Debt Ceiling May Affect Markets Long Before It’s Reinstated

Traders in short-term funding markets are already busy assessing the potential impact of the U.S. debt ceiling coming back into force in the second half of this year even as Congress trains its focus on more immediate matters like finalizing President-elect Joe Biden’s victory this week.

The country’s borrowing limit, which was suspended back in August 2019, is scheduled to come into effect once again on Aug. 1. Without a Congressional deal that extends or defers it once again, the Treasury will eventually have its ability to borrow curtailed, although it has historically found ways to delay officially hitting that limit.

Perhaps more critically for dollar funding markets, the reinstatement of the ceiling is also likely to cause the Treasury to slash its cash pile. Just how it does that could have a marked impact. The amount of cash that the Treasury currently holds is around $1.73 trillion, but it will need to whittle that down over the next seven months to the level it was at when the last ceiling suspension took place -- around $118 billion. That’s a far bigger reduction than it has historically had to do around debt-limit episodes.

The Covid-19 pandemic and the government’s response to its economic fallout are at the heart of this dilemma. To fund emergency stimulus measures, the Treasury ramped up its issuance of debt -- in particular short-dated Treasury bills. Now that they need to shrink the cash pile, there is a risk that the supply of bills will drop too quickly, forcing market rates below zero and forcing the central bank to intervene.