when the notes come due. The sponsor’s own financial strength matters because the sponsor typically provides the liquidity backstop. The 2007-2008 period showed what happens when those backstops prove thin.
The Regulatory Exemption
Commercial paper only works because it sidesteps SEC registration. Registering a security is expensive and slow, which would defeat the point of a funding tool measured in days. Section 3(a)(3) of the Securities Act of 1933 provides the exemption. A note qualifies if two conditions hold: the maturity cannot exceed nine months, and the proceeds must fund current transactions.3Office of the Law Revision Counsel. 15 USC 77c – Classes of Securities Under This Subchapter “Current transactions” means working capital: payroll, inventory, receivables. Using the proceeds to buy a factory or fund an acquisition would break the exemption and force full registration.
The statute also limits the exemption to notes “not ordinarily purchased by the general public,” which is why minimum denominations stay so high and the buyer pool remains almost entirely institutional.5Federal Reserve Bank of Richmond. Chapter 9 – Commercial Paper
The SEC monitors the market for fraud and compliance with the exemption but does not approve individual issues the way it reviews registered offerings. The Federal Reserve has more day-to-day influence through short-term interest rates. When the Fed moves the federal funds rate, commercial paper rates move with it, directly affecting what issuers pay and what investors earn.
The Main Risks
Rollover Risk
Rollover risk is the market’s central vulnerability. Because maturities are so short, issuers depend on selling new paper to repay maturing notes. In calm conditions this is routine. If investors lose confidence in an issuer or in the market broadly, new paper cannot be sold, and the issuer faces an immediate cash shortfall. Penn Central’s 1970 default and Enron’s 2001 collapse each triggered pullbacks that reached beyond the failing company, showing how quickly confidence problems spread.
Broader Market Freezes
The most severe disruption hit asset-backed commercial paper in 2007. As concerns about mortgage-related assets built, investors refused to roll over ABCP, and outstanding balances dropped by roughly $350 billion, close to 30% of the market, by year-end.7Board of Governors of the Federal Reserve System. Panic in the Asset-Backed Commercial Paper Market Sponsoring banks were forced to take assets back onto their balance sheets, and the strain contributed to the broader freeze in interbank lending.
The market seized again in March 2020 as COVID-19 triggered a flight to the safest assets. The Federal Reserve reactivated the Commercial Paper Funding Facility, first created in 2008, buying eligible three-month unsecured and asset-backed paper directly from issuers until the facility’s authorization expired on schedule in March 2021.8Federal Reserve Bank of New York. Commercial Paper Funding Facility Two interventions in roughly a decade point to a structural feature of the market: it runs smoothly in normal conditions and is fragile when confidence breaks.
Default
Outright defaults are uncommon. High ratings, backup credit lines, and short maturities keep losses rare. But when a default does happen, there is no collateral to recover, and investors get whatever the bankruptcy process eventually delivers. The bigger practical danger for most people is indirect: a money market fund holding paper from a defaulting issuer can “break the buck,” meaning its net asset value drops below $1.00 per share. That happened in September 2008 when the Reserve Primary Fund’s shares fell to $0.97 after Lehman Brothers failed, setting off a run on money market funds across the industry. SEC reforms since then, including tighter credit quality standards under Rule 2a-7, have reduced but not eliminated that risk.6eCFR. 17 CFR 270.2a-7 – Money Market Funds
How It Compares With Other Short-Term Instruments
Commercial paper sits in a specific spot in the money market. Treasury bills are safer, carrying the full faith and credit of the U.S. government, and they yield less. Certificates of deposit carry FDIC insurance up to applicable limits but are less liquid for large institutional sums. Repurchase agreements are collateralized and can settle overnight but involve more mechanical complexity. Commercial paper offers higher yield than Treasuries and a simpler structure than repos, at the cost of credit risk the other instruments largely avoid.
For issuers, the comparison runs against bank lines of credit. Drawing on a revolving facility costs more in interest and often comes with restrictive covenants. Commercial paper lets a strong borrower reach a deep pool of institutional capital at rates close to the federal funds rate, with no covenants beyond repayment at maturity. The catch is that bank credit lines stay reliable in a crisis while access to the commercial paper market can vanish overnight, which is why most issuers keep both.