|1. Valuation Multiples Resources|
|2. Cost of Capital Resources|
|3. Sector Analysis Resources|
|- Institutional public sources|
|- Private sources|
|BANCO DE ESPAÑA|
Its Statistical Bulletin provides historic yields of the Spanish and EU-15 10-year bonds, including series since 1987 (section 26.23 - Sovereign debt long-term yields). It also offers data about the daily yield of several kinds of sovereign debt. Free.
|INSTITUTO NACIONAL DE ESTADÍSTICA|
It provides monthly series of 10-year sovereign debt since 1990 (Inebase, financial and monetary statistics, interest rates). Free.