Regarding MTI.B, there are total 31,231,043 shares. 7,716,387 (about 2.5% of total) shares have changed hands today. Price drops 47.6%, which means its 97.5% shareholders lost almost half of their money on this single trading day.
The reasons of these 2.5% shareholders selling:
A. Bad news, its price could be lower in very near future;
B. Sell short, some people predicted its price could be lower in near future;
C. Had to sell, because some shareholders had margin problem;
D. Inside trading;
E. what else?
Let analyze a little more:
A is obvious, but should it drop so much? Remember 97.5% shareholders still hold it.
B is unlikely.
C is definitely there, but we do not know the percentage.
D is unlikely, because they should do it before the bad news came out.
I hope C took a big percentage.
It will be an intresting day tomorrow.