PT - JOURNAL ARTICLE AU - Murli Rajan AU - Nabil Tamimi TI - Payoff to ISO 9000 Registration AID - 10.3905/joi.2003.319536 DP - 2003 Feb 28 TA - The Journal of Investing PG - 71--77 VI - 12 IP - 1 4099 - https://pm-research.com/content/12/1/71.short 4100 - https://pm-research.com/content/12/1/71.full AB - This study examines the linkage between attaining ISO 9000 registration and stock performance. Our empirical findings suggest that investing in ISO 9000 companies can result in significant gains as compared to a similar investment in the S&P 500 index. For example, an initial investment of $100,000 in ISO 9000 companies at the beginning of February 1990 would have grown to $814,335 by January 2000. A similar investment in the S&P 500 market index would have grown to $423,745. Over different holding periods the ISO 9000 portfolio still outperforms the S&P 500, and in many cases at a lower level of risk relative to the S&P 500 market index.