The FTSE 250 ended down slightly at 23,996.81, while the AIM All-Share closed down 6.09 points, 0.8%, at 761.85. Market pricing puts the chances of the US Federal Reserve raising interest rates at around 34%, making it one of the most uncertain meetings in years. He has told us nothing about his willingness or desire to raise rates, so we don't know if he intends to do so or not. I think probably not, but that uncertainty is reflected in market pricing," the analyst added. Against the euro, sterling was slightly lower at 1.1673 euro from 1.1674 euro.