3029
The beta of the broad market , typically defined as the Standard & Poor 's 500-stock index , is always 1.0 .
 the Standard & Poor 's, 500-stock, 1.0
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 the Standard & Poor 's, 500-stock, 1.0