Keywords: yield curve, bear steepener, 2s10s spread, XLF, bank net interest margin, Fed rate hike

Key Highlights

  • The 2-year Treasury Yield closed at 4.81 percent and the 10-year at 5.17 percent on September 25, leaving the 2s10s spread at about 36 basis points, Federal Reserve data show.
  • The spread widened from 20 basis points on September 21, a 16 point move in four sessions and roughly 44 percent wider over three months.
  • A steeper curve can support lending margins for the Financial Select Sector SPDR Fund (NYSEARCA:XLF), though the fund fell 2 percent on September 22.
  • Big banks open third-quarter Earnings on October 13, with net interest income and Credit quality in focus.

Anatomy of a Bear Steepener

A bear steepener occurs when long yields rise faster than short yields, and that is what the data show. Between September 22 and September 25, the 2-year rose 10 basis points, from 4.71 percent to 4.81 percent, while the 10-year climbed 21 basis points, from 4.96 percent to 5.17 percent, by simple arithmetic on Federal Reserve closes. The daily 2s10s series moved from 0.20 on September 21 to 0.25, 0.26, 0.31 and then 0.36. The 2-year, the Maturity most tied to Fed policy, briefly swung to 4.87 percent on September 24 as October hike odds jumped, then eased. Short-dated exposure such as the iShares 1-3 Year Treasury Bond ETF (NASDAQ:SHY) has therefore absorbed far less of the selloff than longer maturities.

Why the Curve Steepens While the Fed Hikes

Steepening usually arrives when the Fed cuts. This time the Fed raised rates to 3.75 percent to 4.00 percent on September 16, and CME FedWatch priced 72.5 percent odds of another hike on October 28 as of September 28. The curve is steepening anyway because the long end is carrying term premium and Inflation risk: Brent near USD 108, year-ahead consumer inflation expectations of 4.6 percent in the University of Michigan survey, and a federal Deficit near USD 2 trillion. The curve is now well clear of the deep inversion that bottomed near minus 108 basis points during the July 2022 to September 2024 episode. For the Financial Select Sector SPDR Fund (NYSEARCA:XLF), the shape matters as much as the level, since banks borrow short and lend longer. The dot plot also lifted the 2027 median to 4.1 percent and pushed the expected return to 2 percent inflation out to 2029, a path that keeps short yields high even as long yields climb faster.

Margins Versus Marks for the Banks

The trade-off for lenders is not simple. A wider 2s10s gap can lift net interest margins over time, yet higher long yields cut the value of bond holdings and raise refinancing stress for borrowers. On September 22, when the spread was narrower, the Financial Select Sector SPDR Fund (NYSEARCA:XLF) fell 2 percent to USD 54.84 and JPMorgan Chase (NYSE:JPM) dropped 3 percent to USD 340.23. Credit is a second channel: Fitch put the private credit default rate at a record 6.3 percent in August, and the office CMBS delinquency rate reached 13.2 percent, according to CRED iQ. Regulators are also still reviewing the Basel III endgame re-proposal, which would ease Capital requirements. FactSet shows JPMorgan Chase, Wells Fargo, Citigroup and Goldman Sachs all scheduled to report on October 13, when commentary on net interest income will offer the first hard read on whether a steeper curve is feeding through.

Where Things Stand

It is both, depending on the horizon. A 36 basis point spread built on rising long yields supports future lending margins, which is the constructive case for the Financial Select Sector SPDR Fund (NYSEARCA:XLF). The warning is in the driver: term premium and inflation risk, not rate cuts, are doing the steepening, which pressures bond portfolios and indebted borrowers. The October 13 bank earnings kickoff, plus PCE data on September 30 and payrolls on October 2, will show which effect dominates. A renewed flattening would follow if hot data lift the 2-year faster than the 10-year.