The Business Editor of the BBC last night broke the news that at least half a dozen American investment banks are in the process of setting up a giant European stock exchange to challenge the rest.

The group includes Goldman Sachs, Merril Lynch and other “household” names. They already have successful platforms for buying and selling shares, so by combining their strength and lowering prices they will pose a formidable threat to the mainstream exchanges, especially the LSE and the proposed NYSE-Euronext conglomerate.

The BBC’s Robert Peston thought the threat may make the presumed bid for the LSE by Nasdaq more likely to succeed.

With the taming of the worst features of America’s Sarbanes-Oxley regulations in prospect, the walls that have hitherto shielded an independent LSE seem to be crumbling.

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.

The London Stock Exchange has announced that talks are going ahead with the Tokyo Stock Exchange with a view to a possible operational alliance.

The talks are part of chief executive Clara Furse’s defence of the LSE against Nasdaq, which holds 25pc of LSE shares and is thought to be preparing an all-out bid in the near future.

The LSE gave no further details of what are ongoing discussions.

With the London Stock Exchange partially trussed up by Nasdaq — with a 25pc shareholding — the American exchange has been casting its newly roving eye elsewhere, specifically, to the Far East.

In the last few weeks Nasdaq has arranged co-operation deals with exchanges in Korea and Shanghai and with the Tokyo-based Jasdaq.

The New York Stock Exchange, not to be outdone, is also seeking a deal with the Tokyo Stock Exchange which will link the world’s two biggest markets through a 10pc share swap.

Where does all this leave the LSE?

Clara Furse, chief executive, is reportedly basing her defence on some great trading numbers and fundamentals to be announced shortly. Next week’s financial results will put the spotlight on strong IPO figures, high levels of trading and good transaction numbers on SETS, its electronic trading system.

It would be reassuring, however, to see the LSE spread its wings a little and become more predatory — like the Americans. A bit more ballast might help its fight to stay independent.