For calculating the daily yield curve of Confederation bonds

<span class="paragraph">
Daily data collected using the ‘2002 methodology’ is available up to and including July 2025. The current Nelson-Siegel-Svensson parameters are published in the <a href="en/warehouse/SNB1A/facets">supplementary data</a>.
</span>

<span class="paragraph">
The Nelson-Siegel-Svensson parameters are described in the <a href="en/topics/ziredev/doc/explanations_ziredev#interest_rates_meth_par_siegel">notes</a>.
</span>