ɪn ɐ tˈuː θˈaʊzənd sˈɪks pˈeɪpɚ pˈʌblɪʃt ɪnðə dʒˈɜːnəl ʌv mˈɑːɹkɪɾɪŋ, ɪt wʌz ʃˈoʊn ðˌæɾə poːɹtfˈoʊlɪˌoʊ ʌv stˈɑːks tʃˈoʊzən bˈeɪst ˌɔn ðɛɹ kˈʌstəmɚ sˌæɾɪsfˈækʃən aʊtpɚfˈɔːɹmd ðə mˈɑːɹkɪt.
In a 2006 paper published in the Journal of Marketing, it was shown that a portfolio of stocks chosen based on their customer satisfaction outperformed the market.