Whilst I harbour significant doubt that simply shorting companies with newly appointed female CEOs would be an effective way of exploiting it, the glass cliff effect [0] is a known phenomena whereby female leaders are more likely to be appointed in times of crisis.

[0] https://en.wikipedia.org/wiki/Glass_cliff

You can see that over 5 years (not more data available) that gender diversity fund has significantly under-performed its reference index.

But that's not enough time to make a definitive judgment.