FTSE 100 slides as Fed’s relief fades amid mixed earning updates UK Market: The UK stock market was trading in the negative territory on Thursday, with the blue-chip FTSE100 index losing over 0.1 per cent. This happened after mixed earning updates from companies and rising concerns about the darkening economic outlook overshadowed the relief provided by Fed with its less hawkish comments that had encouraged a rally on Wall Street. However, some companies, including Shell and Centrica reported extraordinary profits owing to soaring commodity prices. Shell plc ( LON: SHEL ): The shares of the oil and gas giant, Shell plc, surged by 1.94%, with a day’s high of GBX 2,158.50. The company has reported record-high earnings of £9.4 billion in the second quarter and is going for a £4.9 billion share buy-back. Centrica plc ( LON: CNA ): The shares of the British electricity and gas provider, Centrica plc, plunged by 1.69%, with a day’s high of GBX 89.44. The company has reported adjusted operating profits of £857 million and has also restarted dividend payments.