@article {Surz93, author = {Ronald J. Surz and Mitchell Price}, title = {The Truth About Diversification by the Numbers}, volume = {9}, number = {4}, pages = {93--95}, year = {2000}, doi = {10.3905/joi.2000.319444}, publisher = {Institutional Investor Journals Umbrella}, abstract = {Most of us have heard the statement {\textquotedblleft}90\% of available diversification is achieved with a 15-stock portfolio.{\textquotedblright} Very few, if any, of us behave as though we believe this statement, and there{\textquoteright}s good reason why{\textemdash}it{\textquoteright}s not true. This article lays out the truth about how many times it takes to obtain adequate diversification in a domestic equity portfolio. It{\textquoteright}s much more than 15.}, issn = {1068-0896}, URL = {https://joi.pm-research.com/content/9/4/93}, eprint = {https://joi.pm-research.com/content/9/4/93.full.pdf}, journal = {The Journal of Investing} }