twenty overall in market cap (thus allowing large recently IPO'ed companies to be included). Weighting The IBEX 35 is a capitalization-weighted index. The market cap used to calculate the weighting of each constituent is multiplied by a free float factor (ranging from 0.1 to 1) depending on the fraction of shares not subject to block ownership. Any company with 50% or more of its shares considered free float is given a free float factor of 1. Unlike many other European benchmark indices, the weightings of companies in the IBEX 35 are not capped. As of 2015, international funds based abroad (chiefly in Norway, the United States, the United Kingdom and Qatar) owned 43% of the index, vs. 16% in 1992. Such rate of foreign investment was about 5% above the EU average. Calculation The index value (given here as I) of the IBEX 35 index is calculated using the following formula: with t the moment of calculation; Cap the free float market cap of a specific listing and J a coefficient used to adjust the index on the back of capital increases or other corporate actions so as to ensure continuity. The formula can be adjusted to accommodate changes in index structure, such as the temporary suspension of companies pending news. Specification IBEX Mini futures contracts are traded on the MEFF Renta Variable (MEFF-RV) exchange under the ticker symbol BIBX. The full contract specifiactions for IBEX Mini futures are listed below. Components As of June 1, 2021, the following 35 companies make up the index: Record values The index reached the following record values: Annual returns The following table shows the annual development of the IBEX 35 since 1992. Related indices IBEX Medium Cap: It is composed by the 20 listed Spanish companies with the largest capitalization after those included in the IBEX 35. IBEX Small Cap: It is composed by the 30 listed Spanish companies with the largest capitalization after those included in the IBEX Medium Cap. IBEX Top Dividendo. BME Growth: a sub-market of Bolsas y Mercados Españoles (BME) for smaller companies to float shares with a more flexible regulatory system than is applicable to the main market. Past components All changes are due to market capitalisation unless stated otherwise. Abengoa Abertis Infraestructuras Aceralia (merged with Arbed and Usinor to from Arcelor) Agromán Aguas de Barcelona Altadis Amper Antena 3 TV Arcelor Asland (not listed anymore) Asturiana de