No industry practitioner actually believe in strong EMH. Otherwise they would be doing something else. If the market was efficient, then no one, and I mean no o

No industry practitioner actually believe in strong EMH. Otherwise they would be doing something else. If the market was efficient, then no one, and I mean no one, would be able to achieve a higher Sharpe ratio than anyone else. A higher return would always imply higher risk. This is clearly not true, and the Sharpe ratio of different funds and investments has a high variance. Maybe you can say that weak EMH is true, that is, that the market is mostly efficient (and I believe that, as a professional market practitioner), but there will always be opportunities to make superior risk adjusted returns giving enough skill and wit.