Reading the shape of a yield curve

Start with the instrument

A yield curve compares yields across maturities. Before interpreting its shape, identify exactly which curve is being shown: par, spot or forward; nominal or real; government or corporate. These distinctions belong in the methodology, rather than being left implicit.

The Treasury’s published par curve is constructed from indicative bid-side quotations and uses a monotone convex method. This is a modelled curve, rather than a row of directly observed transaction prices at every maturity. [1]

Make the comparison explicit

The example below pairs a starting curve with a hypothetical scenario. The numbers were created only to demonstrate the article components. They have no observation date, and neither line describes the current market.

Figure / Synthetic exampleOne curve, two illustrative statesA synthetic example of lower short-maturity yields and higher long-maturity yields.

Illustrative starting curveIllustrative scenario

Scroll horizontally to see every maturity.

Source: Synthetic values created for this format demonstration. Not Treasury or FRED observations.

Inspect the chart data

Exact plotted values. All yields are percentages.
Maturity	Starting yield (%)	Scenario yield (%)
3 months	4.20	3.80
6 months	4.05	3.70
2 years	3.80	3.60
5 years	3.65	3.60
10 years	3.90	4.00
30 years	4.10	4.30

The scenario changes different parts of the curve by different amounts. It therefore cannot be reduced to a single parallel shift. The second chart separates the change at each maturity. Positive bars extend above zero, and hatched negative bars extend below it; one basis point is 0.01 percentage point. Its exact-value table retains both yields and the resulting differences.

Figure / Synthetic exampleA change at each maturityThe scenario-minus-starting difference, in basis points, for the synthetic curves above.

Scenario minus starting yield · 1 bp = 0.01 percentage point

Scroll horizontally to see every maturity.

Source: Calculated from the synthetic format-demonstration values above. Not observed market changes.

Inspect the chart data

Exact yield changes. Yields are percentages; changes are basis points.
Maturity	Starting (%)	Scenario (%)	Change (bp)
3 months	4.20	3.80	-40
6 months	4.05	3.70	-35
2 years	3.80	3.60	-20
5 years	3.65	3.60	-5
10 years	3.90	4.00	10
30 years	4.10	4.30	20

Separate observation from interpretation

A publishable version would replace the synthetic values with a dated extract, retain the source’s units and conventions, and explain the comparison window. FRED’s DGS10 series, for example, labels its values as daily percentages on an investment basis. [2]

That observation would still need an argument. A change in the curve’s shape can motivate questions about policy, inflation, term premia or supply. The chart alone does not isolate the cause.

What an original note should add

An authored research note needs a defined question, a reproducible data extract, an explanation of the measurement choices and a clear account of what would weaken its interpretation. A downloadable spreadsheet or research PDF should accompany the piece only when the real artifact exists.

This page is a format demonstration. Original analysis, an investment thesis, a publication date and Nitin’s reviewed conclusions have not been supplied.

Sources & references

Treasury Yield Curve MethodologyU.S. Department of the Treasury↩
10-year Treasury constant maturity series (DGS10)Federal Reserve Bank of St. Louis, FRED↩

Download synthetic chart values

CSV · illustrative data