03 / Publish and reference
Share a reproducible scenario link or embed this interactive research tool on your own website. The embed points to the live BondStats calculator and includes a visible source link. No data is transmitted to BondStats by the calculator itself; a website visit may still generate standard server logs.
04 / Reading the regimes
What is bull steepening?
Both yields fall, with the short-term yield declining more than the long-term yield. The 10Y minus 2Y spread increases.
What is bear steepening?
Both yields rise, with the long-term yield rising more than the short-term yield. The curve becomes steeper.
What is bull flattening?
Both yields fall, with the long-term yield falling more than the short-term yield. The curve flattens.
What is bear flattening?
Both yields rise, with the short-term yield rising more than the long-term yield. The curve flattens.
How are mixed and parallel moves classified?
If the yields move in opposite directions, or one is unchanged, the result is labeled a mixed shift rather than forcing a bull/bear label. Equal shocks are classified as parallel shifts. The model compares only two maturities and does not infer the shape of the full yield curve.
Method: final yield = initial yield + shock / 100; slope = (10Y − 2Y) × 100 bp; slope change = 10Y shock − 2Y shock. Educational analysis, not investment advice. Explore the yield curve research methodology and downloadable Python models.