Members of the group, known as the Integrated Latin American Market, said they plan to merge their stock markets to form one cross-trading platform after two rounds of successful testing, Andina News reported.
The countries will trade on the joint exchange in mid-April and will begin to operate as a complete unit starting May 30.
The integration was proposed last year and was supposed to be finished by the end of 2010, but was postponed.
Officials said the new platform will list some-560 companies, combining listings from each individual country, making it the largest Latin American exchange by number of companies listed.
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