asf, I agree that if the deal falls through, the share price usually returns to the pre-takeover level. However, since that date other iron ore stocks like FMG and AGO have fallen by around 15% , so a price around 75 cents might be closer to the mark, maybe less if all the recent buyers panic sell. Less again if the All Ordinaries has fallen to 3650!
Personally I think OST would go ahead with it anyway.