Treasury Market Liquidity Faces Risks Amid Yield Volatility, Inflation

Treasury Market Liquidity Faces Risks Amid Yield Volatility, Inflation 

Liquidity in the Treasury market is poised to worsen due to a combination of self-reinforcing factors. As the U.S. election nears, yield volatility is expected to rise, exacerbating liquidity pressures on already constrained dealer balance sheets. Further down the line, inflation risks re-emerging alongside the growing supply of government debt will only heighten liquidity challenges.

Liquidity is crucial for the smooth functioning of markets, as it ensures that asset pricing reflects fundamentals rather than market participants' ability or willingness to trade. Nowhere is this more important than in the U.S. Treasury market, where Treasury yields serve as a key benchmark for global financial markets. When bond-market liquidity declines and yields rise, it's a signal to pay attention.

The most critical factor affecting Treasury liquidity is yield volatility. The MOVE index, a key measure of implied yield volatility, has surged recently as we approach the election. This rise in the MOVE index has a strong correlation with worsening Treasury market liquidity, as shown by the Bloomberg Treasury Liquidity Index. The growing volatility in yields is raising concerns about liquidity risks.

These concerns about Treasury liquidity have been brewing since the pandemic. In March 2020, the Federal Reserve had to take drastic measures to stabilize a Treasury market that had become severely impaired. While certain liquidity indicators have since improved, such as increased order-book depth, they remain far below pre-pandemic levels. Even Bloomberg's liquidity index shows that market conditions have yet to return to normal, with liquidity still far from where it was in 2019.

This leaves the Treasury market vulnerable to current conditions: rising event risks, leading to increased volatility. The situation is compounded by another problem: increasingly constrained dealer balance sheets. A recent New York Federal Reserve study highlighted that yield volatility is the primary driver of Treasury liquidity, but when dealer balance sheets are constrained, it plays a more dominant role in liquidity deterioration.

Today, the inventory of Treasuries on dealer balance sheets is near historic highs in relation to the total debt outstanding, putting additional strain on market liquidity. Primary dealers play a critical role in the Treasury market by facilitating trades, but their ability to do so is now being hampered by the inverted yield curve. When the curve inverts, carry traders, who are typically the marginal buyers of Treasuries, retreat from the market, leaving dealers with excess inventory that they must finance through repo markets.

Adding to these liquidity challenges is the re-emergence of inflation risks and the ongoing fiscal deficit. While inflation moderated in recent months, the underlying drivers — particularly elevated profit margins — suggest that inflation could resurge. This would further destabilize Treasury market liquidity, as inflation volatility tends to coincide with deteriorating liquidity.

Additionally, the U.S. government's growing fiscal deficit means more long-duration debt issuance, which further strains dealer balance sheets. As these dynamics intensify, they risk creating a feedback loop where rising yields, balance sheet constraints, inflation, and government issuance all reinforce each other, worsening liquidity and threatening broader market stability.