We examine a range of investment decisions, and ensuing portfolio performance, and established that they have statistically significant associations with personality traits captured by Costa and McRae's [1992] operationalization of Norman's [1963] 'Big Five' (Negative Emotion, Extraversion, Openness to Experience, Agreeableness and Conscientiousness), Bem's [1977] psychological gender traits (Masculinity and Femininity) and Jackson's [1976] personality traits of Preference for Innovation and Risk Taking Propensity.