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Explained in plain English

What is the FTSE 100?

The FTSE 100 is an index of the 100 largest companies listed on the London Stock Exchange. It's a good snapshot of how the UK's biggest businesses are performing. When the FTSE 100 falls, as it did in the story, it generally means these major companies are losing value, which can reflect broader economic concerns in the UK.

Stories that explain this

UK shares fall over inflation worries as oil passes $100 a barrel London's blue-chip FTSE 100 index barely moves ahead of American inflation figures UK shares fall for 7th day, but oil giants defy the trend

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