You have to be more precise - which investment bankers? The ones that underwrote this deal (and were thus paid by Square) aren't going to be happy - their job i

You have to be more precise - which investment bankers? The ones that underwrote this deal (and were thus paid by Square) aren't going to be happy - their job is to price the stock and anticipate demand accurately enough that there is only a 'reasonable' pop, say 15-30%.