Oil prices had one of their biggest ever falls after the effective collapse of an agreement between Saudi Arabia-led Opec and Russia. The agreement was designed to support the market against the impact of coronavirus. Senior energy correspondent Anjli Raval explains. See if you get the FT for free as a student (http://ft.com/schoolsarefree) or start a £1 trial: https://www.youtube.com/redirect?v=xt0Ud4v_t78&redir_token=bubfuMp6XlWD3aRATJyCp8L9vtp8MTU4NDE5ODY3MEAxNTg0MTEyMjcw&event=video_description&q=https%3A%2F%2Fsubs.ft.com%2Fspa3_trial%3FsegmentId%3D3d4ba81b-96bb-cef0-9ece-29efd6ef2132
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