Weak utility stocks, HSBC take spark out of FTSE

By Sudip Kar-Gupta and Alistair Smout LONDON (Reuters) - Britain's top share index edged lower on Monday, hurt by a fall in HSBC after the bank admitted tax failings at its Swiss unit and by softer utility stocks. The blue-chip FTSE 100 index was down 0.2 percent, or 16.29 points, at 6,837.15 points by the close, with United Utilities, National Grid and Severn Trent falling by between 3.1 and 2.1 percent. Traders said utility stocks fell on rising debt yields following a drop in shares of t