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Argentina  's  Buenos Aires stock exchange  closed 6.27 percent down Monday as leading world markets tumbled due to fears of a US recession .
 country of headquarters: Argentina, Buenos Aires stock exchange
Given options, please tell me the relationships of all the listed entity pairs.Output format is "relation1: word1, word2; relation2: word3, word4". 
Option: cities of residence, top members employees, members, alternate names, origin, state or provinces of residence, title of person, spouse, city of headquarters, NA, founded by, state or province of headquarters, employee of, countries of residence, country of birth, founded, subsidiaries, country of headquarters 
Text: {0} 
 Entity Pairs:  Argentina, Buenos Aires stock exchange 
Answer:
 country of headquarters: Argentina, Buenos Aires stock exchange