Britain\'s blue chip shares posted their biggest one-day loss since July on Thursday on concerns the Federal Reserve could end its stimulus programme sooner than expected, removing a driver of the recent equity rally. The FTSE 100 closed down 103.83 points, or 1.6 percent, at 6,291.54, dropping below the 6,300 level for the first time in 10 days. Stocks that benefit the most in rising markets, or \"cyclicals\", fell furthest. The index\'s decline was the biggest since last July, at the height of the euro zone crisis and just a few days before European Central Bank chief Mario Draghi promised to do \"whatever it takes\" to save the euro, prompting a global rally in equities. arabnews