Raspberry Pi is trading at £618.50, down 13.07% for the September 28 session, with profit-taking after record first-half results the clearest reported explanation. - No new company-specific announcement was identified. - Reuters reported strong revenue and core-profit growth alongside an upbeat annual outlook. - Rising oil prices and Treasury yields pressured broader markets, but available evidence does not establish them as the direct cause of Raspberry Pi’s larger drop.