All excellent questions and I am sure absolutely noone knows the correct answer. So much hype has been put into this "proposed" merger that it is impossible to tell the outcome.
Should I conjure an opinion, I would say based on what has been publicly printed, if I were holding ONYI at a higher price and could buy more USSE, I would sell ONYI and buy more USSE. Regardless of what happens to the share price after the merger, it will happen to holders of both companies equally afterwards. So who wouldn't want to hold more shares at a cheaper price?
Good luck on your decision!
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