Brent crude oil is trading at $36 a barrel, down 20%, after OPEC and Russia broke off negotiations on Friday to try and cut the supply by 1.5 million barrels a day. At these levels, it completely breaks through the level indicated by the sector as break even, namely 45-55 dollars. Banco Sabadell analyses the sensitivity of the stocks they cover to variations in crude prices: Repsol, Total and ENI.