Good for ↑
The gap between 10-year and 3-month Treasury yields jumped 21 basis points in 5 days, to 101. That 2.3 standard deviation move signals a break from the flat curve that hurt bank lending margins for 18 months. Regional banks' outlook has improved, but their shares still reflect the old curve.
Source: FRED ↗
The gap between 10-year and 3-month Treasury yields widened 21 basis points in five trading days, to 101 basis points. That is a 2.3 standard deviation move. It suggests the flat or inverted curve is ending. Since 2023 that curve has hurt bank net interest margins, what banks earn on loans minus what they pay on deposits. A steeper curve helps banks, and the question is how much. Regional bank shares still trade 15-25% below their pre-inversion price to tangible book value. Analysts, anchored to the last 12 months of data, have not raised their 2027 margin estimates. If the gap stays above 100 basis points through the fourth quarter of 2026, margins could gain 20-40 basis points, lifting earnings per share 8-15%. The 10-year yield at 5.26% suggests the move comes from selling of long-dated bonds, not hopes of rate cuts. This kind of steepening has helped banks most once deposit costs peak, as they have in this cycle.
Investors broadly accept that a steeper yield curve is good for banks. But analysts have not raised their forecasts for net interest margin, what banks earn on loans minus what they pay on deposits. Regional bank share prices have not moved either. Investors see the curve move as possibly brief, given economic uncertainty and a mild 1-week dip in the S&P.
Why that may be wrong
Analysts update their bank margin models each quarter around earnings, not as the curve moves. Their estimates rest on the last 12 months of net interest margin data, which still reflect the flat curve. Forecasts for earnings per share usually change 4-8 weeks after a lasting curve shift. The input is simple and visible to everyone. It just reaches analysts' models slowly.
The case fails if the steepening reverses within 2-3 weeks and the gap falls back below 80 basis points, before analysts raise their margin forecasts. Watch the gap between 10-year and 3-month yields each day. A lasting drop below 85 basis points would suggest the 21 basis point jump was a brief technical spike, not a real change in the curve.
Investors selling long-dated Treasuries, not hopes of rate cuts, drove the steepening and pushed the 10-year yield to 5.26%. Steepening of this kind has often come with credit stress and a slowing economy. Regional banks would then set aside more for bad loans, cancelling out wider margins. The weakest link is the idea that deposit costs have peaked. If the jump in 10-year yields makes depositors demand higher rates, the margin gain shrinks. A rise of 20 basis points or more in 30-day SOFR (a benchmark short-term lending rate) or CD rates in the next two weeks would show deposit costs climbing again. That would undo the case before it reaches earnings.
In 2020, the curve steepened sharply after COVID while the Fed held short-term rates down. Regional bank shares lagged the wider market at first. Later, as the curve kept steepening into 2021, Huntington Bancshares (HBAN) and KeyCorp (KEY) beat the S&P 500. That time, bank shares followed the curve with a delay, not right away.
The gap between 10-year and 3-month yields widened 21 basis points in 5 days to 101 basis points, a 2.3 standard deviation move. It signals a break from the flat or inverted curve that has hurt bank net interest margins since 2023.
If the gap stays above 100 basis points, regional banks' lending margins widen by 20-40 basis points, because their deposits and loans make them most sensitive to this gap. That would lift 2027 earnings per share 8-15% above current forecasts.
Regional bank stocks such as Huntington Bancshares (HBAN), KeyCorp (KEY) and Regions Financial (RF) trade at prices to book value that still reflect the flat curve. Analysts' margin models rest on the last 12 months of data. They may not show the curve shift until third-quarter results in mid-October, so share prices could lag for 2-4 weeks.
Earlier connections in the same sector that share a theme with this one.
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