Sam do you understand what is happening with the Stability Fund buying shares in NBG and the rights offering? You best read the terms. The offering is going to be at a 50% discount to the average price of NBG over 50 days. Looks like May now will be the recap. If they do $10b this over 10 times more NEW shares out there.
As a US holder you may or may not be allowed to get rights. It depends on them filing here in the USA. I assume they will. If the deal fails the Stability Fund will finish the offering and all their shares will be voting shares which effectively means they nationalized the bank.
Personally I would wait until the END of the rights offering to buy. Not before.