You are aware that your neighbor trades stocks based on mathematical algorithm that he developed to predict their future prices using historical trades and prices . This neighbor continually mentions to you about the fact that these trades do not make any profit through arbitrages . Given this , you would tend to argue that the stock markets are form efficient at best 1.Weak 2Semi -strong 3 Strong

options answer

1 and 3

2 qnd 3

1 only

1 and 2

none