Another essay, a bit shorter this time, on maturity structure of US debt. I was asked to give comments on a paper by Robin Greenwood, Sam Hanson, and Jeremy Stein
*
at a conference at the Treasury. It's a really nice paper, and (unusually) I didn't have much incisive to say about it, except to say it didn't go far enough. And, I only had 10 minutes. So I gave a speech instead. (The
pdf version on my webpage may be better reading, and will be updated if I ever do anything with this.)
Having your cake and eating it too: The maturity structure of US debt
John H. Cochrane
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November 15 2012
Robin Greenwood, Sam Hanson, and Jeremy Stein
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nicely model two important considerations for the maturity structure of government debt: Long–term debt insulates government finances from interest-rate increases. Short-term debt is highly valued as a “liquid” asset, providing many “money-like” services, and potentially displacing run-prone financial intermediaries as suppliers of “liquidity.” Long-term debt also provides some liquidity and collateral services, (Krishnamurthy and Vissing-Jorgensen
3 (2012)) but not as effectively as short-term debt. How do we think about this tradeoff?
Posing the question this way is already a pretty radical departure. The maturity structure of U.S. debt is traditionally perceived as a relatively technical job, to finance a given deficit stream at lowest long-run cost, as Colin Kim eloquently explained in the panel. Greenwood, Hanson and Stein, along with the other papers at this conference, are asking the Treasury’s Office of Debt Management to consider large economic issues far beyond this traditional question. For example, saying the Treasury should provide liquid debt because it helps the financial system and can substitute for banking regulation, whether or not that saves the Treasury money, asks the Treasury to think about its operations a lot more as the Fed does. Well, times have changed; the maturity structure of US debt does have important broader implications. And getting it right or wrong could make a huge difference in the difficult times ahead.
Go Long!
As I think about the choice between long and short term debt, I feel like screaming
4 “Go Long. Now!” Bond markets are offering the US an incredible deal. The 30 year Treasury rate as I write is 2.77%. The government can lock in a nominal rate of 2.77% for the next 30 years, and even that can be paid back in inflated dollars! (Comments at the conference suggested that term structure models impute a negative risk premium to these low rates: They are below expected future short rates, so markets are paying us for the privilege of writing interest-rate insurance!)