Two weeks ago, 5% on the 30-year Treasury was the level long-term bond buyers were waiting for - and now it isn't.
Citigroup says the new line in the sand is 5.5%.
Jim McCormick, Citi's London-based macro rates strategist, told clients that the focus has shifted to 5.5% as the next key level for the 30-year US Treasury yield, after the long bond cleared 5% earlier in May and topped 5.18% on Tuesday - the highest in nearly 19 years.
His blunt summary: "Investors' calculus in terms of buying the dip on Treasuries has changed."
The auction tape backs that up. The Treasury sold $25 billion of 30-year bonds on May 13 at a yield of 5.046%, the first 30-year auction to clear above 5% since 2007.
That auction landed inside an even bigger week of supply - the US government issued $691 billion of Treasury securities over those five days, leaning hard on a market already showing signs of fatigue.
The bond market has spent two decades treating 5% as the level where long-term buyers show up, and that level just reset half a point higher.
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The harder line in McCormick's note was about the Fed itself, with the strategist warning that the market is "underestimating the risk of the Fed beginning to hike rates this year."
Most of the bond rally heading into May was built around the idea that the Fed's next move is a cut, but McCormick is saying enough investors now think the next move could be a hike - which is keeping yields drifting higher.
The catalyst has been oil. Prices have spiked since the US conflict with Iran began, and that pressure has been showing up in inflation prints for the last two months.
Rising bond yields mean falling bond prices, while also lifting borrowing costs across the economy - from mortgages to corporate loans. The 30-year mortgage moves roughly in step with the 10-year Treasury, so a yield curve that drifts another half point higher would put fixed mortgage rates back near where they sat at the 2023 peak.
The 30-year has run roughly 60 basis points higher since the start of May, with the 10-year crossing 4.6% last week.
Higher long rates compete with stocks for investor dollars and push down the price investors will pay for future earnings, which is why every basis point matters for equity valuations right now.
For an investor watching this happen, the question isn't whether yields can reach 5.5% - it's what stock multiples look like if they do.
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