In the first such cross-border link, brokers will be able to trade freely in either market.The London Stock Exchange is cutting dealing charges by 60%, though not, it claimed, in response to a decision by three top inter-dealer brokers to switch to the cheaper Tradepoint market.
It is fragmented, with few countries giving priority to cross-border links.
For the pro-UK side, creating tighter and closer cross-border links ought to prove the enduring strengths of the union, underlining the shared interests beyond national identity.
Cooperation to reduce transnational threats should improve cross-border links between law enforcement, border control and military organizations, and facilitate joint operations against illicit trafficking.
Europe's stock exchanges noted that episode carefully.Even so, most attempts to forge cross-border links among stock exchanges have failed.
Friendlier relations, which eased restrictions on visas and cross-border links, would allow some of these networks to be put back together again.
Mr Qureshi appeared to suggest cross-border links could be harnessed to deliver peace, saying: "Pakistan is willing to play the role of facilitator with our Nato allies.
This had the positive effect that Asian banks suffered very little contagion from either the American mortgage crisis or the European sovereign-debt crisis.The penalties of self-relianceBut reduced cross-border links come at a price.
The smaller economies all fear being swamped by Indian imports.Similarly, the leaders' commitment to unite in fighting terrorism is likely to remain largely rhetorical, despite the scale of the threat, and the evidence of cross-border links.
Yahel Ben-David, an electrical engineer at the University of California, Berkeley, who has designed secret cross-border links to the internet for people in several countries, does so by adding standard USB dongles designed for home Wi-Fi networks.
Some of them are looking for cross-border links with other law firms, but it is the Big Five accountants that are pushing hardest for MDPs.Not all accountants, though, are keen.
