Bond Vigilantes, the Term Premium and Rising Treasury Yields

Where the term comes from

Ed Yardeni, a Wall Street economist, titled the 27 July 1983 issue of his weekly commentary "Bond Investors Are the Economy's Vigilantes." His conclusion, as he later quoted it: "So if the fiscal and monetary authorities won't regulate the economy, the bond investors will. The economy will be run by vigilantes in the credit markets."

The mechanism is simple. A bond pays a fixed stream of interest. When investors sell, its price falls and its yield, the return a new buyer locks in, rises. Higher government bond yields raise the cost of new public borrowing and feed through to mortgages, corporate loans and the value of every existing bond. A government that wants to keep borrowing cheaply has to keep its lenders willing.

No organised group is involved. "Vigilantes" is shorthand for many independent investors reaching the same conclusion at about the same time, usually about inflation, deficits or the credibility of policy.

What sets a long-term yield

A 10-year Treasury yield has two parts:

• Expected short-term rates. What investors think the Federal Reserve's policy rate will average over the next ten years. This part rises when the market expects the Fed to raise rates or hold them higher.
• The term premium. CBO defines it as "the additional returns that investors require to hold a longer-term bond instead of a series of shorter-term securities." CBO notes that concern about weak global growth and demand for Treasuries as a hedge against falling inflation pushed term premiums down over the decade before its February 2026 report, and expects those forces to fade.

Neither part can be observed directly, so economists estimate them with models. This guide uses the Federal Reserve Bank of New York's ACM model, which publishes daily estimates back to 1961. Other models give different estimates.

The split matters for the vigilante story. A rise driven by expected short rates is mostly about the Fed. A rise in the term premium is investors asking to be paid more for the risk of holding long-term government debt, which is closer to what Yardeni described.

1994: a Fed cycle the bond market ran ahead of

The 10-year Treasury yield bottomed at 5.19% on 15 October 1993 and peaked at 8.05% on 7 November 1994, according to Treasury's daily yield curve. The 30-year yield rose from 5.78% to 8.16% over the same period.

The Federal Reserve raised its target for the federal funds rate six times in 1994, from 3.00% to 5.50%, starting on 4 February. It raised it once more, to 6.00%, on 1 February 1995.

The ACM model attributes most of the move to expected short rates. Between those two dates its estimate of the expected-rates component rose by 1.94 percentage points and the term premium by 0.67 points, from 1.99% to 2.66%. So roughly three quarters of the rise was the market pricing a tighter Fed, and a quarter was a higher premium for holding long-term debt.

The UK in September 2022

On Friday 23 September 2022 the UK government announced its Growth Plan, a package of tax cuts. The Bank of England's account to Parliament records what followed:

• Sterling fell about 4% against the dollar that day, and long-term gilt yields rose by 30 basis points.
• The 30-year gilt yield rose 160 basis points in a few days. It had been around 1.2% at the start of the year.
• That period included two daily rises of more than 35 basis points in the 30-year yield. The largest daily rise in data back to 2000 had been 29 basis points.
• On Wednesday 28 September, the intraday range of the 30-year yield was 127 basis points, larger than the full-year range in all but four of the previous 27 years.

Leverage made it worse. Liability-driven investment (LDI) funds used by defined-benefit pension schemes hold leveraged gilt positions. As yields jumped, their cushions eroded, leaving them to sell gilts into a falling market or ask pension schemes for more cash. On Tuesday 27 September, LDI managers told the Bank that several funds were likely to fall into negative net asset value, which risked a large sale of gilts held as collateral by their lenders. On 28 September the Bank of England began temporary purchases of long-dated gilts, with capacity of up to £65 billion. It bought £19.3 billion between 28 September and 14 October, £12.1 billion of conventional and £7.2 billion of index-linked gilts, and sold them back between 29 November 2022 and 12 January 2023.

On 17 October 2022 Chancellor Jeremy Hunt reversed almost all of the Growth Plan's tax measures not yet legislated, worth around £32 billion a year, according to HM Treasury. Twenty-four days after the announcement, most of the tax package had been withdrawn.

2023: a US term premium move

Between 28 June and 19 October 2023, the 10-year Treasury yield rose from 3.71% to 4.98%. Unlike 1994, the ACM model attributes almost all of that to the term premium, which went from minus 0.97% to plus 0.45%, while its estimate of expected short rates was little changed. The Fed raised its target range only once in that period, to 5.25% to 5.50% in July 2023.

This is closer to what Yardeni described: long-term yields rising without a matching change in the expected path of the Fed, because investors want more compensation for holding long-term government debt. Our Treasury auction guide shows how that demand is measured sale by sale.

What yields and the term premium show in October 2026

Source: Treasury daily par yield curve rates. In 2026 the 10-year yield has ranged from 3.97% on 27 February to 5.31% on 5 October. The 30-year reached 5.67% on 7 October.

The model's fitted 10-year yield differs slightly from Treasury's par yield. Its data run to 26 October 2026.

Three readings from the data:

• Most of the past year's rise is about the Fed. Of the 0.91-point rise in the model's 10-year yield from 27 October 2025 to 26 October 2026, expected short rates account for 0.78 points and the term premium for 0.13. The Fed cut to 3.50% to 3.75% in December 2025, then raised its target to 3.75% to 4.00% on 16 September 2026, citing elevated inflation. The 2-year yield, which tracks the Fed outlook most closely, rose 1.22 points over the year.
• The term premium spiked in early October. It reached 0.98% on 7 October 2026, the highest since June 2014. That week the 10-year yield hit its 2026 high of 5.31% (5 October) and the Treasury sold 10-year notes at 5.300% (7 October). By 26 October the premium had eased to 0.63%.
• The premium is back above zero. It was minus 0.79% at the end of 2019 and minus 1.66% on 9 March 2020, the lowest in the model's history back to 1961. A positive premium means investors are again charging to hold long-term Treasury debt, which raises the cost of every long-term note and bond the Treasury sells. See interest on the national debt for how that feeds through to the budget.

What to watch

• The FOMC decision on 28 October 2026 and the path it signals for the policy rate, which drives the expected-rates part of long yields.
• Treasury's quarterly refunding, held near the middle of each calendar quarter (the next in November), where it sets out note and bond auction sizes for the months ahead.
• Auction results for 10- and 30-year securities: bid-to-cover, dealer share and the gap between high and median yields.
• The term premium, published daily by the New York Fed. A rise in long yields without a matching rise in the 2-year is the signature of a term premium move.
• The debt limit. CBO expects the Treasury to reach it in 2027; see the debt ceiling guide.