A column by Buttonwood offers this fascinating finding:
A study by the University of Exeter Business School analysed 80,000 trades in the UK market and found an interesting dichotomy when looking at trades made by male and female directors. When men bought, the market responded by pushing the shares an average 1.55% higher in the following 20 days; when women bought, the gain was just 0.88%. Perhaps this discrepancy is driven by sexism because most fund managers are men. You can imagine the thought process: "Women directors! They're just there as tokens. Now where's my BMW? I'm off for a round of golf."
But here is the best bit. If the men had only listened to the women, their performance would have been better. In the year after a director's purchase, the average monthly gains were 0.68% when females bought, and just 0.37% for males; a cumulative spread of almost 4 percentage points a year. Women were better at taking the longer view.
Make of it what you will.