By Kevin Rutter, CEO of AIQ Markets.
While the recent geopolitical shock has temporarily slowed issuance in U.S. corporate bonds, a notable market shift was already underway. Companies have been increasingly opportunistically, accelerating debt issuance when windows open, rather than waiting for ideal conditions – and this is raising new challenges for market participants in how they price risk, assess value, and execute trades.
In practice, this shift means borrowers are front-loading funding, compressing timelines and making “go or no-go” decisions with far less visibility than in the past. The impact is that markets are moving faster and, more importantly, access to credit has become less dependable.
The change is most visible in primary markets, but its effects are also increasingly felt by market participants in secondary trading conditions, where the consequences are more complex and longer-lasting.
When issuance is clustered into short bursts, the market is forced to absorb large volumes of new supply all at once, followed by periods of relative inactivity. This creates a “feast or famine” dynamic in liquidity. Newly issued bonds – the so-called on-the-run securities – tend to see intense trading activity immediately after issuance. Over time, as attention shifts, those same bonds become off-the-run and trade less frequently.This is an age-old pattern in corporate bonds, but its intensity is getting dialed up exponentially. As issuance becomes more opportunistic and less evenly distributed, these cycles of liquidity become more pronounced. Periods of heavy activity are followed by sharper drop-offs, making it harder for market participants to maintain a consistent view of pricing and liquidity across portfolios.
This unevenness is emerging even as overall activity reaches new highs. According to Coalition Greenwich, U.S. corporate bond trading averaged more than $50 billion per day in 2025, with single-day volumes approaching $85 billion – both record levels.[1] At first glance, that suggests a deep and highly liquid market. In practice, activity is increasingly concentrated into short periods of intensity, rather than distributed evenly over time.
The result is a secondary market that is more uneven. Pricing dispersion between similar bonds can widen, not necessarily because fundamentals differ, but because liquidity does. The market consistently gravitates toward what is new and actively traded, leaving comparable bonds less liquid and harder to price with confidence. When issuance arrives in bursts, liquidity is spread even more unevenly, making execution increasingly dependent on timing.
For investors and banks, this complicates decision-making, because assessing relative value requires navigating a market where signals are less stable and less evenly distributed. Portfolio construction must account for the reality that not all bonds are equally tradeable at all times, even within the same issuer or rating category.
These dynamics are being reinforced by broader macro trends. A significant portion of corporate borrowers will need to refinance debt in the coming years at higher interest rates than those secured during the low-rate environment of the previous decade. That alone is likely to increase issuance volumes and raise the stakes around timing. Companies may be more inclined to secure funding when conditions allow, even if pricing is not ideal, rather than risk being shut out of the market later.
At the same time, investment tied to artificial intelligence – particularly the build-out of data centers and supporting infrastructure – is driving a new wave of capital demand. The scale of expected spending is substantial, and much of it will be financed through credit markets.
Together, these forces point to a future where issuance is both larger and more episodic, with more supply arriving in less predictable patterns.
To outsiders, financial markets are often thought of as liquid, continuous systems where participants can transact as needed. In practice, however, credit markets function more like networks that operate in bursts where liquidity concentrates around issuance, then dissipates. Pricing is clearest when activity is highest, and more ambiguous in between.
The shift towards opportunistic, window-driven issuance reinforces the idea that market access is not a given, and that liquidity is not evenly distributed through time. For forward-thinking market participants, the challenge is adapting to this reality in order to gain and retain a competitive edge. This requires thinking not just about what to trade, but when, and not just about price, but about the conditions under which that price is executable.
For policymakers and regulators, it raises a broader question about market resilience. A system that functions well in bursts may still be vulnerable in the gaps between them. Understanding how markets behave between moments of peak activity may be just as important as how they perform during them, especially when access to capital becomes less predictable.
Ultimately, corporate bond markets remain central to the financing of the real economy, but as issuance patterns evolve and liquidity becomes more episodic, the nature of the way capital flows through them is changing. To remain profitable, market participants must now learn to navigate and adapt to this new reality.
[1] https://www.greenwich.com/market-structure-technology/us-corporate-bond-trading-2025-numbers
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