The market reaction to nonroutine trades by executives and directors is conventionally viewed as increasing in the market's assessment of insider informativeness about firm value. Using the market reaction as our instrument, we test the proposition that female directors appointed after Norway's pioneering board gender-balancing quota law exhibit a degree of informativeness similar to that of male directors. Consistent with this proposition, we first show that the average market reaction to female director purchases jumps from a prequota value of zero to a level similar to that of male directors. Second, the market reaction is increasing in the board's director network connectivity (but not in director busyness). Third, regardless of gender, the positive post-quota market reaction to insider purchases does not translate into holding-period adjusted abnormal performance. Fourth, insider purchase activity by both male and female directors increases significantly during the year following the 2008 financial crisis (when boards were already gender-balanced). If male and female directors are equally informed, as our tests suggest, then this spike in insider purchases also suggests that female directors are no more risk-averse than their male counterparts.
JEL classification: G14; M14
Keywords: Board gender-balancing, director network, insider holdings, trading performance