Greek bank chiefs announced on Sunday four banks would be recapitalised Shares in the National Bank of Greece and Eurobank plunged by 30 percent in early trading on the Athens stock exchange on Monday, following a suspension of their plans to merge. The Athex index of leading shares was down by 1.69 percent at 809 points shortly after opening, with a sub-index of banking stocks off by 16.67 percent, after the Greek central bank said late Sunday that the four biggest banks in the country would be recapitalised separately.