1061
The American Stock Exchange index was down 1.66 points at 559.68 , and was off 1.26 for the week .
 organization: American Stock Exchange
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 organization: American Stock Exchange