The London Stock Exchange strengthened its negotiating hand in the battle for market consolidation with a 60pc increase in operating profits to £81.3 million ($154.5m)for the first half on revenues up 20pc at £163.3 million ($310.3m).

The LSE said it was on course for an “excellent” set of full-year results, and lifted the dividend by 50pc to 6p a share.

The Times (London) reported that “executives, led by Clara Furse, chief executive, and chairman Chris Gibson-Smith, were tight-lipped about their plans for the next stage of a set of international exchange mergers that centres on London, America’s Nasdaq, pan-European exchange Euronext, the New York Stock Exchange, and Germany’s Deutsche Borse”.

Gibson-Smith commented : “The exchange has once again demonstrated the value it creates for market users and for our shareholders. We are well positioned for continuing success going forward, and the results achieved in the first half of the year support our expectation of an excellent result for the full year.”

Meanwhile, Deutsche Borse also reported strong quarterly and nine-month earnings. Yesterday it pulled out of strategic talks with the Italian Stock Exchange over a joint proposal to merge with Euronext.

Clara Furse was reported as saying : “New issues, new products and net technology are combining to facilitate a structural shift in equities trading, significantly improving the quality of the market for our increasingly international customer base and creating more value for shareholders.”

It will be interesting to see what comes out of the discussions with the Tokyo Stock Exchange. These number won’t do the LSE’s case any harm at all.

Euronext has announced that it supports a proposal to merge its stock exchanges with Deutsche Borse and Borsa Italiana, as long as it is part of its merger with the New York Stock Exchange.

The intriguing possibility now opens up of an even bigger transatlantic giant emerging to challenge the London Stock Exchange.

With Nasdaq in talks with the hedge funds which own 30pc of LSE shares and a figure of 1300p being bandied about as the cost of buying out these shares, it’s beginning to look like two great pan-Atlantic exchanges may emerge over the next 12 months.

Unless, that is, Clara Furse can find a white knight to save the old LSE.

Euronext, the Pan-Continental stock exchange, is said to be pressing on with its plans to merge with the New York Stock Exchange. Final clearance should be obtained by January.

Suggestions that Euronext may walk away from the NYSE deal in favour of a tie-up with Deutsche Borse and Borsa Italiana, have been scotched by a number of sources.

Meanwhile, the London Stock Exchange waits on the next move by Nasdaq, which can now launch a full bid for the LSE, if that’s its intention.

John Thain, CEO of the New York Stock Exchange, has said he will not improve terms of its £10.7 billion merger with Euronext, despite noises from rival Deutsche Borse that its proposal was worth more.

The Times (London) reports: “Speaking to journalists in New York last night, and reported by AFP, Mr Thain said he noted continued moves by Deutsche Borse to lure Euronext away from the agreed merger but said he would not increase his offer price, whatever plan the German exchange came up with.”

Euronext said: “This first half of the year has been the best one ever for cash and derivatives markets and has created the conditions for all business lines to register an increase in their revenues. This strong performance has been achieved in spite of the impact of changes in the scope of consolidation.”

Euronext’s Chief Executive, Jean-Francois Theodore, and John Thain have said they are on course to complete their landmark merger during the first quarter of next year.