17 May 2021 | 16:39pm StockMarketWire.com - On an up and down (and up) day the FTSE 100 ended up erasing earlier losses to trade only slightly lower at 7,032.85. The move, which came as most of the UK eased coronavirus restrictions, came despite a weak start on Wall Street with the S&P 500 down 0.5% to 4,151.47 by 4.30pm UK time. Technical products and services provider Diploma rallied 6.8% to £29.38, having upgraded its annual outlook thanks to a boost from acquisitions, particularly WCW, and improved underlying trading. Diploma's annual revenue was now expected to be slightly better than 40% ahead of the 2020 financial year, with an increase in its margin towards 19%.