Shares in the London Stock Exchange Group, the UK’s biggest share trading market, fell more sharply than the wider market as trading resumed this morning following news it is to lose its mantle as a FTSE 100 company. The LSE will cease to be in the ranks of blue-chip UK-listed stocks after suffering a three-quarter plunge in its share price since it joined barely 15 months ago.

LSE shares dropped 1.3% to 394p by 08:31 GMT today, versus a 0.4% decline in the wider FTSE 100. They had closed at 399.25p yesterday, which translated to a 78% fall from their 1800p price at the end of trading on December 3, 2007, the day before the LSE entered the FTSE 100 index for the biggest UK-listed companies.