Rate sensitivity
How much a holding moved, on average, when the 10-year Treasury yield moved — read like a bond's duration.
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How it is computed here
Two years of daily returns regressed on the change in the US 10-year Treasury yield that day and the day before; the two slopes added, with the sign flipped, are the sensitivity. The day before counts because markets outside New York close before the Treasury sets its yields, so part of a day's move reaches their prices the next morning. A holding is measured in its own currency; the whole portfolio in yours.
Worked example
This one is worked on real prices against the U.S. Treasury curve, and the demo's prices are generated — so there is no honest example to show here. On your own portfolio it appears once the curve is loaded.
Where it misleads
It is measured from past prices, not declared by any fund, and it only holds while the relationship does. Always read it with its R²: a sensitivity on a low R² describes a cloud, not a bond. A euro bond fund measured against the US curve will show a low R² — that is the right answer, not an error.