When Treasuries Stop Acting Like a Safe Haven

01 / DEFINE THE PROTECTIONSafe in which sense?

The government’s payment obligation does not fix the resale price of a Treasury. If market yields rise, an existing fixed-rate bond becomes less attractive relative to new borrowing at higher yields, and its price falls. For otherwise comparable bonds, longer maturities generally mean greater sensitivity to rates. [1]

That creates two very different investor experiences. Someone holding an individual nominal Treasury to maturity is focused on scheduled payments and face-value repayment. Someone who may sell next month is exposed to a market price that can change. A premium purchase also means the amount paid can exceed the face value eventually repaid. [1]

02 / READ THE SHOCKWhy a defensive position can fall

In a growth scare, my starting scenario would be demand for government debt and expectations of easier policy. Both can support prices. In an inflation scare, investors may instead expect tighter policy for longer. The key is the change relative to what was priced, not simply whether rates already seem high.

The New York Fed separates longer-term yields into the expected path of short-term policy rates and a term premium: compensation for holding longer debt. Neither component is directly observable, and estimates depend on the method. A long yield can rise without a new Fed hike if expectations or that compensation change. [2]

A third possibility is a need for cash. Investors may sell assets they can sell, including Treasuries. New York Fed research on March 2020 documents broad selling linked to the dollar’s role in investment and funding. A highly liquid asset can become a source of liquidity during stress. [3]

03 / A REAL STRESS TESTMarch 2020: safety met the dash for cash

After an initial Treasury rally, the ten-year yield rose from 0.55% on March 9 to 1.20% on March 18, 2020. The New York Fed describes deteriorating liquidity, leveraged trade unwinds and limits on dealers’ ability to absorb sales. This was a market-functioning episode, not evidence that every future crisis will follow the same path. [4]

04 / PUT IT IN A PORTFOLIOChoose the job before choosing the bond

For near-term spending, I would examine whether maturity matches the date the money is needed. For an equity hedge, I would test the inflation scenario as well as the recession scenario. The hedge can disappoint if the same inflation surprise pushes both equity valuations and long-bond prices lower. That is a scenario to assess, not a claim of a permanent stock–bond relationship.

An individual bond and a bond fund also solve different problems. A fund’s holdings and market value change; owning a conventional bond fund does not promise repayment of your purchase price on a chosen date. SEC guidance highlights interest-rate and other risks in bond funds. [5]

TIPS address a different concern: their principal adjusts with inflation, and at maturity Treasury pays the greater of adjusted or original principal. That does not lock their resale price. Inflation protection and protection against a rise in market yields are separate features. [6] [1]

My conclusion is to describe the protection precisely. “I want reliable nominal payments on a specified date” is a stronger investment explanation than “bonds go up when stocks fall.” For the related borrowing-cost mechanism, see Research Note 005.