Dontcry,
ECU and AUMN should trade close to lock step, with the 1:20 ratio, of course, from here until the merger is finalized. One reason for this, is that I think there is little doubt that this deal will go through as agreed. Very doubtful that any other suiter will come along and upset this applecart. Thus, any divergence in the 1:20 ratio, will be jumped on by arbitragers, and brought quickly back into balance.