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Stocks , as measured by the Standard & Poor 's 500 - stock index , have been stellar performers this year , rising 27.97 % before Friday 's plunge , excluding dividends .
 organization: the Standard & Poor 's; cardinal: 500; date: this year; percent: 27.97 %; date: Friday
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 organization: the Standard & Poor 's; cardinal: 500; date: this year; percent: 27.97 %; date: Friday