It may be priced in the stock if other traders have the same logic. If you think it's a good investment thesis, a better strategy would be to build a portfolio

It may be priced in the stock if other traders have the same logic. If you think it's a good investment thesis, a better strategy would be to build a portfolio where you go long on a basket of stocks with "not too many female execs" and another, offsetting, short basket of stocks with "too many female execs". If you do that properly, you should be able to almost entirely eliminate market and industry risk and basically "amplify" your investment thesis.