Authors

Patrick Carletto - Co-Head of Money Market, Amundi
Head of Money Market Investment Strategy, Amundi
 Jingjing Wang, Gérante de fonds monétaires, Amundi
Money Market Portfolio Manager, Amundi

U.S. commercial paper market: ABCP leads the expansion amid tighter funding conditions

The U.S. commercial paper market has continued to expand in 2026, led by ABCP, which has gained share within the market while issuance has shifted further toward the very short end of the curve.

Against a backdrop of higher rates and tighter funding conditions, ABCP has remained an important funding channel for dealers, while also showing greater sensitivity during periods of market stress.

This bulletin reviews the latest trends in market size, issuer composition, tenor mix and spread dynamics.

U.S. commercial paper market extends its growth

The U.S. commercial paper market has shown an upward trajectory since the beginning of the year, with outstanding volumes rising to $1,466bn from $1,365bn at the start of the year. Breaking this down by issuer type, financial issuers account for 43% of total outstanding, down 4 percentage points since the start of the year. By contrast, the share of ABCP has increased from 31% to 34%, while corporate issuance has edged up modestly.

Table summarizing issuer type outstanding: Financial, ABCP and Non Financial, plus Total. It shows  624 b n f i n a n c i a l s , 624bnfinancials,502bn ABCP and  340 b n n o n f i n a n c i a l , f o r 340bnnonfinancial,for1,466bn total, with weights of 43%, 34% and 23% and year-to-date changes.

Source: Federal Reserve as of 23/09/2026

ABCP remains the main driver of growth

Within this broader trend, ABCP has been the standout segment. Outstanding ABCP has climbed to nearly $502bn, representing a 17% increase year-to-date. This compares with Europe, where ABCP has also remained on an upward path, but at a more moderate pace.

Looking ahead, we expect ABCP outstandings to remain elevated, particularly as dealers continue to seek alternative sources of financing for both fixed income and equity collateral, supported by off-balance-sheet solutions and funding optimization.
 

	Stacked bar chart of historical commercial paper market outstandings, in $bn, from Sep 2024 to Sep 2026. Financial CP is the largest segment, followed by asset-backed and non-financial paper, with total market outstandings trending higher over the period.

Source: Federal Reserve as of 23/09/2026

Line chart of ABCP outstanding in the US and EU, in €bn, from Oct 2025 to Sep 2026. US ABCP rises steadily from about 340 to nearly 500, while EUR ABCP stays much lower and broadly stable around 70 to 90, showing a widening gap.

                                                                                      Source: CMD Portal as of 01/09/2026

A clear spread hierarchy across issuer types

From a spread perspective, a clear hierarchy emerges across maturities. The corporate issuer rated A2/P2 offers the highest compensation. Among the AA-rated issuers, ABCP provides the highest spread, followed by non-financial issuers, while financial issuers offer the lowest spread within this group.

Scatter plot of spread-to-SOFR for 1W tenor from Jan to Sep 2026, comparing A2P2 NonFinancial, AA ABCP, AA NonFinancial and AA Financial. A2P2 sits highest throughout, while AA financial and nonfinancial spreads remain close to zero.

Source: Federal Reserve, Bloomberg as of 23/09/2026

Scatter plot showing spread-to-SOFR for 1M tenor across Jan to Sep 2026, with A2P2 NonFinancial, AA ABCP, AA NonFinancial and AA Financial series. A2P2 is consistently the widest spread, while the AA segments stay materially lower.

Source: Federal Reserve, Bloomberg as of 23/09/2026

Scatter plot of spread-to-SOFR for 2M tenor from Jan to Sep 2026, comparing A2P2 NonFinancial, AA ABCP, AA NonFinancial and AA Financial. A2P2 spreads rise to the highest levels, while AA ABCP and AA financial remain moderate and AA nonfinancial near zero.

Source: Federal Reserve, Bloomberg as of 23/09/2026

Scatter plot of spread-to-SOFR for 3M tenor from Jan to Sep 2026, with A2P2 NonFinancial, AA ABCP, AA NonFinancial and AA Financial. A2P2 remains the widest spread across the period, while AA ABCP and AA Financial track lower and more stable levels.

Source: Federal Reserve, Bloomberg as of 23/09/2026

Issuance continues to concentrate at the very short end

In terms of maturity, the U.S. commercial paper market remains large and highly liquid, with issuance concentrated at the very short end of the curve. In the context of the Fed’s rate-hiking cycle and the steepening yield curve shown in the graph below (Evolution of SOFR OIS rate), CP tenors have shortened further, reflecting both issuers’ preference for funding flexibility and investors’ appetite for shorter-dated paper in a higher-rate environment. As a result, the share of issuance with maturities of less than 9 days increased to 82% in September 2026, compared with 76% at the end of February 2026.

Stacked bar chart of average weekly total issued value by maturity bucket, in $bn, from Sep 2024 to Sep 2026. The shortest maturities dominate issuance, led by 1–4 days, with smaller contributions from longer tenors up to more than 80 days.

Source: Federal Reserve as of 23/09/2026

Visuel 2

Source: Bloomberg as of 30/09/2026 

ABCP offers a premium, but remains more vulnerable in stress

Looking more closely at ABCP, they typically offer slightly higher yields than conventional commercial paper issued by banks or non-financial corporates with the same rating. This premium reflects its greater structural complexity, indirect credit exposure, and higher liquidity risk. As a result, ABCP tends to be more vulnerable during periods of market stress.

This pattern is consistent with the charts below, which show that ABCP spreads generally remain above those of bank and non-financial commercial paper and react more sharply during stressed market episodes. In particular, the widening was especially pronounced in February, at the height of the crisis period.

Scatter plot of 1M AA USCP to SOFR from Feb to Sep 2026, split into Asset Backed, Non Financial and Financials, with a red vertical marker in early March. Asset-backed spreads stay highest, non-financials moderate, and financials mostly near zero.

Source: Federal Reserve as of 25/09/2026

Scatter plot of 3M AA USCP to SOFR from Feb to Sep 2026, with Asset Backed, Non Financial and Financials series and a red vertical marker in early March. Asset-backed paper shows the highest spreads, while non-financial and financial names remain lower and more dispersed.

Source: Bloomberg, Federal Reserve as of 25/09/2026

ABCP spreads widen as equity financing costs rise

In addition to the widening observed during the crisis period, another episode of widening, beginning in June, appears to have coincided with a rise in the cost of financing leveraged equity positions. In this context, the cost of equity financing refers to the expense of borrowing against equity collateral to maintain leveraged long positions. This interpretation is consistent with the funding cost implied by AXW futures on the S&P 500 total return index, which reached a record high in June before easing later in the period. As financing costs increased, leveraged investors faced higher funding expenses relative to benchmark rates, making it more costly to sustain long exposure to U.S. equities.

In response, dealers may have relied more heavily on the ABCP market as an alternative source of short-term funding against equity collateral. As conditions in equity financing deteriorated, ABCP may have become a comparatively more attractive funding channel. The resulting increase in demand for ABCP funding, combined with broader market-wide funding pressure, may therefore help explain the renewed widening in ABCP spreads observed in June.

Dual-axis line chart showing ABCP_3M and AXW1 Futures from Feb to Sep 2026. ABCP 3M fluctuates around 10 to 25, while AXW1 Futures moves from roughly 40 to above 120 before easing back, highlighting the link between funding costs and equity financing conditions.

Source: Bloomberg, Federal Reserve as of 25/09/2026

ABCP remains central to market growth and funding sensitivity

In conclusion, the U.S. commercial paper market has expanded steadily this year, led by ABCP, which now represents a larger share of total outstanding. 

At the same time, issuance has shifted further toward very short maturities, reflecting tighter funding conditions and stronger demand for flexibility. 

On the spread side, ABCP consistently trades at a premium, and its widening during periods of stress, especially in February and again in June, suggests that it remains particularly sensitive to funding pressure, especially when dealers turn to it as an alternative source of financing.

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