Commercial paper and short-term funding

What commercial paper actually is

Not every financing need calls for a long-term bond. Investment-grade companies also have short-term, recurring funding needs, bridging the timing gap between paying suppliers and employees and collecting from customers, funding seasonal working capital swings, or covering a short-term gap before a longer-term financing closes, and the long-term bond market is a relatively expensive and slow way to solve a problem that is, by nature, temporary. Commercial paper exists to solve exactly this problem: it is a short-term, unsecured promissory note, typically maturing in anywhere from a few days up to nine months, though most commercial paper in practice matures much sooner than that, often within a few weeks, sold directly to institutional investors.

Commercial paper is a discount instrument: rather than paying a stated coupon like a typical bond, it is sold at a price below its face value, and the investor's return comes from the difference between the discounted purchase price and the full face value received at maturity. This structure suits its short maturity well, since a formal periodic coupon payment schedule would add unnecessary complexity to an instrument meant to be simple, fast, and cheap to issue repeatedly.

A hypothetical helps make the use case concrete. Imagine a large retailer that needs to pay suppliers well before it collects cash from a season's worth of sales; rather than drawing down its cash reserves or waiting to time a long-term bond issuance around a purely temporary, recurring gap, it can issue commercial paper to bridge that gap, then let the notes mature and roll into new paper as needed until the seasonal cash collection cycle catches up. The instrument is built for exactly this kind of short, recurring, predictable funding need, not for financing a long-term, permanent addition to the balance sheet.

Who can actually issue it

Commercial paper is generally the province of large, highly rated, frequent issuers, and for a structural reason: because it is unsecured and typically issued without the extensive documentation of a full bond offering, investors are relying almost entirely on the strength of the issuer's credit and its ability to repay on a very short timeline, which means only issuers with strong, well-established credit can access the market on attractive terms. A company with a marginal or deteriorating credit profile would generally find the commercial paper market unwilling to lend to it, or willing only at a cost that makes the instrument unattractive relative to other options, which is part of why commercial paper is heavily associated with the highest tier of investment-grade issuers rather than being a universally available financing tool.

Because commercial paper matures so quickly and gets reissued constantly to keep a rolling amount outstanding, an issuer typically maintains a commercial paper program rather than thinking of each individual note as a standalone financing decision. A program sets a maximum amount the issuer can have outstanding at any time, and the issuer's treasury team, often working with DCM bankers acting as dealers for the program, issues new notes on an ongoing basis, often daily, to replace maturing ones and adjust the total amount outstanding to match the company's current short-term funding needs.

How commercial paper actually gets sold

Commercial paper is typically sold through dealers, banks acting as intermediaries between the issuer and the investor base, rather than through the full underwriting and syndication process used for a long-term bond. Because the instrument is short-dated and the issuer is, by definition, a strong, well-known credit, the sales process is much lighter than the marketing and book-building sequence covered in how a syndicate desk prices a new bond issue: there is generally no multi-day roadshow, no formal price talk that tightens over hours, and no allocation negotiation of the kind a large bond deal requires. Dealers simply place the paper with investors, typically money market funds and other institutions seeking a safe, liquid, short-term place to hold cash, at a rate reflecting the issuer's credit quality and current short-term market conditions.

The typical buyer of commercial paper looks different from the typical buyer of a long-term bond. Money market funds in particular are a dominant source of demand, since they need short-dated, high-quality instruments to meet their own regulatory requirements around liquidity and credit quality, and commercial paper from a strong investment-grade issuer fits that need well.

Backup liquidity: the requirement behind the instrument

Because commercial paper is so short-dated, an issuer relying on it faces a structural risk: at maturity, the issuer generally does not have the cash on hand to simply repay the note in full from its own operations, and instead plans to "roll" the maturing paper by issuing new commercial paper to replace it. This works fine in a normal, functioning market, but it creates real exposure if the commercial paper market becomes unwilling or unable to absorb new issuance at the moment an issuer's existing paper matures, a genuine risk that materialized broadly across the commercial paper market during the 2008 financial crisis, when many issuers found the market for new paper had seized up almost overnight.

For this reason, issuers, and the rating agencies evaluating them, treat backup liquidity as a near-mandatory feature of any serious commercial paper program: a committed bank credit facility, typically undrawn under normal circumstances, sized to cover the maximum amount of commercial paper the issuer might have outstanding at any time. This backup facility exists specifically so that if the commercial paper market were ever unwilling to roll an issuer's maturing notes, the issuer could draw on the committed facility instead to repay maturing paper, avoiding a default purely because of a temporary market disruption rather than any actual deterioration in the issuer's own creditworthiness. An issuer typically pays a commitment fee on the undrawn facility to keep it available, an ongoing cost of running the program that a candidate should be able to mention when asked why commercial paper is not simply free short-term money. Rating agencies scrutinize the adequacy of this backup liquidity closely as part of evaluating an issuer's overall credit, described more broadly in ratings and the issuer.

How commercial paper is actually priced

Commercial paper is quoted as a discount rate or an equivalent yield, and like a longer-dated bond, that rate can be thought of as a short-term benchmark, commonly a reference rate such as SOFR, plus a spread reflecting the specific issuer's credit quality. Purely for illustration: if a hypothetical issuer's 30-day commercial paper prices at a spread of 15 basis points over the relevant short-term benchmark, an investor buying that note is accepting a slightly higher return than the benchmark alone would offer, compensating for the modest incremental credit risk of holding a specific corporate issuer's short-term paper instead of a risk-free instrument of similar maturity. The same underlying logic from how bond pricing works for bankers, isolating issuer-specific credit risk from the broader level of rates, applies here too, just compressed into a much shorter time horizon and a much narrower range of spread outcomes, since the strongest, most frequent commercial paper issuers tend to trade within a fairly tight band of each other.

Because commercial paper investors, money market funds especially, are extremely sensitive to credit quality and generally unwilling to take on meaningful default risk in exchange for a small amount of incremental yield, the rating agencies maintain a separate short-term rating scale specifically for instruments like commercial paper, distinct from the long-term letter-grade scale used for bonds. Only issuers in the highest tier or two of that short-term scale can typically access the commercial paper market on attractive terms at all, which reinforces why the market is effectively reserved for the strongest, most creditworthy corporate borrowers rather than being broadly available.

How commercial paper fits alongside long-term issuance

Commercial paper and long-term bonds are not competing tools; they solve different problems on the same balance sheet, and a well-run treasury function uses both deliberately. Short-term, recurring, working-capital-driven needs are well suited to commercial paper, since it is cheaper and faster to issue than a bond and naturally matches the short-term nature of the underlying need. Long-term needs, funding an acquisition or refinancing a bond years from maturing, are properly funded with long-term debt, described in the investment-grade issuance process, because funding a genuinely long-term need with a rolling short-term instrument would leave the company perpetually exposed to a sudden inability to roll its paper.

A common mistake in how candidates describe this relationship is treating commercial paper as simply a cheaper substitute for long-term debt across the board. It is not; using short-term commercial paper to fund what is really a long-term, permanent financing need is a mismatch that rating agencies and sophisticated investors specifically watch for, since it leaves the issuer's ongoing funding structurally dependent on a market that can, in stressed conditions, become unavailable exactly when the issuer needs it most.

Practice question

Why does an issuer with a strong credit rating still need a backup bank credit facility if it's already issuing commercial paper?

Commercial paper is short-dated by design, and an issuer relying on it typically doesn't hold enough cash to repay maturing paper outright; the plan is to roll it, issuing new commercial paper to replace what's maturing. That works fine in a normal market, but it creates real exposure if the commercial paper market temporarily becomes unwilling to absorb new issuance right when an issuer's existing paper comes due, something that actually happened broadly across the market during the 2008 financial crisis. A committed backup credit facility, usually undrawn under normal conditions, exists specifically to cover that scenario: if the commercial paper market seizes up, the issuer can draw on the facility to repay maturing notes instead of defaulting purely because of a temporary market disruption rather than any real deterioration in its own credit. Rating agencies treat the adequacy of that backup facility as a real part of evaluating a commercial paper program, not just a formality, because a program without sufficient backup liquidity is meaningfully riskier than one with it, even if the issuer's underlying credit looks identical on paper.

What the interviewer is listening for: Whether you understand rollover risk as the core structural vulnerability of short-term funding, and whether you can explain why backup liquidity specifically addresses that risk rather than just naming it as a generic best practice.