LSE makes £90.4m net profit in 2010Profit after tax and minority interests was £90.4m at the London Stock Exchange group in 2010, up from a loss of £338m in 2009. The results cover the period between April 1 2009 and March 31 2010.. Total revenue from derivatives was £19.5m, down 24% year on year, and revenue fell in both the UK and Italy. Volume at EDX fell 8% in the year because of a fall in Scandinavian business, but Russian derivatives volume doubled to 37.4m. IDEM volumes rose 11%, which the exchange attributes to the tariff caps introduced earlier in the year. Clearing revenue across all asset classes rose 4% in the month to £33.4m.The exchange group spent £16.3m during the year acquiring Turquoise and...