The FTSE 100 ends trading lower as concerns rise following US strikes that investors believe could undermine recent optimism around peace. According to The Independent, the index closes down 79.05 points, or 0.8%, at 10,425.96. The report links the decline to market reaction to developments associated with the strikes, suggesting traders are reassessing risks in the near term. The Belfast Telegraph also reports a similar move in the FTSE 100 in the same context, indicating the drop is broadly observed across coverage of the session. Overall, the articles present the same core picture: the FTSE 100 finishes the day modestly lower, with sentiment influenced by expectations that the US actions may affect prospects for peace. The reporting does not provide further details about specific strike locations or broader economic drivers beyond the stated connection to peace optimism.