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The IBEX Small Cap (IBEXS) is a stock market index created by Bolsas y Mercados Españoles (BME) that tracks the performance of small-cap companies listed on the four Spanish stock exchanges that trade through the Sistema de Interconexión Bursátil Español (SIBE). It is a capitalization-weighted index. It consists of the 30 largest companies following those in the IBEX Medium Cap.2 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
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The IBEX Small Cap (IBEXS) is a stock market index created by Bolsas y Mercados Españoles (BME) that tracks the performance of small-cap companies listed on the four Spanish stock exchanges that trade through the Sistema de Interconexión Bursátil Español (SIBE). It is a capitalization-weighted index. It consists of the 30 largest companies following those in the IBEX Medium Cap. Its ISIN is ES0SI0000021.2
On March 1, 2005, Bolsas y Mercados Españoles announced the creation of the IBEX Medium Cap (mid-cap stocks) and IBEX Small Cap (small-cap stocks) indices. Both were officially launched on July 1, 2005.
From Wikipedia’s article on IBEX Small Cap, shared under CC BY-SA 4.0.3
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