Real (TIPS) · Butterfly · 2 Oct 2026
5Y · 10Y · 30Y −19bp
A butterfly sets the middle maturity of three, the belly, against the two wings either side.
Real (TIPS) 5s10s30s butterflies from 4 Oct 2021 to 2 Oct 2026: 5s10s30s currently −19bp, ranging −50bp to +17bp.
TIPS real yields: the return Treasury bonds pay above inflation once their inflation-linked principal is stripped out.
5Y · 10Y · 30Y −19bp: 55th of 1y, 41st of 5y, 47th of 10y, 47th of since 2010. High is a cheap belly against the wings, low is a rich one.
A butterfly sets the middle maturity of three, the belly, against the two wings either side. It measures bend, so a shift that lifts all three legs cancels.
Twice the belly’s real yield, with each wing taken off, in basis points. The name lists its three maturities, short wing first.
Positive puts the belly cheap against its wings, negative dear. It swings either side of zero and rarely trends.
A belly sitting 10bp under the average of its wings prints a fly of −20bp, because the belly counts twice.
A fly needs all three legs to print, so one missing leg leaves the day blank instead of partial. The belly moves first when the timing of a policy turn is repriced.
US Treasury · NBER · daily TIPS par yield curve · butterfly computed here
2 Oct 2026 · real par yields, Treasury, around 3:30pm ET
| Tenor | Real yield | 1D | 1W | 1M | 1Y | %ile 5y |
|---|---|---|---|---|---|---|
| 5Y | 2.69% | +4 | +5 | +50 | +137 | 99 |
| 7Y | 2.80% | +4 | +7 | +49 | +125 | 99 |
| 10Y | 2.92% | +4 | +9 | +47 | +112 | 99 |
| 20Y | 3.19% | +3 | +11 | +41 | +94 | 100 |
| 30Y | 3.34% | +3 | +12 | +36 | +85 | 100 |
tenors 1, 5, 21, 252 trading days; anchors 1, 7, 30, 365 calendar
| Pair | BP | 1D | 1W | 1M | %ile 5y |
|---|---|---|---|---|---|
| 5s10s | +23bp | 0 | +4 | −3 | 52 |
| 5s30s | +65bp | −1 | +7 | −14 | 54 |
| 10s30s | +42bp | −1 | +3 | −11 | 58 |
long − short, in basis points
| Fly | BP | 1D | 1W | 1M | %ile 5y |
|---|---|---|---|---|---|
| 5s10s30s | −19bp | +1 | +1 | +8 | 41 |
2 × belly − wings, 50-50 weighted, not duration-neutral
| Fly | BP | 1D | 1W | 1M | %ile 5y |
|---|---|---|---|---|---|
| 5s10s30s | −4bp | +1 | 0 | +10 | 30 |
the fly with 5s30s regressed out over five years
| Line | Value | Detail |
|---|---|---|
| Inverted | 0 of 7 | pairs 2× apart in maturity |
| Deepest | — | nothing counted is inverted |
| Uncounted | — | no inversion between neighbours |
| 5s30s | not inverted | |
| Month | Bear Flattener | Δ level +44bp · Δ slope −15bp over a month |
| Line | Value | Detail |
|---|---|---|
| Last episode | 42 sessions | 11 Aug 2023 → 11 Oct 2023 |
| Deepest (25 Aug 2023) | −20bp | |
| Area | 433 | basis points × sessions below zero |
| Un-inverted (12 Oct 2023) | 1086 days ago | calendar days, not sessions |
5s30s episodes of 20 sessions or more, since 22 Feb 2010
| Line | Value | Detail |
|---|---|---|
| 10Y vol | 83bp | annualised, 21 sessions |
| Rank · 5y | 56th | |
| Shape share | 0.70 | 5s30s vol ÷ 10Y vol |
realised standard deviation of daily changes, annualised
| Line | Value | Detail |
|---|---|---|
| 1y | −8.0% | |
| 5y | −25.8% | not annualised |
| Worst fall (3 Aug 2021) | −29.7% | peak to trough, bottoming 25 Oct 2023 |
| Since then | −28.2% |
a rolling 10Y par bond, coupon and price. Not a fund
| Anchor | Value | Detail |
|---|---|---|
| NBER (dated to 1 Sep 2026) | not in a dated recession | NBER dates turning points about a year late |
Spreads and butterflies are derived here from the published real yield curve. They are not published by any source. A dash means the value could not be computed or was too thin to rank, never zero.