This study investigated the level of portfolio diversification among Korean financial consumers and examined how financial, sociodemographic, and psychological factors differ by diversification level. Using the Herfindahl-Hirschman Index (HHI), financial consumers were classified into three groups: high diversification (19%), moderate diversification (34.6%), and high concentration (46.5%). The findings revealed significant differences in financial, sociodemographic, and psychological characteristics among consumer groups classified by HHI levels (p < 0.001). As risk tolerance increased, the likelihood of holding highly diversified investments also increased. In addition, subjective fund literacy was identified as a significant factor increasing the probability of belonging to the highly diversified investment group.
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Hyun-Jin Lee
Joo-Yung Park
Jung-Hyun Kim
The Korean Journal of Community Living Science
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Lee et al. (Sat,) studied this question.
www.synapsesocial.com/papers/69ba41e04e9516ffd37a1cd3 — DOI: https://doi.org/10.7856/kjcls.2026.37.1.95